Prerequisites for creating a network: creating a network cable

The crossover network cable is used for the connection between the adsl modem and the HUB (not all of which are related to the MODEM design). The connection between the HUB and the HUB does not pass the cascade connection port, and the two computers are directly connected to each other through the NIC. The production method is basically the same as the above, but the online order is not like 568B. It adopts the 1-3, 2-6 exchange method, that is, one uses 568B for production, and the other uses 568A for production.

Differences between express connect and crossover

Main Line, that is, straight line, standard 568B): The line sequence at both ends is the same, from left to right is: White orange, orange, white green, blue, white blue, green, white brown, brown.

Reverse line, that is, crossover line, (568A): one end is the line sequence of the positive line, and the other end is from left to right: white green, green, white orange, blue, white blue, orange, white and brown.

Which of the following is the correct choice for the main line and the reverse line when various devices are connected. The HUB represents the HUB, the SWITCH represents the SWITCH, and the ROUTER represents the ROUTER:

PC-PC: reverse line

PC-HUB: Main Line

HUB-HUB common port: Anti-line

HUB-level connection: Anti-line

HUB-HUB common port-level connection port: Main Line

HUB-SWITCH: Anti-line

HUB (cascade Interface)-SWITCH: Main Line

SWITCH-SWITCH: Anti-line

SWITCH-ROUTER: Main Line

ROUTER-ROUTER: reverse line

100BaseT is connected to a twisted pair. The 100 Mbit/s eia/TIA 568B is used as the standard specification.

The procedure is as follows:

Step 1: Use the oblique port to cut down the required twisted pair length, at least 0.6 meters, up to 100 meters. Then, remove the outer skin of the twisted pair (which can be used to cut anything) with 2-3 cm pairs. Some twisted pair cable contains a soft nylon rope, If you strip out the twisted pair outer skin, feel exposed part is too short, and is not conducive to the production of RJ-45 connector, can hold the twisted pair outer skin, hold the Nylon Wire and peel it off to the bottom of the outer skin to obtain a longer exposed line. ()

Step 2: twisted pair cable after wire stripping

Step 3: Perform the cabling operation. Place the orange pairs in the exposed twisted pair wires to the front of the wire, and the brown pairs to the front of the wire. The green pairs to the left and the blue pairs to the right ,. Upper: Orange left: Green lower: Brown right: Blue

Step 4: place the green and blue pairs in the middle, while the orange and brown pairs do not move, that is, place them outside ,.

Left one: Orange left two: Green left three: Blue left four: Brown

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