What are the three basic functions of a router?

The basic functions of a router are: 1. Network interconnection; 2. Data processing; 3. Network management. A router is a hardware device that connects two or more networks and acts as a gateway between networks. Its function is to transfer data between different subnets.

The basic functions of the router are:

1. Network interconnection

The router supports various LAN and WAN interfaces. Mainly used to interconnect local area networks and wide area networks to realize communication between different networks;

2. Data processing

Provides packet filtering, packet forwarding, priority, multiplexing, encryption, compression and firewall and other functions;

3. Network management

The router provides functions including router configuration management, performance management, fault tolerance management and flow control.

Related introduction:

A router is a hardware device that connects two or more networks. It acts as a gateway between networks. It reads the address in each data packet and then decides how to transmit it. Dedicated intelligent network equipment. It can understand different protocols, such as the Ethernet protocol used by a local area network and the TCP/IP protocol used by the Internet.

In this way, the router can analyze the destination addresses of data packets from various types of networks, convert the addresses of non-TCP/IP networks into TCP/IP addresses, or vice versa; and then based on the selected routing algorithm Send each data packet to the designated location according to the best route. So the router can connect non-TCP/IP networks to the Internet.

The function of a router is to transmit data between different subnets. The specific functions are as follows:

(1) Realize the interconnection of IP, TCP, UDP, ICMP and other networks.

(2) Process the data. It can send and receive data packets and has various functions such as packet filtering, multiplexing, encryption, compression and protection wall of data.

(3) Select the next transmission destination of the data packet based on the information in the routing table.

(4) Exchange topology information between the external gateway protocol and other autonomous domains.

(5) Implement network management and system support functions.

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