10mbps

be divided into wide area network, LAN and 1. TCP/IP network 2. ATM Network 3. ISDN 4. Metropolitan Area Network Question 11. (radio) The topological structure of computer network mainly depends on its 1. Resource Subnet 2. FDDI Network 3. Communication subnet 4. Router Question 12. (radio) The three elements of network protocol are syntax, semantics and 1. Working principle 2. Timing 3. The process 4. Service Primitives Question 13. (radio) In the TCP/IP reference model, the e-mail pr

consider when choosing:(1) The brand of the SCSI cardChoosing a brand is important, Adaptec is a SCSI card boutique, like CPU Intel, is already the SCSI standard, of course, compatibility is no problem, and expensive price may be the only problem. In other words, if you are financially acceptable, it is recommended that you choose a Adaptec SCSI card.(2) Bus interfacePCI SCSI card is selected, the ISA SCSI card is now basically no one to buy, it should be noted that some scanners with the ISA S

. However, any future files and subfolders that are added to the folder will be encrypted when they are added. When encrypting a single file, the system will also ask if you want to encrypt the folder that contains it, and if you choose to do so, all files and subfolders that are added to the folder will be automatically encrypted. 4, improve the transmission rate of 10/100m network card Select start → connect to → show all connections, double-click the connection used by the network card, cli

Cable TV Cable (Cable) mode broadband access to the Internet is the standard docsis (Data over Cable Service Interface specification), Recently this standard has been upgraded to 2.0, and Imedia announced in April the DOCSIS2.0 chip IM6030 and a reference design that can be mass-produced immediately. This means that the new cable cat and head-end equipment will be on the market time greatly accelerated, the cost can guarantee a lower level, which is crucial to the development of cable broadband

In today's wiring market, the media and the most hype of the business is "gigabit." Remember not long ago still hype "Super 5 Class", and with "gigabit" Ethernet standards, cabling manufacturers have launched their own support "gigabit" Ethernet "6" or even "7" wiring system. The introduction of advanced products is a good thing, but I still want to remind the vast number of users do not be the media and manufacturers of the hype carried away, in the choice of wiring products calmly to consider

. Similar to HSDPA, in HSUPA, the scheduling function is performed in BTS. BTS can be based on its internal measurement/statistical information to be scheduled, can also be based on the information of the terminal feedback. Fast data retransmission based on BTS control. In the R99 WCDMA system, the control of data retransmission is carried out in the RNC. In Hsupa, this part of the function is moved to BTS, which makes the response latency and round-trip cycle greatly reduced. Performance of H

network card size of PCI or PC Card has both network card and firewall function, so also known as "Embedded firewall." This embedded firewall card provides a RJ-45 Ethernet interface with a bandwidth of 10Mbps and 100Mbps of two. For a PCI interface firewall card can be inserted directly into the computer PCI slot, for notebook PC Card firewall cards have two specifications, one is directly using the 32-bit CardBus interface with the notebook compute

connection used by the network card, click the Properties button, open the Properties dialog box, and select the Advanced tab. Select Link Speed/duplex mode in the properties column, and then change "Auto mode" to "Half mode" in the Set Value column. In this way, manually 10/100m the properties of the Adaptive Network card to the 10M Half-duplex mode, so that the network card does not automatically negotiate between the network card in the transmission of data always at

the port that enters the frame to the switch congestion port, and ensure the normal operation of other port users. Back pressure algorithm (backpressure) Bridged or switched half-duplex Ethernet uses the CSMA/CD mechanism to handle transmission problems between stations with different speeds, using a so-called "back Pressure (backpressure)" concept. For example, if a high-speed 100Mbps server sends data to a 10Mbps client through a switch, the swit

