Why different IP addresses will be the same

The landlord wants to ask why the same address IP will be different!

In fact, at present, we all use dynamic IP to surf the Internet, not a fixed IP, so the IP address will be changed after disconnection and reconnection! But the IP range is still the same (generally nothing has changed). That is, the first two digits of the IP are basically unchanged, and the last two digits are changed.

Because the IP range assigned to a region is fixed.

This question seems incomplete. Because IP, in fact, refers to the IP address. Is it to ask different IPs, will the address be the same? Actually, if that's the case, it's the same as having the same MAC address for different IP addresses.

Media Access Control (MAC), also known as MAC addresses and hardware addresses, is used to define the location of network devices. Each NIC has a specific MAC address, which is unique by the physical address of the NIC, and the MAC address of each NIC is different and unique.

IP address is a unified address format provided by the IP protocol, which assigns a logical address to every network and each host on the Internet to mask the difference in physical addresses.

Under normal circumstances, computers or other devices that need to be connected to the Internet (such as mobile phones) have at least one network card or unit similar to a network card, and these network cards or units have a MAC address, and the MAC address is fixed and unchanging.

In order for a computer or mobile phone to be connected to the Internet, it needs an address, similar to a house number, in order to accurately send information from that address, or to receive information from other computers or mobile phones, without mistakenly transmitting it to another place. In this way, every device that goes online needs an address, that is, an address that abides by the IP protocol, which is the IP address.

In general, for LAN, since each network device on the network is fixed, the network administrator assigns a fixed IP address to each network device, so that the same IP address can only correspond to the same MAC address.

For the Internet, because IP address resources are limited, and the total number of network devices (such as computers and mobile phones) that need to be connected to the Internet often exceeds the IP addresses that can be allocated, network operators adopt the method of dynamic allocation of IP addresses. When your device is turned on and needs to be connected to the Internet, the network will immediately assign an IP address, and during the time the device is connected to the Internet, the IP address is only used by the network device. If the device is disconnected from the network, then the IP address may be assigned to another network device.

Therefore, every time a network device connects to the Internet, it will have a different IP address. Since the MAC address is fixed, there will be different IP addresses corresponding to the same MAC address.