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

IP address: devices that need to surf the Internet must be equipped with an IP address.

The IP address is the same as the name of everyone in the human world and must be configured

The configuration of each numeric value in the IP address must be between 0 and 255

Note:

The network devices connected through the switch are all on the same network segment.

Function:

Within a certain range, the only one that represents a network device

Indicates:

Binary-11111111 11111111 11111111 1111111111 32

Dotted decimal-xxx.xxx.xxx.xxx; is a decimal system, representing 8 binary

/ n (n represents the number of 1s in the subnet mask)

Structure:

Network bit + host bit

Special IP address:

Network address: host bits are all 0: indicates a range

Broadcast address: host bits are all 1: indicates all hosts in a network segment

Subnet mask:

Function: to distinguish between network bits and host bits in IP addresses

How to make a distinction:

I: the subnet mask is the same length as the IP address

Ii: the bit in the IP address corresponding to the 1 in the subnet mask, called "network bit"

Iii: the bit in the IP address corresponding to the 0 in the subnet mask, called "host bit"

Features:

1. The left side is always 1, and the right side is always 0

2, 1, and 0 never cross.

Classification: default subnet mask

1. Class A 1166net + main 255.0.0.0

The previous bit is 0

0000 0000-0

0111 1111-127

2. Class B 128191net + network + master 255.255.0.0

The first two bit are 10

10 00 0000-128

10 11 1111-191

3. Class C 19223 network + main 255.255.255.0

The first three bit are 110,

1 0000-192

110 1 1111-223

For multicast and scientific research:

4. Class D 2240239 Multicast

5. Category E 240,254 scientific research

I

The significance of computer decimal to binary conversion:

You can accurately determine whether two IP addresses exist in a "network segment".

You can accurately determine whether an IP address is available (can be configured on the device)

The significance of computer binary to decimal conversion:

It is convenient for people to configure and manage IP addresses.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.