Statistics for Important Network Ports

Click here to take the quiz!

Port	Service	Protocol	Description	% Correct
53	DNS	TCP/UDP	Domain Name Server	94%
22	ssh	TCP	SSH Remote Login Protocol	88%
23	telnet	TCP	Telnet	88%
443	https	TCP	Hypertext Transfer Protocol over TLS/SSL	88%
20	ftp-data	TCP/UDP	File Transfer Data	81%
21	ftp	TCP/UDP	File Transfer Control	81%
80	http	TCP	Hyper Transfer Protocol	81%
67	DHCP	UDP	Dynamic Host Configuration Protocol (IPv4 Server or Relay-Agent)	75%
68	DHCP	UDP	Dynamic Host Configuration Protocol (IPv4 Client)	75%
25	smtp	TCP	Simple Mail Transfer Protocol	69%
110	pop3	TCP	Post Office Protocol 3	63%
389	Idap	TCP	Lightweight Directory Access Protocol	50%
666	doom	TCP/UDP	Doom	44%
995	pop3s	TCP	Post Office Protocol 3 over TLS/SSL	38%
143	imap4	TCP	Internet Message Access Protocol 4	31%
3306	mysql	TCP/UDP	MySQL Port	31%
587	smtp	TCP	Simple Mail Transfer Prtocol (Can TLS)	31%
993	imaps	TCP	Internet Message Access Protocol 4 over TLS/SSL	25%
119	nntp	TCP	Network New Transfer Protocol	19%