Speed-limiting switches are typically on three or more switches, and the new switch model two-tier device since 2008 can achieve the QoS speed limit of 1Mbps, such as the Cisco 2960 series switches. After this, most of the domestic standard two-layer switches can be long speed limit, the accuracy of the basic can reach 1Mbps, such as ZTE's standard two layer, H3C standard two layer can do. Older Cisco standard two-layer switches such as 2950-class switching can also be speed-limiting, but with o

overall line signal transmission, although the use of frequency generally below 100MHz, but the rising edge is generally relatively steep, especially for along the sensitive signal, such as clock signal, need to use broadband oscilloscope. 6. RS-232 Level Interface: For low-speed serial communication interface standard, level is ±12v, used for connection between DTE and DCE. 7. RS422 Level Interface: Suitable for multi-point long-distance high-speed communication, two-terminal balanced transmis

choices. Servers on the network need to huff and puff a lot of data, if the network backbone upgrade to gigabit, but the server network card is still stuck in the level of hundreds of megabytes, the server network card will become the bottleneck of networks, you must use the Gigabit network card to eliminate this bottleneck, the solution is to add a gigabit NIC on the original server. Attention should be given priority to purchase 64-bit PCI Gigabit NIC, its performance is higher than ordinary

If only to connect two computers, then regardless of serial connection, port connection or the use of two network cards to achieve interconnection is possible. However, to connect more than 3 computers, you have to connect the computers together through the hub or switch (switch). Buying a hub or switch for a network of 3 machines seems less lucrative. If the use of coaxial cable connection of the total line network, although the problem can be solved, and the network is very simple, hardware co

than one WAN port (for broadband access, such as ADSL or community broadband). 4, LAN port bandwidth occupancy mode In addition to the need to pay attention to the provision of adequate LAN port, now some of the brand's broadband router to see the appearance and other brands are no different, but also provides 4 or so LAN port, but it is the use of the hub's shared bandwidth, rather than the bandwidth of the switch exclusive way. Typically, the bandwidth of these ports is shared

segmented, which adds extra overhead because each final datagram contains its own header. While in a high-speed LAN connection, there is usually no need to worry about the extra cost associated with fragmentation, this can be a more serious problem on a Low-speed serial interface. You can change the default MTU by using the Mtuinterface command, which is formatted as follows: MTU bytes The number of bytes can be from 64~6553. (5) BW Interface bandwidth (BW) typically refers to the running r

Tags: over apply mat start parameter limit logic error man completeCause: Source-side database application logic error, resulting in heavy retry rollback, the daily production archive 300GB, offsite backup at 10Mbps speed, resulting in archive gap;Solution process:1 Isolate the current SCN number of the repositoryselect current_scn from v$database;16124807462 Generating an incremental backup based on the repository SCN in the main library--primaryshow

-in Modem is mainly used for laptops and is slim. With mobile phones, mobile office can be conveniently implemented.4. rack mountingA rack Modem is equivalent to a set of Modem in a cabinet or housing, and is powered by a unified power supply. Rack-mounted Modem is mainly used in Internet/Intranet, telecom bureaus, campus networks, financial institutions, and other network centers.In addition to the above four common Modem types, there are also ISDN and Cable Modem types, as well as ADSL. Cable

and error, too short UDP data packets, and an incorrect ICMP data packet. This type of information is generally invalid. However, if the problem is not serious, you can ignore it directly. General class prompts Kernel: conntrack_ftp: partial 227 2205426703 + 13FTP_NAT: partial packet 2635716056/20 in 2635716048/2635716075 An error occurs when the server maintains an FTP connection. Such a prompt can be ignored directly. Serious network communication problems!

Transplant environment: Cyclone IV Development Board, NIC chip for enc28j60, browser (firefox_24.0.0.5001a)First, you need to understand the NIC Chip enc28j60, a Chinese version of the manual: Http://wenku.baidu.com/link?url= 79r8johigayag9kx9-foyirh41jfsyrkxpidaw9xizdpjit5jbh8gjiobjcsiekhym-4tisqnxfd74e2tf1be2wxupuiews0rfrdiw9prksENC28J60 is not a standard Ethernet PHY, it uses the SPI protocol and supports only 10Mbps Ethernet speeds. First, build t

server, it is important to be able to find each process by the PID separately.Usually we recommend that you run fewer services on each server, and you can increase the server if necessary. If you see a server with thirty or forty listening ports open, then make a record, go back to the time to clean up, reorganize the server.Vi. CPU and memoryNote the following issues:Do you have any spare memory? is the server swap between memory and hard disk?Are there any remaining CPUs? How many cores does