How do computers communicate in a local area network?

You're talking about information between computers.

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Feiqiu, it can be better, or it can be chatted, which is equivalent to the offline version of QQ

Buy a dual-WAN router, configure the interface FA0 1 IP Add to connect to the PC:

Configure interface fa0 2 ip add to connect to PC:, and it will be interconnected by default.

If the WAN port and LAN port are not connected to the network segment IP, the NAT IP of the router cannot be accessed to the device on the other side of the WAN port.

Buy a Layer 3 switch and manually set the routing tables in the switch to link with each other.

However, a Layer 3 switch** can be more expensive than your 2 computers.

Ordinary home routers have routing functions, and the routing table can be set to route communication in different network segments, as an example:

Route A WAN port, LAN port.

Route B WAN port, LAN port.

The line coming out of the LAN port of A is connected to the WAN port of B, in this case, the computer connected to the AVAN port cannot ping the computer under the LAN port of Route B. The basic function of the router is to connect two networks, so that the two network segments connected can be connected to each other, so the computer under the WAN of Route A can ping the computer under the LAN port of Route A. However, Route A does not know about this network, so it cannot ping the computer under the LAN port of Route B, so it needs to do a static route under Route A.

b route.

Computer network communication via protocol.

1. First of all, you need to use the physical layer protocol to define the media type and, the shape and size of the interface, the definition of pins, and the driving mode.

2. The second data link layer protocol defines the format, size, verification, physical addressing and other information of the data frame.

3. Constitute the basis of computer communication, the physical address can be theoretically unique in the world, it does not have the concept of "domain", so that the world's computers are in a flat structure of the network, to be logically addressed through the upper-layer protocol is usually the IP protocol, and other protocols are used to optimize and reuse the problems encountered in the use of the characteristics of computer applications.

Communication through various protocols, exchanging information on different layers, you can take a look at the book Computer Networks.

1.Set up the virtual machine NIC as a bridge.

To put it simply, virtual machines use a bridged network pattern.

See, there is a problem with your network settings, do you use net? It is advisable to change one, such as bridging!

If you're using a laptop, there's a wireless switch. Generally, it can be turned on by the button of FN + a wifi icon.