2. 1TCP Port Service Multiplexer
(TCPMUX)
• The TCP Port Service Multiplexer (TCPMUX) is
a little-used Internet protocol defined in RFC
1078, this is a multicelular service.
3. 5Remote Job Entry (RJE)
• Remote job entry is the procedure for sending
requests for data processing tasks or 'jobs'
to mainframe computers from
remote workstations, and by extension the
process of receiving the output from such
tasks at a remote workstation
4. 7ECHO
• The Echo Protocol is a service in the Internet
Protocol Suite defined in RFC 862. It was
originally proposed for testing and
measurement of round-trip times.
5. 18Message Send Protocol (MSP
• The Message Send Protocol (MSP), more
precisely referred to as Message Send Protocol
2, is an application layer protocol used to send
a short message between nodes on a network.
6. 20FTP -- Data
• Is used to transfer data to other
objects/electronics.
8. 22SSH Remote Login Protocol
• Secure Shell, or SSH, is
a cryptographic (encrypted) network
protocol to allow remote login and other
network services to operate securely over an
unsecured network.
9. 23Telnet
• Telnet is an application layer protocol used on
the Internet or local area networks to provide
a bidirectional interactive text-oriented
communication facility using a
virtual terminalconnection. User data is
interspersed in-band with Telnet control
information in an 8-bit byte oriented data
connection over the Transmission Control
Protocol (TCP).
10. 25Simple Mail Transfer
Protocol (SMTP)
• Simple Mail Transfer Protocol (SMTP) is
an Internet standard for electronic
mail (email) transmission. First defined by RFC
821in 1982, it was last updated in 2008 with
the Extended SMTP additions by RFC 5321—
which is the protocol in widespread use today.
11. 29MSG ICP
• UDP Port 29 may use a defined protocol to
communicate depending on the application. A
protocol is a set of formalized rules that
explains how data is communicated over a
network. Think of it as the language spoken
between computers to help them
communicate more efficiently.
12. 37Time
• The Time Protocol is a network protocol in
the Internet Protocol Suite defined in 1983
in RFC 868 by Jon Postel and K. Harrenstein.
Its purpose is to provide a site-independent,
machine readable date and time.
13. 42Host Name Server (Nameserv)
• the ARPA Host Name Server Protocol
(NAMESERVER[1]), is
an obsolete network protocol used in
translating a host name to an Internet address
14. 43WhoIs
• This article is about a method for checking
information about ownership of a domain
name. For an IRC command called WHOIS
15. 49Login Host Protocol (Login)
• Terminal Access Controller Access-Control
System (TACACS, usually pronounced like tack-
axe) refers to a family of related protocols
handling remote authentication and related
services for networked access control through a
centralized server. The original TACACS protocol,
which dates back to 1984, was used for
communicating with an authentication server,
common in older UNIX networks; it spawned
related protocols:
16. 53Domain Name System (DNS)
• The Domain Name System (DNS) is
a hierarchical distributed naming system for
computers, services, or any resource connected to
the Internet or a private network. It associates various
information with domain names assigned to each of
the participating entities. Most prominently, it
translates domain names, which can be easily
memorized by humans, to the numerical IP
addresses needed for the purpose of computer
services and devices worldwide. The Domain Name
System is an essential component of the functionality
of most Internet services because it is the Internet's
primary directory service.
17. 69Trivial File Transfer Protocol (TFTP)
• Trivial File Transfer Protocol (TFTP) is a
simple, lock-step, File Transfer Protocol which
allows a client to get from or put a file onto a
remote host. One of its primary uses is in the
early stages of nodes booting from a local area
network. TFTP has been used for this
application because it is very simple to
implement.
18. 70Gopher Services
• The Gopher protocol /ˈɡoʊfər/ is
a TCP/IP application layer protocol designed for
distributing, searching, and retrieving documents
over the Internet. The Gopher protocol was
strongly oriented towards a menu-document
design and presented an alternative to theWorld
Wide Web in its early stages, but
ultimately HTTP became the dominant protocol.
The Gopher ecosystem is often regarded as the
effective predecessor of the World Wide Web.
19. Finger protocol
• In computer networking, the Name/Finger
protocol and the Finger user information
protocol are simple network protocols for the
exchange of human-oriented status and user
information.
20. 80HTTP
• in Internet — TCP port 80, most often used
by Hypertext Transfer Protocol
21. 103X.400 Standard
• X.400 is a suite of ITU-T Recommendations
that define standards for Data Communication
Networks for Message Handling Systems
(MHS) — more commonly known as email.
