Where to operate employing: Is the internal cloud still a external cloud?
Where and what application program of data centre of operation is one of the greatest decision which IT manager must make. Fortunately have a lot of kinds of choices that can lower costs and improve the business flexibility, such as the server Virtual , internal cloud, public cloud and external privately owned cloud.
Most organizations are utilizing these choices. Study a manager Antonio Piraino and say, at present, 70% of the enterprises utilize the server virtually to lower costs according to Tier1 Research. More than 10% of the enterprises are using or planning to use the cloud to calculate at present.
Want, utilize cloud calculate new chance that offer, IT organization must understand server to be virtual with of different type difference that cloud calculate, understand that has seen from various characteristics of application program used every one to carry out the risk that the environment may be produced.
What is a cloud to calculate?
People would like to know until server virtual already until why calculate the sense to the cloud still reduce enterprise, buy physical quantity of server, lower costs notably, perhaps Interest. However, this is not the same thing at all.
Different clouds that can be chosen calculate
The clouds of two kinds of basic types calculate: The public cloud calculates to calculate with the privately owned cloud. The type that the cloud calculates can also generally follow its place on inside and outside of enterprise of enterprise Distinguish with characteristic of safe degree,etc. that offers.
It is that a cloud calculates the provider provides server, stores, network and application program resource for user on Internet that the public cloud calculates. According to defining, it is external in enterprises that the public cloud calculates.
The privately owned cloud calculates two kinds of forms: The internal cloud calculates to calculate with the external cloud. Internal cloud calculate the intersection of data and centre in you, offer to IT manager to can overall to control with resource.
The external privately owned cloud has calculated and combined the internal cloud calculating and characteristic which the public cloud calculates. They and public cloud calculate that the same, because they are external in enterprises. However, calculate the difference with the public cloud, the application program runs on the specialized server, the cloud calculates providers to calculate and build a container wall around the external privately owned cloud, make it calculate safer than the public cloud. As to resource until privately owned cloud calculate, IT manager have, calculate loud control power than public cloud. It is an example which external privately owned clouds calculates that the fictitious privately owned cloud of Amazon calculates.
How to make decision
Choose where to operate the application program depend on a lot of factors:
Characteristic and treatment of application program require including performance require, store, require and safe requirement, usability require, want the intersection of data and quantity and the intersection of service and magnitudes of agreement that transmit.
The important task properties of the application program.
Usable resource capacity in the data centre.
The one that it is expected is saved.
Policy.
Consultation and cheif technology officer Chris Swan of the technological company Capital SCF located in London say, it decides procedure operated that where application program is that you need to establish one. This procedure is assessed and baled by application program at first, if Capacity Planner software of PlateSpin Recon and VMware of Novell can be used for describing the physical IT environment and determining which application program can be Optimize performance carry on virtual.
The next step, every application program or application program Deal with and should compare with at every one carrying out at environment run by the security of application program.
Once confirm you which application programs want last cloud while calculating,P2V physics to fictitious , V2V is fictitious to invention With Z2V zero’s is to invention The tool can help to move the application program in independent server, virtual server and cloud physically while calculating.
Tags: application program, two kinds, business flexibility, server stores, physical quantity
Must know Six kinds in the switchboard is employed are set up safely
The L2-L4 layer is filtered
The present new switchboards can mostly realize various filtration demands by it is regular to be set uping. The rule has two kinds of modes, one is MAC mode, can realize the machine format segregation effectively according to the source MAC or purpose MAC according to the needs of user, another kind is IP mode, can employ port and purpose to employ ports to filter the data package through source IP, purpose IP, agreement, source; The rule to set up must add on corresponding receiving or conveyance port, when the switchboard, this port, receives or transmits the data, according to filtering the rule to filter the package, whether determine to transmit or abandon. In addition, the switchboard passes the hardware ” logic negate AND gate ” Carry on logical calculus in filtering the rule, realize and filter the rule to confirm, do not influence the data to transmit the speed at all.
