N10-005 · Question #643
N10-005 Question #643: Real Exam Question with Answer & Explanation
The correct answer is E: Allow TCP port 22 outbound. Two outbound rules are needed: (1) TCP port 80 for standard HTTP web browsing - HTTP is a TCP-based protocol, so UDP would be incorrect. (2) TCP port 22 for SSH - SSH also uses TCP, not UDP, and port 22 is the correct SSH port (not port 21, which is FTP). Both rules must specify
Question
Options
- AAllow UDP port 21 outbound
- BAllow UDP port 22 outbound
- CAllow UDP port 80 outbound
- DAllow TCP port 21 outbound
- EAllow TCP port 22 outbound
- FAllow TCP port 80 outbound
Explanation
Two outbound rules are needed: (1) TCP port 80 for standard HTTP web browsing - HTTP is a TCP-based protocol, so UDP would be incorrect. (2) TCP port 22 for SSH - SSH also uses TCP, not UDP, and port 22 is the correct SSH port (not port 21, which is FTP). Both rules must specify TCP because these application-layer protocols require the reliability and connection-oriented nature of TCP. UDP variants for these ports are incorrect because neither HTTP nor SSH uses UDP.
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