2. WAN port refers to the WAN interface, which is mainly used for routers to connect to the WAN. Common wan interfaces include E 1, V.24, V.35, ATM and POS interfaces.
(1)E 1: It belongs to the common interface of narrowband WAN, generally 64k-2Mbps, and adopts RJ45 and BNC interfaces.
(2)V.24: It belongs to the common interface of narrow-band WAN, and the external network end is a 25-pin connector, which is often connected with a low-speed modem.
(3)V.35: It belongs to the common interface of narrow-band WAN, and the external network end is a 34-pin connector, which is often connected with high-speed modems.
(4)ATM: it belongs to the common interface of broadband wide area network, and uses optical fiber interfaces such as LC or SC, with common bandwidths of 155M and 622M.
(5)POS: it belongs to the common interface of broadband wide area network, using optical fiber interfaces such as LC or SC, and the common bandwidths are 155M, 622M, 2.5G, etc.
3. The difference between LAN interface and WAN interface:
(1) LAN broadband router has different network cable connections between WAN port and LAN port. Insert the access network cable provided by the network operator into the WAN port, then connect several computers with Internet access to the LAN port, and use one computer to log in to the management interface of the router for corresponding configuration, so that * * * can surf the Internet as much as possible.
(2) The transmission process of network data in WAN port and LAN port is different. When a machine in a network sends a packet to an external network, it first sends a request to the default gateway (that is, the broadband router). When analyzing the IP address of the intranet in the packet, the router will check the NAT address translation table of the device itself. After finding the corresponding entry, the IP address of the WAN port will be used to communicate with the external network.
Extended data
Specific universal LAN interface:
1, AUI: It is a LAN interface for connecting thick coaxial cables. It is a D-type 15 pin LAN interface and one of the more common ports in token ring network or bus network. Routers can connect to 10 Base-5 network through thick coaxial cable transceiver, but more often they connect to 10Base-T Ethernet through external transceiver.
2.SC: The so-called fiber port is used to connect optical fibers, which are usually connected to switches with fiber ports such as fast Ethernet or Gigabit Ethernet. This port is labeled "100b FX".
3.RJ-45 is a common twisted-pair Ethernet port. Because twisted pair is mainly used as the transmission medium in fast Ethernet, RJ-45 ports can be divided into two types according to different port communication rates: RJ-45 port in 10Base-T network and RJ-45 port in 100Base-TX network. These two RJ-45 ports are exactly the same, but the corresponding network circuit structures in the ports are different, so they can't be connected casually.
The RJ-45 port of (1) 10ba se-T network is usually identified as "ETH" in the router.
(2) The RJ-45 port of100base-tx network is usually marked as "10/00btx". This is mainly because most fast Ethernet router technologies are still suitable for the bandwidth of 10/ 100Mbps.
local area network interface
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