568B standard: orange-white, orange, green-white, blue, blue-white, green, brown-white, brown-white.

The difference between the two approaches is that the orange and green colors are swapped.

The two machines can be interconnected in two ways
1 Use the switch to make two wires, both of which are type B, i.e., orange-white, orange, green-white, blue, blue-white, green, brown-white, and brown. After the fabrication, connect the machine to the switch, set the IP or automatically obtain it.
2 Use crossed lines to make a wire with one end of B-type and one end of A-type, and one end is: orange-white, orange, green-white, blue, blue-white, green, brown-white, brown-white, brown, and the other end: green-white, green, orange-white, blue, blue-white, orange, brown-white, brown-white, access to the two machine network cards to set the IP
The direct cable connects the Ethernet port of the router to either port of the switch

Generally, the 568B parallel (straight-through) line is used
The 568B line sequence can be memorized in the order of initials:
The initial of [orange] is C, which is a group.
[Blue] initials are La, which is the second group.
[Green] initials are Lv, which is three groups.
[Brown] initials are Z, which is four groups.
The initials of blue and green are both L, so the first method of initials + finals is adopted, with blue in front and green in the back.
The mantra is:
Hold the crystal on the copper under the nose,
From left to right,
Orange, blue, green, brown and white in front,
Three-five interchangeable blue for the shaft.

instance
Use a direct connection line between different devices and a cross line between the same devices.
For example:
When the switch is connected to the router, a direct connection is required.
crossover lines between switches and switches;
Direct connection between the switch and the PC;
Use a crossover line between the router and the switch (the router can be thought of as a multi-port PC. The switch is a Layer 2 device, and the router is a Layer 3 device); the ADSL modem can be regarded as a small router, and the ADSL modem and the PC connection should also use crossover cables.
Pass-through cables are used to connect computers to switches (or hubs), routers and switches (or hubs).
The crossover wire is used to connect the computer to the computer, and the computer to the router. Crossover lines are not used very often
The order of the 568A's wiring from left to right is: white-green, green, white-orange, blue, white-blue, orange, white-brown, and brown.
568B is: white orange, orange, white green, blue, white blue, green, white brown, brown.
The so-called crossed wire refers to a twisted pair with a 568A standard at one end and a 568B standard at the other end. A direct cable is a twisted pair cable that is 568A or 568B at both ends. By the way, when many friends make RJ45 heads, they only ensure that the order of the two ends of the line corresponds one by one, but they do not follow the 568A/568B cable standard. Although it can be connected to the network, the anti-interference of this kind of line is very poor, and there are often situations such as slow transmission speed and good and bad network. I hope that you must do it in accordance with the standard when making network cables, and according to the actual engineering experience, the length of the network cable should not be less than 1.5 meters, which is very necessary to improve the stability of the network!
Let's take a look at how to choose the right direct and twisted pair cables. Direct connections are required when the following devices are interconnected:
Connect the switch or HUB with the router;
Computers, including servers and workstations, are connected to a switch or HUB.
When these devices are connected, they need to use crosswires:
1. The switch is connected to each other through the UPLINKS port.
2. The HUB is connected to the switch;
3. Connection between HUB and HUB;
4. Two PCs are directly connected;
5. Connection between the router interface and other router interfaces;
6. The ADSL modem of the Ethernet interface is connected to the network card interface of the PC.
The equipment of the same layer is connected with the reverse connection, and the equipment of different layers is connected with the direct