Network+ All Port Numbers

Front 1

FTP - File Transfer Protocol

Back 1

TCP Port 20 & 21

Hint 1

Transfers files with a remote host (typically requires authentication of a user credentials)

Front 2

SSH - Secure Shell

Back 2

TCP Port 22

Hint 2

Used to securely connect to a remote host (typically via a terminal emulator)

Front 3

SFTP - Secure File Transfer Protocol

Back 3

TCP Port 22

Hint 3

File-transfer service over an SSH connection.

Front 4

SCP - Secure Copy

Back 4

TCP Port 22

Hint 4

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

Front 5

Telnet

Back 5

TCP Port 23

Hint 5

Used to connect to a remote host (typically via a terminal emulator)

Front 6

SMTP - Simple Mail Transfer Protocol

Back 6

TCP Port 25

Hint 6

Used for sending email

Front 7

DNS - Domain Name System

Back 7

TCP Port 53

UDP Port 53

Hint 7

Resolves domain names to corresponding IP addresses.

Front 8

DHCP - Dynamic Host Configuration Protocol

Back 8

UDP Ports 67 & 68

Hint 8

Dynamically assigns IP address information to a network service. ( For example, IP address, subnet mask, DNS server's IP address, and default gateway's IP address.)

Front 9

TFTP - Trivial File Transfer Protocol

Back 9

UDP Port 69

Hint 9

Transfers files with a remote host (does not require authentication of user credentials)

Front 10

HTTP - Hypertext Transfer Protocol

Back 10

TCP Port 80

Hint 10

Retrieves content from a web server

Front 11

POP3 - Post Office Protocol Version 3

Back 11

TCP Port 110

Hint 11

Retrieves email from an email server

Front 12

NTP - Network Time Protocol

Back 12

UDP Port 123

Hint 12

Used by a network device to synchronize its clock with a time server (NTP Server)

Front 13

NNTP - Network News Transport Protocol

Back 13

TCP Port 119

Hint 13

Supports the posting and reading of articles on Usenet news servers.

Front 14

SMTP - Simple Network Time Protocol

Back 14

UDP Port 123

Hint 14

Supports time synchronization among network devices, similar to Network Time Protocol (NTP), although SNTP uses a less complex algorithm in it's calculation and is slightly less accurate than NTP

Front 15

NetBIOS - Network Basic Input/Output System

Back 15

TCP Port 139

UDP Ports 137 & 138

Hint 15

Provides network communication services for LANs that use NetBIOS.

Front 16

IMAP - Internet Message Access Protocol

Back 16

TCP Port 143

Hint 16

Retrieves email from an email server

Front 17

IMAP4 - Internet Message Access Protocol Version 4

Back 17

TCP Port 143

Hint 17

Retrieves email from an email server

Front 18

SNMP - Simple Network Management Protocol

Back 18

UDP Port 161

Hint 18

Used to monitor and manage network devices.

Front 19

SNMP Trap - Simple Network Management Protocol Trap

Back 19

TCP Port 162

UDP Port 162

Hint 19

A notification sent from an SNMP agent to an SNMP manager.

Front 20

LDAP - Lightweight Directory Access Protocol

Back 20

TCP Port 389

Hint 20

Provides directory services for network clients (for example, a user directory including username, password, email, and phone number information)

Front 21

HTTPS - Hypertext Transfer Protocol Secure

Back 21

TCP Port 443

Hint 21

Used to securely retrieve content from a web server.

Front 22

SSL VPN - Secure Sockets Layer Virtual Private Network

Back 22

TCP Port 443

Front 23

SMB - Service Message Block

Back 23

TCP Port 445

Hint 23

Used to share files, printers, and other network resources.

Front 24

IPSec - Internet Security Protocol

----- ------ ------ ------ ----- -----

ISAKMP - Internet Security Association and Key Management Protocol.

Back 24

TCP Port 500

Front 25

rsh - Remote Shell

Back 25

TCP Port 514

Hint 25

Allows commands to be executed on a computer from a remote user.

Front 26

Syslog - System Log

Back 26

TCP Port 514

Front 27

RTSP - Real-Time Streaming Protocol

Back 27

TCP Port 554

UDP Port 554

Hint 27

Communicates with a media server and controls the playback of the server's media files (for example, a video server)

Front 28

LDAPS - Lightweight Directory Access Protocol over SSH

Back 28

TCP Port 636

Hint 28

A secured version of LDAP

Front 29

H.323

Back 29

TCP Port 1720

Hint 29

A signaling protocol that provides multimedia communications over a network.

Front 30

MGCP - Media Gateway Control Protocol

Back 30

TCP Port 2427

UDP Port 2727

Hint 30

Used as a call control and communication protocol for Voice over IP networks.

Front 31

RDP - Remote Desktop Protocol

Back 31

TCP Port 3389

Hint 31

A Microsoft protocol that allows a user to view and control the desktop of a remote computer

Front 32

RTP - Real-Time Transfer Protocol

Back 32

TCP Ports 5004 & 5005

UDP Ports 5004 & 5005

Hint 32

Used for delivering media - based data through a network (such as Voice over IP).

Front 33

SIP - Session Initiation Protocol

Back 33

TCP Port 5061

UDP Port 5060

Hint 33

Used to create and end sessions for one or more media connections, including Voice over IP calls.

Front 34

Well Known Ports

Back 34

0 - 1023

Hint 34

These are ports associated with well known protocols and applications, and are registered with IANA

Front 35

Registered Ports

Back 35

1024 - 49151

Hint 35

Can be publicly registered with IANA for association with protocols and applications.

Front 36

Private Ports

Back 36

49142 - 65535

Hint 36

Can be used privately without registering with IANA.

Front 37

Source Port Ephemeral Range

Back 37

1024 - 65535

Hint 37

Hosts create ephemeral (temporary randomly generated) numbers for source ports that are always in this range.