What are the main components of an IP address?

1. The concept of IP address.

An IP address is a 32-bit binary number that consists of two parts, a network ID and a host ID, that uniquely identifies a computer on the network. The network ID is used to identify the network segment in which the computer is located; The host ID is used to identify the location of the computer in the network segment. IP addresses are usually represented by 4 sets of 3-digit decimal numbers, with ".

Separate. Like what.

Supplement [IPv6]: The 32-bit IP address mentioned above is called IPv4, with the development of information technology, the number of available IP addresses in IPv4 has been unable to meet people's daily needs, according to the authoritative organization ** to fully apply information technology in 2010, each person needs at least 10 IP addresses, such as: computers, laptops, mobile phones and intelligent refrigerators.

To solve this problem, the IPv6 specification was developed, which uses 128 bits to represent IP addresses, which are represented as 8 sets of 4-bit hexadecimal numbers, separated by ":". For example, ab32:

33ea:89dc:cc47:

abcd:ef12:abcd:

ef12。

IP addresses are divided into Class A addresses, Class B addresses, Class C addresses, and private IP addresses

The eldest brother thinks it's the network number and the host number.

What is an IP address? I have heard the word IP address many times but I have not been clear what it is, I only know that the computer needs an IP address to access the Internet, in order to figure out this problem, I checked a lot of information, and I will share it with you below.

There are millions of hosts on the Internet, and in order to distinguish between them, people assign a special address to each host, called an IP address. Each host can be accessed through the IP address. The Internet Network Information Center (NIC) is responsible for the planning and management of Internet IP addresses. At the same time, the three network information centers of Inter NIC, APNIC and RIPE are specifically responsible for the allocation of IP addresses in the United States and other regions.

Dynamic IP: Because of the shortage of IP address resources, users who access the Internet through ** dial-up Internet or ordinary broadband Internet access generally do not have a fixed IP address, but are dynamically assigned a temporary IP address by the ISP. Ordinary people generally don't need to know about dynamic IP addresses, these are done automatically by computer systems.

The public address is the responsibility of the Internet Network Information Center (INTER NIC). These IP addresses are assigned to organizations that register and apply to Inter NIC. Direct access to the Internet through it.

A private address is a non-registered address that is intended for internal use within an organization. An IP address is made up of 32-bit binary numbers, i.e. 4 bytes, and each byte is made up of 8-bit binary numbers. In order to facilitate memorization, the decimal notation method is adopted, that is, the binary value of 4 bytes is converted into 4 decimal numbers, and the 4 segments of numbers are separated by a decimal point.

What does an IP address consist of?

An IP address is composed of four digits, separated by small dots, and each digit can range from 0 255 (including 0 and 255). It's in between. These four numbers are composed of two parts, the first part is called the network identity, and the latter part is called the host identity.

From this, IP addresses can be divided into three categories: A, B, and C.

Class A IP: *

Class B IP: *

Class C IP: *

The "*" above represents the network identity, "?".Represents the host identity. The network ID represents the public network that your computer network belongs to in the Internet, while the host ID determines the location of your computer in the public network.

If you are using a local area network, you can check the IP address and compare it with your neighbors.

There are a lot of knowledge points, and after you figure it out, you will understand what an IP address is and what a P address consists of.

What are the types of IP+ addresses and what are the characteristics of each?

Hello dear<>

The base group is divided into ABCDE5 classes, and each class 1 address is composed of two fixed-length fields, one of which is the network number net-id, which indicates the network to which the host (or router) is connected, and the other field is the host number host-id, which indicates the network number field of the host (or router) various addresses, net-id, 1,2,3,0,0 bytes respectively; The host-id of the host number is 3 bytes, 2 bytes, 1 byte, 4 bytes, and 4 bytes, respectively. Features: (1) IP address is a hierarchical address structure.

The advantages of two levels are: first, the IP address management agency assigns only the network number when assigning the IP address, while the remaining host number is assigned by the unit that obtained the network number. This facilitates the management of IP addresses.

Second, the router only groups according to the network number connected to the destination host (regardless of the destination host number), so that the number of items in the routing table can be greatly reduced, thereby reducing the storage space occupied by the routing table. (Actually, an IP address is an interface that identifies a host (or router) and a link.) When a host is connected to two networks at the same time, the host must have two corresponding IP addresses at the same time, and its network number net-id must be different.

This type of host is called a multihomed host(3) A number of LANs connected by ** devices or bridges are still not a network