802.1X, because of carrying oral access control
In order to prevent the access of the LAN of the disabled user, ensure the safety of the network, on the basis of carrying no matter the oral visit control protocol 802.1X is used widely in wired LAN or WLAN. The switchboard products of new generation not only support Local of 802.1X, RADIUS verification mode but also support the access of Dynamic VLAN of 802.1X, namely on the basis of VLAN and 802.1X, where to insert no matter the users who hold some user account are inner in the network, all will surmount based on port VLAN restriction under the original 802.1Q, insert with VLAN that account number appoint this in the group all the time, this function has not merely offered the flexible facility for inner mobile subscriber’s application of resources of network, while ensured the applied safety of network resource; In addition, in the application of 802.1X, if the port has appointed the item Guest VLAN, the access users under this port if authorized fail or without the user account at all, will become the members of group Guest VLAN, can enjoy this corresponding network resource within groups, this kind of function can be that some some applied colonies of network open minimal resources too, and offered a safe most peripheral access for whole network.
Flow control traffic control
The flow control of the switchboard can be prevented because of the data packet of radio, the multicasting data packet and because the flowrate of data package of Improper unicast data of the destination address over causes the abnormal state of the switchboard bandwidth to load, and can improve the whole efficiency of the system and keep the stable operation of the online security.
SNMP v3 and SSH
The safe network management SNMP v3 proposes the brand-new architecture, concentrate SNMP standards of every edition together, and then strengthen the safety of network management. The security model that SNMP v3 proposes is a security model which is based on users, namely USM.USM is based on what users carry on to encrypts and authorizes the news of network management, particularly encrypt and authorize by the name of user userNmae with some agreements and cipher key Authoritative engine identifier EngineID It determines recommend encrypting the agreement CBCDES, authorize the agreement HMAC-MD5-96 and HMAC-SHA-96 to come ,And time limit offer data integrity and origin authorize and data privacy and news time limit serve through authorize, encrypt, thus prevent effectively it is not authorized user’s modification, mask of the administrative information and are eavesdropped.
As for through the long-range network management of Telnet, because Telnet serves a fatal weakness – -It transmits user name and password by way of cleartext, so, it is very easy to be steal the password by the person out of ulterior motives, attacked, but while adopting SSH to carry on the communication, user name and password have been encrypted, the ones that have prevented to the password are eavesdropped effectively, it is convenient for network management personnel to carry on the network management of long run security.
Syslog and Watchdog
Syslog of switchboard can systematic error in the intersection of daily record and function, the expectation information that users such as the system configuration, change of state, state regular reporting, system backout,etc. presume is conveyed to the server of the daily record, network management personnel grasp the operation conditions of the apparatus according to the information, discover the problems early, dispose and presume and arrange and hinder, run ensuring network peace and steadiness in time.
Watchdog is through presuming a time-recorder, if the time interval internal timer that sets for was not restarted, produce, restart order by one inherent CPU, make apparatus restart, function this can make switchboard can intelligence is restarted automatically under the urgent trouble or unexpected situation, ensure the operation of the network.
One pair of map files
Some newest switchboards, still possess one pair of map files. This function staging failure of firmware,etc. in unusual cases of protection device Can still start normally and operate. The filing system is divided into majoy and mirror two parts and pays and keeps, if a filing system is damaged or cut off, another filing system will rewrite it, if two filing systems are both damaged, then the apparatus will remove two filing systems and rewrite in order that acquiescence is set up while dispatching from the factory, guarantee system’s security and start and run.
Tags: control protocol, two kinds, network resource
Take precautions against ARP cheats Congenital immunity of can let routering
ARP has cheated and attacked and already become the root of the trouble which destroys management of Internet cafe at present, it is a great trouble of trusted subordinate of boss and network management person of Internet cafe. Known ARP cheats and is divided into two kinds now, one is deception of the router ARP table; Another kind is that the gateway of Intranet PC is cheated correctly.
ARP Address Resolution Protocol, address resolution protocol It is a lower layer protocol located in TCP/IP protocol stack, responsible for the correspondent MAC address of a certain IP address resolution.
