IP address encoding methods principles and classification

In order to provide the necessary flexibility for networks of different sizes, IP address designers divide the IP address space into five different address categories, as shown in the table below, with three categories A, B, and C being the most commonly used:

Type: Range, Network Bit, Host.

Class A: 0 126, 8-bit, 24-bit.

Class B 128 191 16-bit 16-bit.

Class C 192 223 24-bit 8-bit.

Class D 224 239 multicast address.

Class E 240 255 for retention test use.

Network numbers are assigned by the Internet Authority in order to ensure the global uniqueness of network addresses. Host addresses are assigned by the 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.

For example: Converted to binary 11001010 01100011 10100000 00110010 classified as a Class C address according to the above The first 24 bits are network bits, and the last eight bits are host bits.

I don't give the answer. Let's learn IPv6. You'll use this for the rest of your life. What else does it mean to be a white. What do you mean. I am also Xiaobai (surname Bai).

1. The dot decimal system, the full name of the pants branch dot fraction (dot) decimal notation, is the IP address identification method of IPv4. In IPv4, an IP address is represented by four bytes, and each byte is expressed as 0 255 in decimal system. The dotted decimal system uses four numbers from 0 to 255 to represent an IP address.

2. Network endianness, in the actual network transmission, the data is transmitted according to a group of 32-bit binary numbers, due to the influence of the storage order, the actual byte transmission order is the transmission order from the high-level byte to the low-bit byte. The address in the network byte order format is unique regardless of the host, router type, and its representation is unique.

3. Host endianness, as the name suggests, the format of the IP address is related to the specific host or router. For different hosts, there are different formats for storing IP addresses, for example, for Motorola68K series hosts, the HBO and NBO are the same. In the case of the Intelx86 series, HBO and NBO are the opposite.

Introduction to IP addresses

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

A, B, C, D, E five categories, personal IP is mainly A, B, C three kinds, these three types of IP, respectively, there is a piece of wire mesh address, used for local area network use. Class D is a multicast address, and E is reserved for R&D use. Now the routing technology has classless inter-domain routing, so addresses are generally classified according to the standard five types of IP address masks.

The division of subnets allows for the further division of class-based IP networks into smaller networks in order to achieve smaller broadcast domains and make better use of each bit of the host address.

A, B, C, D, E five categories, upstairs has been said, personal IP is mainly A, B, C three kinds, these three types of IP, respectively, there is a piece of wire mesh address, used for local area network use. Class D is a multicast address, and E is reserved for R&D use. Now the routing technology has classless inter-domain routing, so addresses are generally classified according to the standard five types of IP address masks.

I don't understand what you mean, IP has intranet IP and external network IP, and the intranet IP is divided into different network segments, there is no classification, and the subnet mask is generally.

A, B, C, D, E five categories, commonly used A, B, C three categories, A class mask Class B - mask Class C mask.

An IP address consists of two parts, the network number and the host number. However, it is necessary to compare the bits with the "subnet mask" in order to distinguish which are network bits and which are host bits.

IP address.

Type first byte.

Decimal range binary.

Fixed highest-bit binary.

Network bit binary.

Categorical IP addresses: IP addresses are divided into several fixed classes, each of which consists of two fixed-length fields. Network ID + Host ID = IP address of the classification.

The first field is the net-id, which identifies the network to which the host (or router) is connected. A network number must be unique across the Internet.

The second field is the host-id, which identifies the host (or router). A host number must be unique within the network range indicated by the network number that precedes it.