Division of subnet mask 2

# talking about the division of subnet mask, in fact, it was written last time

# Last time, it was about dividing a large network into several small networks. Today, it is about turning a small network into a large network segment.

# example: if a company now has a 300 computer terminal, the network equipment is a router and a stupid switch, and now 300 computers need to be divided into the same network segment

# first of all, we will definitely think of the class c private address, as we all know, it defaults to 192.168.0.0-192.168.255.255 / / this is the range

Subnet mask: 255.255.255.0

# A network segment defaults to 256 hosts and 254 are available, so we don't have enough addresses

That's the point: then we need to borrow one bit from the Internet:

The host bit becomes 2 to the 9th power, with a total of 512 hosts, which fully meets the above requirements, and the network bit becomes 32-923.

So: the ip address, and the subnet mask become the following:

192.168.00000000.00000000 / / IP address

255.255.11111110.00000000 / / Subnet Mask

When the network bit decreases by one bit, the host bit increases by 2 to the power of n segments / / this is my own summary.

N represents the number of borrowed digits, and borrowing a bit represents a host with an increase of 2 to the power of 1, but the hosts of both segments are on the same segment because their masks are both

255.255.254.0

The network segments it has added are

192.168.00000000.00000000-192.168.00000000.11111111

192.168.00000001.00000000-192.168.00000001.11111111

The conversion to decimal are:

192.168.0.0Muray 192.168.0.255 / / this is the ip address range.

192.168.1.0--192.168.1.255

The subnet mask is converted to decimal:

255.255.11111110.00000000

255.255.254.0

Description: 192.168.0.0 / 23-192.168.1.0 / 23 is the same network segment

Examples are as follows:

The IP addresses in the figure above are 192.168.0.1 255.255.254.0 and 192.168.1.1 255.255.254.0, respectively.

As shown in the following figure:

# because they are on the same network segment, there is no gateway address. Their gateway can be set freely between them, any ip address can be used.

# Verification and testing: ping 192.168.1.1 is shown below:

# the above figure shows that they are on the same network segment and the test is successful

_

End

That's all for today. Today's experiment hasn't been finished yet.