What is the difference between a crossover cable and a direct cable?

The difference between the crossover cable and the direct connection cable is: 1. The direct connection cable uses the same wire sequence at both ends of the same network cable, either the 568A standard or the 568B standard, while the crossover cable The cables are two sections of the same network cable using different line sequences; 2. Straight-through cables are used to connect computers to switches and routers, while crossover cables are used to connect computers to computers.

The difference between the crossover cable and the direct connection cable is:

#1. Direct connection cable, that is, the same Both ends of the network cable use the same wire sequence, either the 568A standard or the 568B standard. Crossover cable means that two sections of the same network cable use different wire sequences. One end is 568A standard, and the other end is 568B standard. (568A standard: green white, green, orange white, blue, blue white, orange, brown white, brown, 568B standard: orange white, orange, green white, blue, blue white, green, brown white, brown)

2. Straight-through cables are used to connect computers and switches (or HUB), routers and switches (or HUB). Crossover cables are used to connect computers to computers and routers to routers.

3. Use crossover cables to connect devices of the same type, and use straight-through cables to connect devices of different types. (PC belongs to the third network layer because it has a routing function)

Extended information:

Network cables are essential for connecting to the LAN Less. There are three main types of network cables commonly used in local area networks: twisted pair, coaxial cable, and optical cable. Twisted pair is a data transmission line composed of many pairs of wires. Its characteristic is that it is cheap, so it is widely used, such as our common telephone lines. It is used to connect to the RJ45 crystal head.

There are two standards for twisted pair termination: T568A and T568B, and there are two main connection methods for twisted pair: straight-through cable and crossover cable. Both ends of the crystal plugs of the straight-through cable follow the T568B standard. Each group of twisted-pair lines corresponds one-to-one at both ends. The same color is consistent in the corresponding slots of the crystal plugs at both ends. It is mainly used when the Uplink port of the switch (or hub) is connected to the ordinary port of the switch (or hub) or the ordinary port of the switch is connected to the computer network card. One end of the crystal head of the crossover cable follows 568A, while the other end adopts the 568B standard, that is, 1 and 2 of crystal head A correspond to 3 and 6 of crystal head B, and 3 and 6 of crystal head A correspond to 1 of crystal head B. , 2. It is mainly used to connect the ordinary port of the switch (or hub) to the ordinary port of the switch (or hub) or the network card to the network card.

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