The principle that the first kind of ARP cheats is – -Catching gateway data. It informs of a series of Improper Intranet MAC address of the router, and is going on constantly according to certain frequency, make the actual address information unable to pass and keep in the router more newly, all data of the router can only be sent to the Improper MAC address finally, it is unable to receive the message to cause normal PC. The principle that the second kind of ARP cheats is – -Forge the gateway. Principle of it to set up false gateway, let, send data to false gateway PC that it cheat, but not surf the Net through the normal router route. In PC’s view, can’t surf the Net, ” network disconnecting ” .
Generally speaking, it is very serious that ARP cheats the consequence attacked, will cause the large-area disconnecting under most situations. Some network management person is not qcquainted with this, while breaking down, it is OK to think PC, it was collinear that the switchboard was not lost ” The skill ” ,Telecommunications do not acknowledge the broadband trouble either. And if when the first kind of ARP cheats and happens, so long as restart the router, the network can resume in an all-round way, that question must be in the router. For this reason, broadband router has carried many ” black pans ” .
As the producer of the router of Internet cafe, to taking precautions against ARP have to cheat doing in many one, a exterior job. First, input IP-MAC of all PC into a static table in the broadband router, this lets router IP-MAC be bound. Second, persons who persuade the network management strongly are setting up the static ARP information of the gateway on Intranet all PC, this lets PC IP-MAC bind. Generally the producer requires both jobs are done, called IP-MAC to bind bidirectionally.
The method is valid, but the work is very tedious, management is very troublesome. It was originally strenuous that each PC is bound, adding in the router, maintained, so one bunch of long tabulation of management, suffer unspeakably especially. Once dilatation adjust, change network card in the future, neglect, cause confusion while being very easy. If you are anxious to some extent, happy to the route IXP aircraft type of Internet cafe that might as well then choose, it can make you a little more relieved. Because is too happy to need IP-MAC to bind to the router at all, there are not that long a bunch of address lists. Deal with ARP, so long as you make to bind right away getting all right while being unidirectional PC. This route can refuse ARP deception of the gateway correctly effectively, it is congenital immunity!
Happy to depend on two effective technical measures of it to ARP congenital immunity in the route. First, unique NAT handles the mechanism, second, the initiative strick precaution mechanism of the gateway.
The treatment to NAT of the products is different from common protocol stack way, it is on the basis of original network protocol, have carried on ruggedization, protection and dilatation. Though NAT is to be canonial network protocol,implement method can with each their apparent can, just guarantee to reach the same goal by different routes. ARP was cheated and acted only to the open, general system, it has utilized the loophole on the operating mode of the universal system, but it is powerless to realize the mechanism to NAT, because NAT has designed the powerful protection word separator. This can to the intersection of ARP and principle of congenital immunity to route.
In addition, ARP to imitate gateway cheat, the intersection of product design and the intersection of ARP and the intersection of broadcast and mechanism of gateway for confront with each other, it turns towards Intranet to announce the accurate gateway address with a frequency that can select, maintain the just rights and interests of the gateway. Can’t remove arp virus in time temporarily, the network management person has not done IP-MAC on PC to tie timing yet, it can maintain the operation of the network to a certain extent, avoids the calamitous consequence, get the time to repair systematically. This is that ARP takes precautions against the mechanism voluntarily.
However, if does not bind IP-MAC on PC, though take precautions against the mechanism voluntarily, the network is still running in spite of illness. Because this kind of ARP is a thing of Intranet, do not pass the router. Let the router meddled in and confronted with each other, can’t stamp out. When ARP too rampant, will take place on-off trouble, that to take precautions against mechanism in cheat go on struggle of the working a two-handed saw type with ARP voluntarily. For this reason, the products have also specially offered one ARP to cheat the detect, tool software positioned, taken precautions against, releasing to all Internet caves free, the persons who help the network management find the existence that ARP cheats, offer work for removing ARP and cheating the source, assist a ruler in governing a country, join happy to take precautions against mechanism voluntarily, deal with ARP to cheat effectively.
Even so, the persons who still remind the vast network management of Internet cafe, in order that once and for all, fee some strength make IP-MAC, bind for each PC, so can eliminate ARP, cheat trouble that bring completely. Moreover, the route only needs binding unidirectionally, has already saved remaining half more tedious work for you, and does not need to restart the router and breaking the network while setting up. Router itself does not afraid of ARP, whom you finish at the PC again bind, let PC afraid of ARP either, work along both lines, your Internet cafe can be in order to sleep without any anxiety.
