Subnetting

Subnetting

1. Subnetting is the process of breaking down an IP network into smaller sub-network called 'subnets'.

2. Network devided into small sub-network is for :
- easy to handle it
- high performance
- low broadcast
- high network
- low data collision

network example : 192.168.1.66/26 = IP
255.255.255.192 = Subnet mask

3. Each subnet is non-physical description ( ID ) for a physical sub-network( usually a switched network of host containing a single router in a multi-router network).

Soalan :

i) Cari bilangan host :
= 192.168.1.66/26 = 1100 0000 ( nilai 26 melebihi 24, jadi 24 + 2 = 26. Yang
menjadikan yang hidup iaitu 1 sebanyak 2, dan yang selebihnya 0 sebanyak 6 )
= 2^6 ( 2 perlu dikuasakan dengan berapa kosong yang ada iaitu hostnya )
= 64 – 2 ( ditolak 2 untuk network & broadcast )
= 62

ii) Cari bilangan network
= 2^2 ( 2 perlu dikuasakan dengan berapa 1 yang ada iaitu networknya )
= 4 network