What is the actual address in the computer and what does it have to do with the IP?

The IP address is like your home address, and the network is like a post office, and your communication with others is data, and the network is the transmission of this data, and if you don't have an IP, you don't have an address, so how can the post office send you letters!

1. Whether it can be changed.

The IP address is a logical address and can be changed, while the physical address is a fixed address, which is fixed at the factory and cannot be changed.

2. Whether it is unique.

IP address, which is an Internet Protocol address, is not unique; The physical address is the fixed address on the network card of each computer, which is unique.

3. The main role is different.

IP addresses focus on the network layer, transporting packets from one network** to another; Physical addresses, on the other hand, focus on the data link layer, transporting a data frame from one node to another node on the same link.

4. The length of the two is different.

The IP address is 32 bits, divided into 4 segments, each with 8 digits, represented by decimal numbers; Whereas, the physical address is 48 bits and consists of hexadecimal numbers, which are divided into the first 24 bits and the last 24 digits.

5. The addressing protocol layer is different.

The IP address is applied to the third layer of OSI, that is, the network layer; The physical address is used at the second layer of OSI, which is the data link layer.

6. The distribution basis is different.

The assignment of IP addresses is based on the network topology, whereas the assignment of physical addresses is based on the manufacturer.

Encyclopedia-IP address.

Encyclopedia-mac address.

Distinguish. 1. Whether it has uniqueness is different.

MAC addresses (also known as physical addresses) are unique, that is, the MAC address of each hardware is fixed when it leaves the factory.

IP addresses are not unique, so it is very clear that the search application software is developed around MAC addresses and is not a fixed value.

2. The difference in the number of digits in length.

20:10:0a:

6c:8d is a MAC address.

The IP address is generally 32 bits long and is represented as four 8-octets separated by dots. For example, it is an IP address.

3. The implementation principle is different.

The MAC address is implemented by the hardware and works at the data link layer. The MAC address is usually the transmission data that is quietly stored by the EPROM of the network card manufacturer, and the MAC address is used to identify the computer that sends the data and the address of the host that receives the data.

IP addresses work at the network layer and above, assigning a logical address (i.e., IP address) to every network and each host on the Internet to hide the difference in physical addresses.

Contact. 1. The IP address and MAC address are linked together through the ARP protocol, and the data packets are transmitted thereby. The packets are then transmitted from the initial node, node by node, and finally delivered to the destination node.

2. The IP address can be bound to the MAC address to determine the only computer on the network. At present, computers are connected through the local area network and then through the switch and the network. This requires that the IP address and MAC address can be used in conjunction with the MAC address.

Each user is assigned a fixed IP address and then uses a MAC address to identify the user, which can better protect the corresponding information on the computer.

There are three differences between IP addresses and physical addresses, and DNS domain names (also known as domain name systems)., which is described as follows:

1. The uses of the three are different:

The essence of the two and three is different:2. The essence of the physical address: In the memory, the information is stored in bytes, and in order to store or obtain the information correctly, each byte unit is given a unique memory address, which is called a physical address, also known as the actual address or absolute address.

3. The essence of DNS domain name: a system that solves the problem of online machine naming. Just as visiting a friend is a prophet of how to get to someone's house, when a host wants to access another host on the Internet, you must first know its address.

3. The nature of the three is different:3. The nature of DNS domain name: it is a service of the Internet.

The IP address of the virtual address, for example, the IP address set by this computer can be set to any IP address, but the physical address is unchanged, and the hardware network card is fixed and cannot be changed.

An IP address refers to a network. IP address refers to the Internet Protocol address, also translated as the Internet Protocol 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.

IP address refers to the Internet Protocol address, also translated as the Internet Protocol 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.

The calculation process is as follows: the IP address and subnet mask are converted into binary, and then the calculation is carried out, and the result is the network address. And the operation is as follows, aligned up and down, 1 bit 1 bit is counted, 1 and 1 = 1, and the rest of the combinations are 0.

1) Convert the IP address and subnet mask to binary respectively.

Converted to binary is 11001010·01100011·10100000·00110010

Converted to binary is 11111111·11111111·11111111·00000000

2) Perform the two calculations.

3) Convert the result of the operation to decimal, which is the network address. 11001010·01100011·101000000·0000000 is converted into a decimal system.

1. Each IP address is composed of two parts: network number + host number. In this sense, an IP address is a hierarchical address structure.

Benefits of grading:

A. When the IP address management agency assigns the IP address, it only assigns the network number, and the remaining host number is assigned by the unit that obtains the network number. This makes it easy to manage;

b. The router is only grouped according to the network number connected to the destination host (the host number is not allowed to be considered), so that the number of items in the routing table can be greatly reduced, thereby reducing the memory occupied by the routing table, and checking the time used to find the route.

2. In fact, an IP address is used to identify the interface of a host or a router or a link. When a host is connected to two networks at the same time (e.g., a lab's server).

The host must have two corresponding IP addresses, which means that it must have two NICs.

3. The switch is a device on the data link beam and layer, and the hosts connected with it still belong to the same network. The hosts of different LANs must be connected through routers due to different network numbers.

4. All network numbers are equal.