Free IP addressing and routing lessonsIP addressing and routing · Stage 0 · Addresses and subnets · Step 2
Subnet masks and CIDR
Use a prefix length to find a subnet's network address, broadcast address and host range, and test whether two hosts share one. About 15 minutes.
What is the network address of 192.168.10.77 with the mask 255.255.255.192?
- A192.168.10.64
- B192.168.10.0
- C192.168.10.128
Show the answer
192.168.10.64. Block size 64; 77 falls in the block starting at 64.
4 questions on this idea
Short questions that apply the idea to new cases: trace it, work out a number, put steps in order. A wrong answer explains itself.
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