Original subtitles

1

And map subnet scanning.

2

So earlier we learned our own IP with a command if config and we scanned.

3

So how can we scan all the other eyepiece on our network.

4

In fact there are two different ways.

5

First we can write all of the threads one by one so that means one by one on the command line and map

6

10 0 dot to 1 and map 10 0 dot to dot to dot three all the way up to 255.

7

So as you can see this process will take quite a while.

8

So instead we can use a shorter and easier and map search we scan the IP information by subnet so for

9

this will type and map 10 dot 0 got to dot 0 slash 24 and press enter in that way and map will scan

10

all the threat from 10 dot zeroed out to about one all the way through ten dot Zero Dark two dot 255

11

in sequence OK.

12

So when do we talk about a subnet what is subnet so we've already said that ropes can be between 0 and

13

255 so let's talk a little bit more about this subnet or sub network is a logical subdivision of an

14

IP network the division of a network into two or more networks is called a subnet so computers belonging

15

to a subnet are treated with the same bit group in their IP address.

16

And what this does is results in an IP address logically divided into two fields the network number

17

or routing prefects and the remaining field or host identifier of the rest of field is an identifier

18

for a specific host or network interface.

19

The routing prefix can be expressed in the classless cross domain routing or S.L. TR representation

20

which is written as a first address of a network and then ends with the forward slash character and

21

the prefix bit length for example 10 does 0 2 does 0 slash 24 is a prefix of the Internet Protocol Version

22

for network starting at the given address with 24 bits allocated for the network prefix and 8 bit reserved

23

for host addressing so addresses in a range of 10 to zeroed out to date zero to 10 zeroed out to dot

24

255 belong to this network for IP for network can also be characterized by subnet mask or net mass.

25

So this is a bit mask which is bit wise to any IP on a network and one applied by the process.

26

It gives the routing prefix the subnet mass is also expressed in dotted decimal notation such as an

27

address for example 255 255 255 does zero that's the subnet mask for the prefix 10 dads zero 0 2 0 slash

28

24.

29

So when all virtual machines Kelly Linux log in open terminal and map then dot zero dot two dot zero

30

size 24 and press enter and what do you see here.

31

All the IP is in the network Ten dot 0 2 0 slash 24 were scanned one by one and the results are listed.