Tcp/udp Well Known Ports

Front 1

RJE

Back 1

5, TCP/UDP, Remote Job Entry- send request for jobs to mainframe from remote workstation

Front 2

Echo

Back 2

7, TCP/UDP, testing round trip times.

Front 3

Discard, wake-on-LAN

Back 3

9, TCP/UDP, discard- testing day is discarded by server, wake-on-lan-turns on or wakes up recipient

Front 4

MSP

Back 4

18, TCP/UDP, Message send protocol- application layer protocol sends short message between nodes.

Front 5

FTP- Data

Back 5

20, TCP, File transfer protocol (data)- network protocol that transfers files between two devices

Front 6

FTP (control)

Back 6

21, FTP, File Transport Protocol (Control)- client use port to track the data channel on port 20 and notify server to send data in order.

Front 7

SSH

Back 7

22, TCP, Secure Shell- network protocol that encrypts communication over an unsecured network.

Front 8

TELNET

Back 8

23, TCP, client-server protocol establishes communication to remotely control a host via a command-line interface

Front 9

SMTP

Back 9

25, TCP, Simple mail Transfer Protocol- routes emails between mail servers

Front 10

Time

Back 10

37, TCP/UDP, network protocol that sends date and time

Front 11

MSG ICP

Back 11

29, UDP, efficiently coordinates web caches to minimize requests to the originating server.

Front 12

WHOIS

Back 12

43, TCP, queries databases for registered or stored internet resources such as domain name, IP address or autonomous system.