IPV4 Theoretical Knowledge 3----classification address two level addressing

IPV4 Theoretical knowledge 3---- classification address two level

addressing

Objective

This time is mainly to explain the content of IPV4 , because this aspect of the content is more important , I do not agree to the article introduced , a little bit of knowledge dot a content that does not seem to be messy . If there is a problem , please correct me . .

Level two addressing

When classifying addresses,all addresses in the same network belong to the same address block,and each address block consists of two parts:NetworkIDand HostID.NetworkIDWhat are you doing here ??Do you remember??HostID??still remember0533-88888888which case??NetworkIDindicates the network,HostIDindicates a specific host that is connected to the network.Isn't that right ?.describes the classification address of aIPV4Address.

is a two-level address in the classified addresses

Number of extracted addresses,First Address,End Address

an address block is an address If any one of the address blocks is given a ipv4 address How to draw the ip address number of Address block first address See below : three steps

1. The address number of the address block N can be used n=2 32-n The second side to find out .

2. Ask for first address , We keep the left n position unchanged , and will be on the right side of the 32-n bits are all set to 0

3. Ask for an end address , We keep the left-most n -bit unchanged , and the 32-n bit on the right is all set to 1.

Summarize

This is not a lot of content, I hope that people like me to remember , the memory of the dead things to remember . Damn, remember, rote . !

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IPV4 Theoretical Knowledge 3----classification address two level addressing