For each of the groups of IP addresses below, identify how many distinct networks are represented, provide the network number(s) in each case and give a brief reason for your answer. 10.5.5.1/24 10.5.6.2/24 10.7.8.3/24
Try an answer before revealing the guidance below.
Key Concepts
- /24 prefix
- First three octets
- Network number
Answer Approach
- Keep the first 24 bits (three octets) of each address.
- Set the host byte to zero.
- Count the distinct results.
Full Answer
Answer status: Draft answer (unofficial). Revision notes, not an official marking scheme.
3 networks: 10.5.5.0/24, 10.5.6.0/24 and 10.7.8.0/24. With /24 the first three octets identify the network, and each address differs in those octets.
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