Tags: internet ca, ip address resolution, internet cafe, arp table, network management, ip protocol
Intel introduces 6 nuclear processors formally Trigger price of 999 dollars (Fig.)
News Intel introduces 6 nuclear processors, including server chip Xeon 5600 and desktop chip Core i7 980X Fig. formally on Tuesday on March 17 . Companies such as IBM, Dell, Hewlett-Packard,etc. will all adopt, and claim to bring faster speed to the game player, raise cost efficiency for IT department.
6 nuclear processors of Intel
6 nuclear chips of two kinds both adopt 32 nanometers of latest manufacturing process, the lowest Core i7 980 prices are 999 dollars, supreme Xeon 5680 prices are 1663 dollars. To server customer, the price of Intel is very worthwhile. General manager’s wave Iraq’s morality Davies Boyd Davis of platform marketing of the server of Intel Claim, already there are 8% that need to upgrade in the installation server, and there are a lot single nuclear servers old, with low efficiency.
Intel increase AES-NI to be senior to encrypt the standard new order at chip Technology, improve security through strengthening and encrypting performance. Davies claims, the encryption course of the old chip may make the system unable to operate, and AES is dealing with the work and flowing to more efficiently.
Dell took the lead in selling server and work station which adopts Xeon 5600 chip, this company introduced 9 PowerEdge blade types, framework type and tower server on Tuesday, and 3 Precision tower work stations. It is getting which introduce newer too in IBM System x server, performance than before improve by 40-60% several generation. In addition still put out BladeCenter HS22 and fictitious BladeCenter HS22V that optimized. In game, Hewlett-Packard is producing HPE-180t Pavilion desktop which is adopting Core i7 980x chip.
Tags: server chip, game player, blade types, cost efficiency, chip technology, platform marketing, trigger price
The Infortrend ESDS series products support hard disk system of 2.5 inches
Infortrend offers the storage system of 2.5 inches of hard disks, this system has outstanding characteristic density, can help users to reduce the systematic power consumption prominently. Series EonStor DS can already support hard disk system of 2.5 inches now, and it is available in a record of location and 2U/24 a record of location and two kinds of measurement models to offer 1U/12.
With the positive popularization to 2.5 inches of hard disks of manufacturer of hard disk, the production of this kind of hard disk has got fast growth. In 2010, 3.5 inches of hard disks are bad with the price of 2.5 inches of hard disks to still keep between 10% and 15%, however, in 2011, this disparity has already nearly totally disappeared, therefore further promoted the growth of the sales volume of 2.5 inches of hard disks too.
Compare with 3.5 inches of hard disks, 2.5 inches of hard disks have better characteristic density. On the identical space, 2.5 inches of hard disks are preserved twice with quantity of 3.5 inches of hard disks. In efficiency, 2.5 inches of hard disks every IO can save 50% of the power consumption, has reduced the cost of enterprises greatly. Meanwhile, 2.5 compact type of hard disk design, make them have good resisting shock even.
In addition, 2.5 inches of connections and expansion cupboard of 3.5 inches hard disk that hard disk system of 2.5 inches of Infortrend can be flexible, make customers have a lot of different choices in system expansion.
Infortrend product planning director shows sophisticatedly and virtuously, ” we find, for its price and characteristic factor, to enterprise hoping to strengthen data storage, 2.5 inches of hard disks have already become a very attractive choice gradually. In order to help enterprises to dispose 2.5 inches of hard disks to store better, Infortrend has offered a lot of physical dimension models and expanded and selected, make enterprises choose the appropriate memory disposition, meet various demands of theirs best. ”
Tags: attractive choice, hard disk, two kinds, physical dimension, product planning, system expansion, planning director
How to guarantee the switchboard security of route completely
Many route switchboards deserve the place of study, we mainly introduce how to guarantee the switchboard security of route completely here. How to filter user’s communication, ensure the valid data of the security to transmit? How to stop the disabled user, ensure the application of online security? How to carry on the safe network management, find the disabled user of the network, security of the illegal act and long-range network management information in time? We have summarized some popular security set feature services on market of 6 recent route switchboards here, hope it is helpful to everybody.
