Subnet mask is also called network mask, address mask and subnet mask. It is used to indicate which bits of an IP address identify the subnet where the host is located and which bits identify the bit mask of the host. The subnet mask cannot exist alone. It must be used in combination with the IP address. The subnet mask has only one function, which is to divide an IP address into two parts: network address and host address. The subnet mask is the basic knowledge that everyone who uses the Internet must master. Only by mastering it can you truly understand the TCP/IP protocol settings. Let's explain what subnet mask is in simple terms.

AirPods are a line of wireless headphones produced by Apple and are widely popular. Although airpods are waterproof, they are not completely waterproof.

Cell phone battery is an important part of the phone, and its life and capacity directly affect the experience of using the phone. So, how should we charge the phone properly?

Laptop temperature is too high will lead to switching or open the program relatively lag, serious will make the computer blue screen or automatic restart.

Fear of oversleeping at work, or fear of missing a date with friends, we will habitually set an alarm clock on the phone every few minutes. The list of alarms is not enough to fill the screen, so you can't sleep with peace of mind.