How to perform IP address analysis and application

1. IP address

1. IPV4 is composed of 32-bit binary numbers

2. The IP address is composed of two parts: network bit and host bit

3. Classification of IP addresses:

Category Range Network bit and host bit

A A 1-126 Network host master

B             128-191   网网主主

C C​ ​ ​ 240-254 ​ Scientific research

2. Private network address

A A 10.0.0.0~10.255.255.255

B B 172,16.0.0~172.31.255.255

## C 192.168.0.0~192.168.255.255

3. Subnet Mask

Subnet mask is used to distinguish the network bits and host bits of the IP address

The network bit is represented by consecutive 1s, and the host bit is represented by consecutive 0s

172.16.100.100 255.255.0.0

192.168.180.180 255.255.255.0

10.22.22.22 10.22.22.22 255.0.0.0

4. Network ID (network number)

The IP of the network bit remains unchanged, and the host bit is represented by consecutive 0s.

172.16.1.1 .0.0

5. Network testing tools

1, ipconfig

2, ipconfig /all

3, ping

4, traceroute

6. Preparation for device configuration

1. Configure the console response time (the problem of returning to the initial interface after being idle for a period of time)

Global mode: line console 0

EXEC-TIMEOUT 0 0 The former is the minute.

overall mode: LINE CONSOLE 0

Logging Synchronous

## 3, Disable DNS Query

## completely

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