The L2-L4 layer is filtered
The present new route switchboards can mostly realize various filtration demands by it is regular to be set uping. The rule has two kinds of modes, one is MAC mode, can realize the machine format segregation effectively according to the source MAC or purpose MAC according to the needs of user, another kind is IP mode, can employ port and purpose to employ ports to filter the data package through source IP, purpose IP, agreement, source; The rule to set up must add on corresponding receiving or conveyance port, when the switchboard, this port, receives or transmits the data, according to filtering the rule to filter the package, whether determine to transmit or abandon. In addition, the route switchboard passes the hardware ” logic negate AND gate ” Carry on logical calculus in filtering the rule, realize and filter the rule to confirm, do not influence the data to transmit the speed at all.
802.1X, because of carrying oral access control
In order to prevent the access of the LAN of the disabled user, ensure the safety of the network, on the basis of carrying no matter the oral visit control protocol 802.1X is used widely in wired LAN or WLAN. For example route switchboard products of new generations such as China large latest GigaX2024/2048,etc. not merely support Local of 802.1X, RADIUS verification mode, and support the access of Dynamic VLAN of 802.1X, namely on the basis of VLAN and 802.1X, where to insert no matter the users who hold some user account are inner in the network, all will surmount based on port VLAN restriction under the original 802.1Q, insert with VLAN that account number appoint this in the group all the time, this function has not merely offered the flexible facility for inner mobile subscriber’s application of resources of network, while ensured the applied safety of network resource; In addition, GigaX2024/2048 route switchboard still supports Guest VLAN function of 802.1X, namely in the application of 802.1X, if the port has appointed the item Guest VLAN, the access users under this port if authorized and failed or without the user account at all, will become the members of group Guest VLAN, can enjoy this corresponding network resource within groups, this kind of function can be that some some applied colonies of network open minimal resources too, and offered a safe most peripheral access for whole network.
Flow control traffic control
The flow control of the switchboard can be prevented because of the data packet of radio, the multicasting data packet and because the flowrate of data package of Improper unicast data of the destination address over causes the abnormal state of the route switchboard bandwidth to load, and can improve the whole efficiency of the system and keep the stable operation of the online security.
SNMP v3 and SSH
The safe network management SNMP v3 proposes the brand-new architecture, concentrate SNMP standards of every edition together, and then strengthen the safety of network management. The security model that SNMP v3 proposes is a security model which is based on users, namely USM. It is based on what users carry on that USM encrypts and authorizes the news of network management, particularly encrypt and authorize by the name of user userNmae with some agreements and cipher key Authoritative engine identifier EngineID It determines recommend encrypting the agreement CBCDES, authorize the agreement HMAC-MD5-96 and HMAC-SHA-96 to come ,And time limit offer data integrity and origin authorize and data privacy and news time limit serve through authorize, encrypt, thus prevent effectively it is not authorized user’s modification, mask of the administrative information and are eavesdropped.
As for the long-range network management of over Telnet, because Telnet serves a fatal weakness – -It transmits user name and password by way of cleartext, so, it is very easy to be steal the password by the person out of ulterior motives, attacked, but while adopting SSH to carry on the communication, user name and password have been encrypted, the ones that have prevented to the password are eavesdropped effectively, it is convenient for network management personnel to carry on the network management of long run security.
Syslog and Watchdog
Syslog of switchboard can systematic error in the intersection of daily record and function, the expectation information that users such as the system configuration, change of state, state regular reporting, system backout,etc. presume is conveyed to the server of the daily record, network management personnel grasp the operation conditions of the apparatus according to the information, discover the problems early, dispose and presume and arrange and hinder, run ensuring network peace and steadiness in time. Watchdog is through presuming a time-recorder, if the time interval internal timer that sets for was not restarted, produce an inherent CPU and restart the order, make apparatus restart, function this can make route switchboard can intelligence is restarted automatically under the urgent trouble or unexpected situation, ensure the operation of the network.
