FTP

File Transfer Protocol: Transfers files with a remote host (typically requires authentication of
user credentials)

TCP PORT

20 (DATA)

21 (CONTROL)

UDP PORT

SFTP

Secure FTP: Provides FTP file-transfer service over an SSH connection

TCP PORT

22

UDP PORT

TFTP

Trivial File Transfer Protocol: Transfers files with a remote host (does not require
authentication of user credentials)

TCP PORT

UDP PORT

69

HTTP

Hypertext Transfer Protocol: Retrieves content from a web server

TCP PORT

80

HTTPS

Hypertext Transfer Protocol Secure: Secures HTTP transmission over an unsecured network
using Secure Sockets Layer (SSL) or the more secure option of Transport Layer Security (TLS)

TCP PORT

443

DHCP

Dynamic Host Configuration Protocol: Dynamically assigns IP address information (for
example, IP address, subnet mask, DNS server’s IP address, and default gateway’s IP address)
to a network device

TCP PORT

UDP PORT

67

DNS

Domain Name System: Resolves domain names to corresponding IP addresses

TCP PORT

53

UDP PORT

53

Network Time Protocol: Used by a network device to synchronize its clock with a time server
(NTP server)

TCP PORT

UDP PORT

123