Shulou(Shulou.com)06/02 Report--

1. Classification of network cables: most enterprises now use:

Cat5 (Category 5), cat5e (over Category 5), cat6 (Category 6)

Five types of network cables: mainly used for 100-megabit networks

Six types of network cables: mainly used for gigabit networks

two。 Based on transmission speed and anti-jamming ability, it can be divided into:

Five categories: 100mbps

Six categories: 1000bgps

3. Network cables are classified by type:

Shielded wire, and unshielded cable:

Shielded network cable: strong anti-electromagnetic infection ability, it is fully shielded, ordinary enterprises rarely use, because it in the enterprise network wiring, any kind of terminal equipment must be fully shielded.

Unshielded wire: it uses 8 different color wires wound together to reduce anti-interference ability and electromagnetic radiation as much as possible. It is widely used in general enterprises or families because of its low cost.

4. Network cables are classified according to line order:

Through line

Crossover line

Reversal line

Straight-through line: used to connect two different network devices

Cross line: for the connection of two identical devices

Reversal line: generally used to debug switches and routers with console ports

The wire sequence of the network cable is: T568b: orange white. Orange, green, white and blue, blue, white and green, brown, white and brown,

T568a: in t568b, switch 1, 3 and 2, 6 respectively

It's the line sequence of t568a.

Transmission of network cable: 1Jing 2 send, 3.6 accept

In ordinary small businesses or households, because it is a 100-megabit network, there are usually only four lines when connecting the network.

They are: 12, 36

But in a gigabit network, all eight lines must be connected.

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