One pair of map files
Some newest switchboards, still possess one pair of map files as A S U SGigaX2024/2048. This function protection device in unusual cases Staging failure of the firmware,etc. Can still start normally and operate. The filing system is divided into majoy and mirror two parts and pays and keeps, if a filing system is damaged or cut off, another filing system will rewrite it, if two filing systems are both damaged, then the apparatus will remove two filing systems and rewrite in order that acquiescence is set up while dispatching from the factory, guarantee system’s security and start and run. In fact, the time of mostly lower feet in the safe design of some route switchboard products that appeared recently – -Set up defenses in depth, filter successively, leave no stone unturned to exclude the danger factor existing to the greatest extent. If the masses of enterprise’s users can fully utilize the set feature service of online security, match the reasonable association, can take precautions against various attacks overflowing day by day on the network and encroach on to the maximum extent, wish since this can be firmer and safer too in your enterprise network.
Tags: feature services, two kinds, access control
Keep away from the unscrupulous merchant! Four major true and false of storing the products are distinguished
It is the Consumers’ Day of 3.15 world today, the unscrupulous merchants in the electronic market relatively disappear in this period of time, but after crossing this section, a lot of repulsive phenomena of deceiving consumers are certain to appear again. Everybody thinks 3.15 world can rest assured to buy the products during Consumers’ Day, but many trade companies making profit as one’s only aim type psychological tactics often, the more rampantly one sells the fake products! So, to consumer, the homework is very important before doing the good thing, from person who select that begin most, inquire the price and to paying money, starting with, may let the intersection of you and flower offer much to wrong money by every last.
Will give it to everybody in some suggestions while buying and storing the products, especially the hard disk of the memory this author. At present until the intersection of memory and price climb high constantly, nobody think the intersection of memory and fake products well market seem begin, look up already also more and more already in the past, it is in short supply in addition, recent southern labour market talents, the products of electronic market all present the situation of rising in price, believe the price of recent memory wants to make a reduction not optimistic, so the fake products are full of the market again cannot know either.
As to the memory that the fake products walk crosswise, the hard disk has a lot of tricks too, but the majority takes smuggled goods as the core, there are no fake products. Because these two kinds are products of very high technological content, this characteristic is like a double-edged sword even more. First of all, with high technical content, it is complicated for the craft to can guarantee the processor will not be imitated to go imitatively like Nike shoes, just say any processor that you bought or a hard disk, must come from Intel, AMD or Seagate, the west to count not enumerate here one by one ,Will not appear really ” The fake products ” . But with high technical content, as to ordinary consumer, it is difficult to understand in a lot of parameters, this give illegal the intersection of trade company and very old opportunity at the same time, through people being enough to obtain the sudden huge profits from it in cognition degree in products.
Tags: intel amd, two kinds, double edged sword
Method of the cost of connecting up of effective reducing
As Ethernet and TCP/IP become all networks the connection network inside including factory workshop, the control room, factory office even whole enterprise Standard time,become the power supply way to be simple more. So, Ethernet supplies power PoE Concept just arise at the historic moment.
Ethernet will become reality if Ethernet supplies power
Ethernet supplies power PoE It is a kind of permission that is connected as standard Ethernet through a form and 5 kinds of paired lines, transmit the technology of data and power at the same time. PoE can offer the regular 48VDC voltage for 5 kinds of traditional paired lines.
Use two kinds of apparatuses of PoE, one is power supply unit PSE ,This kind of apparatus is mainly Midspan adapter and Ethernet exchanger, can offer the power and network link for PoE apparatus connected ; Another kind is called receiving the electric apparatus PD ,This kind of apparatus can be any apparatus, defend lens and other digital devices such as wireless access point, VOIP telephone, Ann.
802.3af standard appointed two kinds of operation modes: In it is at TypeA for mode,power and data data through being the same to,until 10/100Base-T Ethernet transmit; And control the project network to have the copyright in TypeB mode, the power, to transmitting through the unused data. Choose to depend on PSE apparatus, but not PD apparatus by TypeA mode or TypeB mode. In addition, have also proved in the standard PSE apparatus can use the any kind of mode, but can’t use two kinds of modes at the same time.
