Free IP addressing and routing lessonsIP addressing and routing · Stage 0 · Addresses and subnets · Step 3
Subnetting and aggregation
Split one block into subnets, size each for the hosts it needs, and combine neighbouring blocks into one route. About 14 minutes.
A department needs 50 hosts. What is the smallest subnet (longest prefix) that holds them?
- A/26 (62 usable hosts)
- B/27
- C/25
Show the answer
/26 (62 usable hosts). /27 has only 30; /26 is the smallest block of at least 50.
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