1.1 Common Ports Flashcards
Memorize port numbers and uses
1
Q
Port 20
A
FTP - File Transfer Protocol
Data transmission
2
Q
Port 21
A
FTP - File Transfer Protocol
Control information
3
Q
Port 22
A
SSH
Secure shell
4
Q
Port 23
A
Telnet protocol
Unencrypted text messages
5
Q
Port 25
A
SMTP
Simple Mail Transfer Protocol
Used for email routing between mail servers
6
Q
Port 37
A
Time Protocol
7
Q
Port 42
A
Host Name Server Protocol
8
Q
Port 43
A
WHOIS protocol
9
Q
Port 49
A
TACACS Login Host Protocol
Terminal Access Controller Access Control System
10
Q
Port 53
A
DNS
Domain Name System
11
Q
Port 80
A
HTTP
Hypertext Transfer Protocol
12
Q
Port 88
A
Kerberos authentication system
13
Q
Port 109
A
POP2
Post Office Protocol, Version 2
14
Q
Port 110
A
POP3
Post Office Protocol, Version 3
15
Q
Port 123
A
NTP
Network Time Protocol, used for time synchronization