Because has used the example not in accordance with standard PSE apparatus at present, so before using PSE apparatus to supply power PD apparatus, need to check whether PSE apparatus accords with the standard. If the intersection of PD and apparatus will accord with automatic the intersection of stop and power supply standard is then the intersection of PSE and apparatus. So did not supply power in Ethernet and use at that time, this kind of characteristic integrate in each apparatus which accorded with 802.3af standard Can prevent according with the standard apparatus and breaking down.
PoE apparatus has resistors of one 25kOhm, can be regarded as PoE ” Sign ” . As exchanger or other PSE apparatuses are measured to the signature resistor, then it will measure the apparatus connected to resistor automatically, and supply power for this apparatus after measuring automatically successfully. When the resistor has not connected any apparatus, PSE apparatus will close PoE power.
Why use Ethernet to supply power PoE ?
Offer power and Ethernet data to mean the cable quantity needed in the industrial environment of scene will be reduced greatly at the same time through the same cable. In the typical manufacturing plant environment, cost and maintenance expenses connecting up are often very considerable. On the basis of the the positions of factory and industrial environment, the cost is usually 10-100 dollars / foot to connect up. So, it is not at all surprising to the high concern of the cost of connecting up for engineer and designer.
Network equipment and a lot of on-the-spot apparatuses need DC power to work, but it is not feasible to use DC power in the industrial environment at a long distance, so must use AC to transfer to DC power in the suitable range around the apparatus.
In this way engineer and designer must offer a AC power and signal or data line. Usually in the environment of the workshop of the factory, this kind of power includes a duplexing outlet, and take a wall type and install the power adapter.
From the view point of safeguarding, it is a very great improvement and progress to supply power for Ethernet apparatus through 5 kinds of paired lines. Not only because the cost connecting up again is reduced greatly, also because transmit power and data through the same cable group, it becomes simpler with the trouble hunting to safeguard, while ensuring fast transmission speed, become easier to connect too to maintain when the cable ruptures or damages.
Tags: power ethernet, wireless access point, two kinds, power supply unit, factory workshop
CeBIT German opens: Over 200 manufacturers of Taiwan exhibit
March 3 news, in the world most large scientific and technological the intersection of convention and exhibition and computer exhibition, Hanover of Germany, CeBIT among being early Opened yesterday, with ” Connected Worlds ” this year the world linked It is a theme, come from 68 countries, altogether 4157 exhibiters in the world and exhibit, among them there are over 200 manufacturers of Taiwan.
Taiwan four major the intersection of host computer and the intersection of factory and China large exhibiting totally by planetesimal, Jijia, elite, estimate that can bring 10% of the camp to accept and increase after the exhibition. The manufacturer participating in the exhibition estimates, 3D, touching accusing of, USB3.0, e-book and dull and stereotyped computer will be indispensable focuses on the field of exhibition of this year, among them is favoured the most with 3D and e-book.
Hua Shuo, planetesimal are led to go to Germany to exhibit in person by Chairman Shi ChongTang, Chairman Xu Xiang, can be regarded as this year exhibit in the manufacturer participating in the exhibition ” The specification ” Supreme manufacturer.
And focus 3D technology and e-book participating in the exhibition favoured the most this year, the market can be expected to appear on CeBIT for the first time while widelying spread first large new e-books Eee Reader of China, but the planetesimal focuses on 3D technology, introduce notebook computer and AIO and produce two kinds of solutions respectively as the main shaft with six major series of sums of electricity.
Tags: two kinds, host computer, e books, e book, taiwan taiwan, notebook computer, computer exhibition
The cost performance has priority: The enterprise switchboard is recommended under 50 people
Small and medium-sized enterprises often face two kinds while disposing one’s own networking products puzzledly: The cost pressure results in often facing the choices of price and characteristic while choosing the products; Meanwhile, not causing clearly enough to one’s own IT business demand does not often have clear purpose to the purchase of the products.
