CyberCertPrepSecurity FundamentalsNetworking FundamentalsEASYFree question
What are the well-known port numbers for HTTP, HTTPS, SSH, FTP, and DNS?
- A.HTTP=8080, HTTPS=8443
- B.HTTP=80, HTTPS=443, SSH=22, FTP=21 (control)/20 (data), DNS=53 - these are well-known ports (0-1023) assigned by IANA and are essential knowledge for network security professionals
- C.All services use port 80
- D.HTTP=443, HTTPS=80
Why B is correct
Essential ports: HTTP(80), HTTPS(443), SSH(22), FTP(21/20), DNS(53), SMTP(25), POP3(110), IMAP(143), RDP(3389), Telnet(23), SNMP(161), LDAP(389), MySQL(3306), PostgreSQL(5432), SMB(445). Well-known ports: 0-1023, registered: 1024-49151, dynamic: 49152-65535.
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