1-1 Classification of computer networks

First, by the scope of coverage

1. LAN (lan-local area Network)--the foundation of metropolitan Area Network and WAN

Range: Dozens of M-thousands of M

Capacity: Several units-thousands of computers

2. Metro (Man-metropolis area Network)-Includes multiple LANs

3. Wan (wan-wide area Network)-internet

II. topological structure-the link structure of the network

1. Bus type: Features: A site failure will not affect the entire network, but if the transmission media failure will cause the entire network to be paralyzed, using a way to share the bandwidth.

2. Ring Type: Features: Easy to install, but limited capacity, components into the network, it is difficult to add new sites

3. Star type

4. Tree type

Third, press the transmission medium

1. Twisted pair (effective transmission distance -100m)

Straight line: links to different devices

such as: computer (PC)-Switches (switch)

Switch-Router (Router)

Cross line: Link to the same device

such as: pc-pc Switch-switch router-router

Full Anti-line (console line): Configure switches and routers, typically 2m.

2. Coaxial cable

3. Light

4. Wireless network (using microwave, infrared transmission)

Four, the simulator related note record

1.rs232-is used to configure routers and switches, that is, the interface of the console line, the general PC does not, the actual situation requires the use of USB to RS232 Port line.

2.fastethernet-Fast Ethernet

1-1 Classification of computer networks