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If the first address is First address = 18.14.12.0/22. What is the last address?

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If the first address is First address = 18.14.12.0/22. What is the last address?

(a) 18.14.15.128/22

(b) 18.14.15.64/22

(c) 18.14.15.32/22

(d) 18.14.15.255/22

This question was posed to me during an internship interview.

This intriguing question comes from Overview in chapter Wireless Network Security and Network Security Overview of Cryptograph & Network Security

1 Answer

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Best answer
Right option is (d) 18.14.15.255/22

Best explanation: Last address = (any address) OR [NOT (network mask)].

The Last Address = 18.14.15.255/22.

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