IP address, port address, network card address, the difference between the three

The NIC address is the MAC (Media Access Control or Medium Access Control) address, which is used to define the location of network devices. In the OSI model, the third layer network layer is responsible for IP addresses, and the second layer is responsible for MAC addresses. So a host will have a MAC address, and each network location will have an IP address that is unique to it.

The MAC address is determined by the network card, is fixed, and is unique. Figuratively speaking, the MAC address is like the ID number on our ID card, which is globally unique.

IP address refers to Internet Protocol address, which is the abbreviation of IP address. 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.

Start Run Enter cmd to pop up a window and then type ipconfig all gram to see the IP address and physical address.

Generally speaking, the physical address refers to the hardware address of the network card, which is generally solidified on the network card, and the physical address of no two network cards in the world is the same, and it is unique.

The IP address is the soft address assigned to the NIC by the network and can be changed.

To use an analogy, the physical address is your residential address, which is permanent, and the IP address is like your home ** number, which can be changed at will.

The network card address is the MAC address, generally represented by 12-bit decimal system, each network card is different, unique in the world, the first six digits are uniformly assigned to each manufacturer, and the last six bits are determined by the manufacturers themselves, IP addresses are generally divided into five categories of ABCDE, of which ABC three classes are commonly used, and 32-bit binary numbers are expressed.

The IP is used on the network card. It's like a door and a house number. IP is the house number. The network card is the door.。。

A network address is a logical address that a node on the Internet has in the network that can be addressed. The host address refers to the part to the right of the IP address that identifies the host itself.

The key problem in making the correct mapping of the host number to the MAC address is to use the subnet mask to determine or obtain the network address information of the remote host.

Today's IP networks use 32-bit addresses.

Expressed in dot decimal, such as:

The network address is assigned by ICANN (The Internet Corporation for Assigned Names and Numbers) of the Internet Society, and there are InterNIC for North America, Ripenic for Europe, and APNIC for Asia Pacific. Host addresses are assigned by the system administrators of each network. Therefore, the uniqueness of the network address and the uniqueness of the host address within the network ensure the global uniqueness of the IP address.

That's the two parts of the IP address, the network address first, and the host address last, which are distinguished and computed by the subnet mask. For example, if there is a subnet mask, then the network address is, and the host address is.

Network address refers to a certain IP address, for example: This is a class C network address, which is a segment, and supports 254 computers for another segment, and controls the number of computers at a segment of an address, which is a mask host address, which refers to the IP address of a computer, such as:

Check the network address, and the host address, mainly to see its subnet mask, for example, converted to binary, the first 24 bits are the network address, and the last 8 bits are the host address... I hope it will help you, study hard, and make progress every day.

The network address is equivalent to the area code of **, and different network ranges have different network addresses, also known as network numbers. IP is a specific network address. The router automatically assigns an IP

IP is the network ID card!

The router has an IP address, and the router has DHCP function! Just turn it on and you're good to go!

Hit the soy sauce, the first floor is already clear.