Nmap ZenMap Switches Practice Test

How do you scan a specific port range in Nmap, for example ports 80, 443, and 1024-1050?

-p 80,443,1024-1050. -p 80-443,1024-1050. -p 80 443 1024-1050 -ports 80,443,1024-1050

Correct Answer:

-p 80,443,1024-1050.

Explanation:

In Nmap, the -p option controls which ports are scanned. You can mix individual ports with port ranges by listing them separated with commas. For your target of ports 80, 443, and the range 1024-1050, the correct syntax is -p 80,443,1024-1050. This exactly specifies the two single ports plus the block from 1024 through 1050. This works because -p accepts a comma-separated list of ports and ranges, and the range 1024-1050 includes every port from 1024 to 1050 inclusive. Using a range like 80-443 would scan every port between 80 and 443, which isn’t the same as scanning only 80 and 443. And using spaces or a non-existent flag like -ports would not be parsed correctly by Nmap.

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