The computer cannot access the Internet at the same time, and the laptop does not support LAN

The first floor speaks and is concrete! I won't say it!

This usually refers to a notebook that does not have a wired network interface.

A local area network (LAN) on laptops and computers refers to a group of computers that are connected by multiple computers in a certain area. "An area" refers to the same office, the same building, the same company, the same school, etc., usually within a radius of several kilometers.

A local area network is naturally a regional network formed in a local area, which is characterized by a limited range of distribution areas.

It can be as large as a connection between a building and an adjacent building, or as small as a connection between offices. Compared with other networks, the LAN itself has faster transmission speed, more stable performance, simple framework, and is closed, which is why many organizations choose it.

The laptop supports LAN, but the computer's built-in security center turns it off, and you can open it manually.

Laptops are LAN-enabled. You need to have multiple computers all under the same workgroup and all on the same network. This will allow you to connect to the local area network.

1. First of all, remember to prohibit the MAC address of the computer's network card, and enter it in the cmd command line according to the command in the figure.

2. Then log in to the router and enter the administrator name and password.

3. In the settings page, we need to switch to the Firewall Settings tab.

4. Then we need to enter the MAC address filter page.

5. Here we click on the reject mode.

If you set up the IP address and MAC address in the Internet behavior management, then there is no way, you still have to enter the device to modify the settings, if there is no binding, you can try to fix the IP method yourself, set the IP to, DNS if it is telecom.

How many computers under the same router can and may not have Internet access?

Does your router have a VLAN, and is it a VLAN? Otherwise, it is impossible to automatically assign addresses from two network segments under the same router.

Or you can try to manually set the IP of the computer that can't access the Internet to a segment to see if you can access the Internet!

This access method should be connected to a switch under a router, and then connected to a small router, switch, and computer.

Some computers under the small router can access the Internet, and some cannot access the Internet, for several reasons:

1. The number of devices (computers) under each router is theoretically unlimited, but in actual use, the number of small home routers with machines is about 10, because the processing capacity is limited.

2. Manually assign an IP address range.

3. The access mode of all small routers is to enter the WAN port and exit from the LAN port, and the IP address of the exit of the small router should not be in the same address segment as the big router.

4. Check whether there is an ARP attack in the LAN, the ARP attack in the LAN will cause some machines in the intranet to not go to the network, and the correct gateway and DNS cannot be obtained. This is the most likely situation, but it is more difficult to check, and after finding out, redo the system, and the antivirus does not work.

Set it to a specified address and try it in the network segment where you can access the Internet.