How can we help?

You can also find more resources in our Help Center.

20 terms

Common Ports & Protocols

STUDY
PLAY
20,21
FTP, File Transfer Protocol
22
SSH, Secure Shell
23
Telnet, Remote Terminal Emulation
25
SMTP, Simple Mail Transfer Protocol
50,51
IPSec, Internet Protocol Security
53
DNS, Domain Name Server
67,68
DHCP, Dynamic Host Configuration Protocol
69
TFTP, Trivial File Transfer Protocol
80
HTTP, HyperText Transfer Protocol
110
POP3, Post Office Protocol
119
NNTP, Network News Transfer Protocol
123
NTP, Network Time Protocol
135-139
NetBIOS
143
IMAP4, Internet Message Access Protocol
161
SNMP, Simple Network Management Protocol
389
LDAP, Lightweight Directory Access Protocol
443
HTTPS, HyperText Transfer Protocol with Secure Sockets Layer (SSL)
Well Known Ports
Assigned for specific Protocols and Services, Ports 0 to 1,023
Registered Ports
ICANN can assign a specific port for a newly created network service, Ports 1,024 to 49,151
Dynamic (Private or High) Ports
Ports 49,152 to 65,535