Today, we bring and direct against the small and medium-sized enterprises switchboard shopping guide’s guide to scale under 50 people to everybody, hope to offer some reference and help when the networking products are purchased for small and medium-sized enterprises.
Generally the demand for IT is not high in enterprises under 50 people, according to enterprise’s real terminal quantity, with 24, 32 or 48 switchboard products while choosing. Meanwhile, because this kind of enterprise seldom possesses the specialized network administrative staff, it relies mainly on easi to dispose and maintain to choose the products. Because is stricter to cost control when the enterprises of scale often purchase under 50 people, so, the key factor that the cost performance also should be considered.
1,H3C S1224E the whole giga of green switchboard
H3C S1224E whether the whole gigas of the intersection of green and energy-conservation of independent development, Company of H3C, manage Ethernet to exchange the products, having offered M Ethernet port in 24 10/100/1000s, all ports support the non-blocking switch of the a full range of speed and automatic upturning function of the port, the appearance adopts 19 inches of standard frameworks of steel shell to be designed.
The concrete characteristic of the products is as follows:
Energy-conservation of green, low power consumption, fan-free, there is no noise design;
Accord with IEEE802.3, IEEE802.3u, IEEE802.3ab standard;
Offer M adaptation Ethernet port in 24 10/100/1000s;
Each port supports Auto-MDI/MDIX function;
Each port offers Speed/Link/Act pilot lamp, reveal that carries the oral working condition;
Adopt and share and buffer the framework, the usable buffer memory space of each port expands several times, can strengthen transmitting the characteristic of high flux of the burst greatly;
Integrate specializedly and defend the way of thunder and lightning, can offer the grade of lightning protection of 4 grades common mode protect 7KV Speciality protect;
Reference price: 1299 yuan
2,Ai Tai SF124 switchboard
Second products that we recommend to come from, end Thai the intersection of SF124 and switchboard. This is one 24 port switchboard likewise,and at a different one is one style,there are for one of one hundred trillion Ethernet switchboards on this, but the price has decline by a relatively large margin too, so, it is limited and choosing in the small and medium-sized enterprises not big of network pressure to suitable for the budget.
SF124 basic model Ethernet switchboard is one hundred trillion Ethernet switchboard products of a bilaminar linear speed, it has offered 24 10/100Ms to adapt to RJ-45 port by oneself. SF124 need disposition use, connect up behind the power can realize all carry the oral linear speed translation functioning. The power consumption insufficient 2W that SF124 awaits the opportune moment, full load is fewer than 9W too, adopts fan-free squelch muting to be designed at the same time, very energy-conserving environmental protection. It is a first-selected apparatus of network that applies to the Internet cafe, enterprise, Residential Area, campus network connection.
The concrete characteristic of the products is as follows:
Each port supports MDI/MDI-X adaptation
Each port supports to consult the function automatically ‘ Consult duplexing mode and transmission rate by oneself
Each port supports the whole 10M / half duplex, 100M complete / half duplex work pattern
Each port supports the clog-free linear speed to exchange
Support the flow control of half duplex Backpressure
Support the flow control of full duplex IEEE 802.3x
Support MAC address to study automatically
Support MAC address to wear out automatically
Reference price: 460 yuan
3,TP-Link TL-SF1048 switchboard
The third section of recommended products are 48 one hundred trillion switchboards from TP-Link. The reason of this selected product has 48 Ethernet ports, are suitable for terminal small and medium-sized enterprises in large quantity to use. The price about a thousand yuans makes the cost performance of this sincere product very high too at the same time
TL-SF1048 is that bilaminar one hundred trillion which TP-LINK Company develops is not the Ethernet switchboard products of network management, offer 48 pieces of 10/100M adaptation RJ45 port, all ports support transmitting and MDI/MDIX automatic upturning function of the linear speed, support rack mounting of 19 inches.
The characteristic of the products is as follows:
48 pieces of 10/100M adaptation RJ45 port
All ports possess the linear speed and transmit ability
Support the port automatic turning-over Auto MDI/MDIX Function
Support MAC address to study by oneself
Standard rack mounting, use simultaneously, does not need to manage
Reference price: 1050 yuan
Tags: medium sized enterprises, administrative staff, speed link