Network+ Ports and Protocols
(2022/2023) Graded A
DHCP ✔✔Dynamic Host Configuration Protocol: Dynamically assigns IP address information
(for example, IP address, subnet mask, DNS server's IP address, and default gate
...
Network+ Ports and Protocols
(2022/2023) Graded A
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, 68
DNS ✔✔Domain Name System: Resolves domain names to corresponding IP addresses
TCP Port 53
UDP Port 53
FTP ✔✔File Transfer Protocol: Transfers files with a remote host (typically requires
authentication of user credentials)
TCP Port 20 and 21
UDP Port
H.323 ✔✔A signaling protocol that provides multimedia communications over a network
TCP Port 1720
UDP Port
HTTP ✔✔Hypertext Transfer Protocol: Retrieves content from a web server
TCP Port 80
UDP Port
HTTPS ✔✔Hypertext Transfer Protocol Secure: Used to securely retrieve content from a web
server
TCP Port 443
UDP Port
IMAP/ IMAP4 ✔✔Internet Message Access Protocol: (version 4 most recent) Retrieves email
from an email server
TCP Port 143
LDAP ✔✔Lightweight Directory Access Protocol: Provides directory services (for example, a
user directory that includes username, password, email, and phone number information) to
network clients
TCP Port 389
UDP Port
LDAPS ✔✔Lightweight Directory Access Protocol over SSH: A secured version of LDAP
TCP Port 636
UDP Port
MGCP ✔✔Media Gateway Control Protocol: Used as a call control and communication protocol
for Voice over IP networks
TCP Port
UDP Port 2427, 2727
NetBIOS ✔✔Network Basic Input/Output System: Provides network communication services
for LANs that use NetBIOS
TCP Port 139
UDP Port 137, 138
NNTP ✔✔Network News Transport Protocol: Supports the posting and reading of articles on
Usenet news servers
TCP Port 119
UDP Port
NTP ✔✔Network Time Protocol: Used by a network device to synchronize its clock with a time
server (NTP server)
TCP Port
UDP Port 123
POP3 ✔✔Post Office Protocol Version 3: Retrieves email from an email server
TCP Port 110
UDP Port
RDP ✔✔Remote Desktop Protocol: A Microsoft protocol that allows a user to view and control
the desktop of a remote computer
TCP Port 3389
UDP Port
rsh ✔✔Remote Shell: Allows commands to be executed on a computer from a remote user
TCP Port 514
UDP Port
RTP ✔✔Real-time Transport Protocol: Used for delivering media-based data (such as Voice
over IP) through the network
TCP Port 5004, 5005
UDP Port 5004, 5005
RTSP ✔✔Real-Time Streaming Protocol: Communicates with a media server (for example, a
video server) and controls the playback of the server's media files
TCP Port 554
UDP Port 554
SCP ✔✔Secure Copy: Provides a secure file-transfer service over an SSH connection and offers
a file's original date and time information, which is not available with FTP
TCP Port 22
UDP Port
SFTP ✔✔Secure FTP: Provides FTP file-transfer service over an SSH connection
TCP Port 22
UDP Port
SIP ✔✔Session Initiation Protocol: Used to create and end sessions for one or more media
connections, including Voice over IP calls
TCP Port 5061
UDP Port 5060
SMB ✔✔Server Message Block: Used to share files, printers, and other network resources
TCP Port 445
UDP Port
SMTP ✔✔Simple Mail Transfer Protocol: Used for sending email
TCP Port 25
UDP Port
SNMP ✔✔Simple Network Management Protocol: Used to monitor and manage network
devices
TCP Port
UDP Port 161
SNMP Trap ✔✔Simple Network Management Protocol Trap: A notification sent from an SNMP
agent to an SNMP manager
TCP Port 162
UDP Port 162
SNTP ✔✔Simple Network Time Protocol: Supports time synchronization among network
devices, similar to Network Time Protocol (NTP), although SNTP uses a less complex algorithm
in its calculation and is slightly less accurate than NTP
TCP Port
UDP Port 123
SSH ✔✔Secure Shell: Used to securely connect to a remote host (typically via a terminal
emulator)
TCP Port 22
UDP Port
Telnet ✔✔Telnet: Used to connect to a remote host (typically via a terminal emulator)
TCP Port 23
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
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