Can I use 2 NICs at the same time?

Yes! There are at least three network card slots on the motherboard! As long as the IP address is different, it's fine! Non-conflicting.

Yes, you can set the IP separately

Teach you to use a computer dual network card, and access the company's intranet and extranet at the same time, so as not to be discovered by the information department.

The steps are as follows:

1. First of all, set the attributes of one of the network cards, and fill in the information such as IP and gateway.

2. Configure another NIC but do not fill in the gateway and leave it blank. Then run cmd and enter the command "route -p add, intranet CIDR block, mask subnet mask, private gateway" in it.

3. Finally, check the intranet gateway again, and delete the gateway if there is one. At this time, you should be able to access different network cards according to different **. DNS can be filled in two, one for the internal network and one for the external network.

Two NICs can work at the same time, and multiple NICs can also work at the same time.

But setting up two gateways at the same time is not a no, only one of them will work.

Two network cards and two gateways mean that there are two exits for data to go out of the computer. If only one gateway is set, it means that all data goes through exit 1; Just setting up another gateway means that the data goes from exit 2. When two gateways are set up at the same time, the problem comes, the computer is not a human being, it will only follow the set rules, and the rules that determine the network data exit are"Routing tables"Setting up two gateways at the same time means setting two default routes in the routing table at the same time (the default route is that the rest of the data specified in other routes in the routing table are selected according to this route).

When the first default route is checked, the data is emitted, and the second one does not work. So it feels like there's only one network card working. In fact, packets that are on the same network segment as the two gateways will still be sent correctly.

Errors occur across network segments.

There can only be one gateway, and a routing table needs to be set up for cross-segment communication with another NIC to achieve the purpose.

The routing table is like a travel route map, and the network card is specified by him where to go.

The first thing you need to know when setting up a routing table is which destinations and which exits should be taken, that is, the network card.

The destination is the IP of the ** where the data needs to arrive, and the IP of the computer. Aggregate the IP addresses of an egress into one or more IP segments, and configure one or more routes based on the summarized IP segments. In this way, you can use two or more network cards to access the Internet at the same time.

If you want to understand the specific settings of routing, it will take some time to learn.

You need to work in different domains to use the two NICs at the same time. Normally, one works on the external network and the other works on the LAN composed of two machines. And set one of the machines as the master, that is, the server, and the other as the slave.

You try a cerebellum to control two hearts

One will be automatically deactivated before opening two, first of all, this needs the south bridge chip in the motherboard to control and connect the network card and the hardware of the computer. It is estimated that your motherboard will not have two Southbridge chips at this time. Most importantly, it doesn't make sense.

Two network cards do not significantly improve the network speed. And this requires internal support from the computer.