How IP addresses divide network addresses into host addresses

This is a classless address. The host address has a C (how do I put it, that is, 254 available. Remove the network address of 0 and the broadcast address of 255).

Introduction to Class A addresses.

The first byte of a Class A address is the network address, and the other three bytes are the host address. In addition, the highest bit of the first byte is fixed at 0.

To is reserved for the address, which is used for cyclic testing.

Class A private address.

In Class A addresses, to is a private address (the so-called private address is an address that is not used on the Internet, but is used in a local area network).

Introduction to Class B addresses.

1) The first and second bytes of the Class B address are the network address, and the other two bytes are the host address. The first 2 of the other 1 byte is fixed at 10

Reserved addresses in Class B addresses.

To is a reserved address. If your IP address is automatically obtained, and you do not find an available DHCP server on the network, you will be given an IP address from the middle of the network.

Class B private address.

In a Class B address, to is a private address.

Introduction to Class C addresses.

The 1st, 2nd, and 3rd bytes of a Class C address are network addresses, and the 4th byte is the host address. In addition, the first three digits of the first byte are fixed at 110.

Class C private address.

In a Class C address, to is a private address.

Not all of them are classless addresses according to this standard.

is a Class A address.

Convert the IP address and subnet mask to binary and compare, the IP address corresponding to the subnet mask is 1, the IP address part is the network address, and 0 is the host address. For example.

There is no difference between a network address and an IP address – the address of the Internet (network address) is represented by a number and is called an IP address. The host address is also an IP address in simple terms.

The first byte of a Class A address represents the network address, and the last three bytes represent the address of the computer in the network. The first two digits of a Class B address represent the network address, and the last two bits represent the address of the computer in the network.

The first three digits of a Class C address represent the network address, and the last one digit represents the address of the computer in the network. Class A addresses are used for very large computer networks, followed by Class B addresses, and Type C addresses are used for small networks.

Divide network bits into host bits

1. The part of the IP address corresponding to subnet mask 1 is the network bit, and the part of the IP address corresponding to subnet mask 0 is the host bit. That is, ip = 32 bit = network bit + host bit = 4 * byte

When the more binary bits are assigned to a host number, the more hosts can be marked, and the fewer networks can be identified, and vice versa.

3. Most of them distinguish network bits and host bits by subnet masks, subnet masks correspond to IP addresses one by one, and subnet masks of 1 are network bits and 0 are host bits.

4. Examples: such as: masks. Network bits The host bit is 2.

<> network bits are used to determine the network, which is equivalent to which region you live in.

The host bit is the IP address used by each computer, which is equivalent to how many people are in your area and everyone's fixed residence.

A complete IP address is composed of a network address and a host address, and the network address is an identifier that distinguishes network segments.

If you want to divide it into 3 subnets look at the following:

First, you need to look at how many machines are in each subnet.

If you have 50 machines in your first subnet, you need to calculate like this.

How many powers of 2 - 2 is greater than or equal to 50

2 to the 6th power = 64-2 = 62].

In this way, it seems that the last 6 bits should be used as the host number.

This is the subcode. Here's IP:

The gateway is:Extended Materials

The specific calculation method is as follows:

Convert both the IP and subnet masks to the binary of 32, perform the calculation, and the result is the network address or subnet address of the IP. The characteristics of the AND operation are: if there is 0, it is 0, and all 1 is 1.

The specific process is as follows:

11001010 --202 binary representation.

11111111--- binary representation of 255.

11001010--- and the result of the operation = 202

Binary representation of 01110000---112.

11111111--- binary representation of 255.

01110000--- and the result of the operation = 112

Binary representation of 00001110---14.

11111111--- binary representation of 255.

00001110--- and the result of the operation = 14

10001001--- binary representation of 137.

Binary representation of 11100000---224.

10000000--- and the result of the operation = 128

Therefore, the IP address of a host is the IP address of the victim, the network address of the mask is yes, and the subnet number is 128. The collapse site of the main engine is Bi section.

An IP address is an identifier used to uniquely identify a computer on a network. An IP address consists of 32 binary digits, usually represented by 4 decimal numbers, each ranging from 0-255. Among them, the prefix bit in the IP address is the network bit, and the suffix bit is the host bit, and the difference between the two is as follows:

In network communication, sending data needs to be relayed through network devices such as routers, and these devices are based on the network number. Therefore, the values of network bits must be the same in the same network.

2.Host bit: The suffix bit in the IP address is used to identify the host number, which is used to identify different Qingsan source hosts in the same network. The value of the host bit must be unique within the same network in order for the network device to properly transmit the data to the specified host.

In an IP address, the number of bits of the network diggings and the host bits depends on the subnet mask of the IP address. The subnet mask defines the dividing line between network bits and host bits and determines which bits in an IP address are network bits and which bits are hosts. Typically, the network bit in the subnet mask is a continuous 1 and the host bit is a continuous 0.

Understanding the network bits and host bits in an IP address is important for the design and implementation of network communications, and can help us better understand how network communication works and how it is implemented.

Like what you mentioned.

A network address is a part of an IP address that represents a subnet.

The IP address is associated with a ** number, the network address is equivalent to the first few digits of the area code, and the host address is equivalent to the last few ** numbers.