VLSM technique is used for creating subnets from different -different subnet masks.
Note: – Allowing Network admin to distribute IP addresses in more effective and efficient manner.
Classless addressing or CIDR addressing uses VLSM technique over FLSM (Fixed Length Subnet Masking used in classful addressing)
FLSM Wasted many IP Address, Make inefficient IP Address utilization.
VLSM make efficient and effective way to use IP Address.
Important CIDR Notation with Explanation
Example:-
Q. How many hosts in IP Address 192.168.23.44/24?
Answer CIDR Notation /24 means 24 bit for Network portion and rest 8 bit for host portion.
28 -2=256-2=254 host available in each subnet.
2 host minus because one reserve for network id and second reserve for broadcast id.
Q. Find Subnet Mask of IP Address 192.168.23.44/24?
Answer CIDR Notation /24 means 24 bit for Network portion and rest 8 bit for host portion.
| 11111111.11111111.11111111.00000000 So subnet mask is 255.255.255.0 |
MCQ-IP Addressing-CLASSLESS CIDR OR VLSM IP Addressing – ExamHope
