Subnet, subneting(서브넷,서브넷팅)

SubNeting ?

   - IP를 좀더 세분화 하여 관리 하는 것

 

예제 2개의 네트워크로 나눈다면?

major Network 192.168.1.0/24

IP주소대역 : 192.168.1.0 ~ 192.168.1.255

-

subnet1 128개  192.168.1.0 ~ 127

   network address 192.168.1.0

   broadcast address 192.168.1.127

subnet2 128개 192.168.1.128 ~ 255

   network address 192.168.1.128

   broadcast address 192.168.1.255

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예제

Major Network 210.57.6.0/24 를 서브냇 8개로 서브넷팅하세요

각 처음 network / 마지막 broadcast

210.57.6.0~31            1~30           

210.57.6.32~63           31~62

210.57.6.64~95           65~94

210.57.6.96~127         97~126

210.57.6.128~159          129~158

210.57.6.160~191         161~190

210.57.6.192~223          193~222

210.57.6.224~255           223~254

서브넷마스크 /27 

 

예제2

major network 127.17.0.0/24 를 ip 62개 필요한 네트워크가 있다.

127.17.0.0~63           사용가능한      1~62 

network address 0 / broadcast address 63                                      

127.17.0.64~127         사용가능한   65~126

network address 64 / broadcast address 127

127.17.0.128~191       사용가능한   129~190

network address 128 / broadcast address 191

127.17.0.192~255      사용가능한     193~254

network address 192 / broadcast address 255

 서브넷마스크 /26

 

예제3

Major Network 200.1.2.0/24

A network ip 50개    200.1.2.128~191 /26

B network ip 100개  200.1.2.0~200.1.2.127 /25

c network ip : 30개  200.1.2.192~223 /27

d network ip :4개    200.1.2.224~231 /29