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1TCP Port Service Multiplexer (TCPMUX)
The specification describes a multiplexing service
that may be accessed with a network protocol to
contact any one of a number of available TCP
services of a host on a single
5 Remote Job Entry (RJE)
Remote job entry is the procedure for
sending requests for data
processing tasks or 'jobs' to mainframe
computers from remote workstations
Message send protocol 18
is an application layer protocol used to send a short
message between nodes on a network.
20 FTP -- Data
The FTP protocol uses a pair of connections between
the FTP client and FTP server.
21FTP -- Control
TP servers open their machine's port 21 and listen for
incoming client connections.
22 SSH Remote Login Protocol
is a cryptographic (encrypted) network protocol to
allow remote login and other network services to
operate securely over an unsecured network.
this protocol is used to establish a connection to
Transmission Control Protocol (TCP) port
25 Simple Mail Transfer Protocol (SMTP)
Simple Mail Transfer Protocol (SMTP) is an Internet
standard for electronic mail (email) transmission
29 MSG ICP
TCP ports use the Transmission Control Protocol.
UDP ports use the Datagram Protocol, a
communications protocol for the Internet network
A host connects to a server that supports
the Time Protocol on port 37. The server then sends
the time as a 32-bit unsigned integer in binary
42Host Name Server (Name server)
is an obsolete network protocol used in translating
a host name to an Internet address.
is a query and response protocol that is widely used for
querying databases that store the registered users
49 Login Host Protocol (Login)
uses the Transmission Control Protocol. TCP is one of
the main protocols in TCP/IP networks.
Flagged as a virus
53 Domain Name System (DNS)
is a hierarchical distributed naming system for
computers, services, or any resource connected to
the Internet or a private network.
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.
70 Gopher Services
is a TCP/IP application layer protocol designed for
exchange of human-oriented status and user
is an application protocol for distributed,
collaborative, hypermedia information systems
103 X.400 Standard
X.400 is the messaging standard specified by the ITU-