The rule "parallel devices use anti-cables for different devices" should be well understood.

 

"Parallel cabling for different devices for devices"This rule is the line rule for establishing a network, but it must be understood.

The general Nic is still correct according to this rule, but when you encounter a notebook adaptive Nic, pay attention to it.

Why?

Note that computers usually have built-in wireless and wired NICs. Although wireless network data transmission has become the mainstream, I still like to use the wired Nic for data communication when I have an Ethernet network, first, wired network data communication is more secure and reliable, and second, bandwidth can be well guaranteed. The built-in network adapter of the laptop becomes a "network adapter" in windows. Its English name is "network interface card ". The NIC is one of the components required for data communication in a laptop. No matter the twisted pair ethernet cable, coaxial cable, or optical fiber, the NIC must be used for data exchange.

Currently, mainstream laptop built-in NICs usually have 100 Mbps of bandwidth, and high-end laptop NICs have Mbps of bandwidth. Of course, there are also Mbps of adaptive NICs, the speed of the network adapter depends on the bandwidth of the network device connecting the other end. If the other end is connected to a m network device, the network connection will be switched to a m physical connection rate.

It is worth mentioning that at present, Most laptop built-in NICs Support automatic adaptation of RJ45 568a and 568b in Two-line sequence, which makes it very convenient to create and find Ethernet connection cables, you don't have to worry about making RJ45 parallel lines or cross lines.

Therefore, the built-in ethernet card is still one of the important configurations of the laptop, it is best to select a laptop with built-in high bandwidth and support for two-line automatic adaptation to the function Nic.