A host is configured as 192.168.7.100/28. Write the broadcast address of its subnet in dotted-quad notation.

LPIC-1 Exam 102-500, objective 109. Networking fundamentals hard

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Answer

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Accepted answer

Case sensitive — Linux is, and grading LS as ls would teach a falsehood.

Why

A /28 is the mask 255.255.255.240, so blocks step by 16 in the last octet: 0, 16, 32, ..., 96, 112. The address 100 falls in the block starting at 96, which runs to 111. Therefore the network address is 192.168.7.96, the broadcast address is 192.168.7.111, and the usable host range is 192.168.7.97 to 192.168.7.110 (14 hosts).

Where this comes from

Cited
LPI exam objective 109.1
What it says
Calculate the broadcast address of a subnet from a host address and prefix length.

Practise this

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