Shulou(Shulou.com)06/02 Report--

II. TCP/IP protocol

1. TCP/IP communication protocol is the most complete and widely supported communication protocol at present. It allows computers with different network architectures and different operating systems to communicate. It is the standard communication protocol of Internet.

2. Three elements of communication between the host and the host

IP address (IP address)

Subnet Mask (subnet mask)

IP routing (IP router)

3. IP address

1. Function: the network address used to identify a node

2. Composition: 32 bits, represented by 4 decimal numbers, used in between. Separate

Network bit + host bit

3. Classification:

A 1 ~ 127 network + master

B 128 ~ 191 network + network + master + master

C 192 ~ 223 network + master

D 224 ~ 239 Multicast (Multicast)

E 240 ~ 254 scientific research

4. Default subnet mask

Class A 255.0.0.0

Class B 255.255.0.0

Class C 255.255.255.0

5. Gateway

It is the "gateway" at which one network is connected to another.

6. Public IP address and private IP address

Public address, also known as public network address, through which direct access to the Internet, it is within the scope of the wide area network.

Private address, also known as private network address, is used exclusively within the organization. It is within the scope of the local area network, and the Internet cannot be accessed outside the local area network.

Private address range:

Category A 10.0.0.1 ~ 10.255.255.254

Category B 172.16.0.1 ~ 172.31.255.254

Class C 192.168.0.1 ~ 192.168.255.254

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