Saturday, June 4, 2022

How Many Well-Known TCP Port Numbers Are There?

 

LIST OF WELL-KNOWN PORTS

Port numbers range from 0 to 65535, but only port numbers 0 to 1023 are reserved for privileged services and designated as well-known ports. The following list of well-known port numbers specifies the port used by the server process as its contact port.

Port Number —

Description

1TCP Port Service Multiplexer (TCPMUX)
5Remote Job Entry (RJE)
7ECHO
18Message Send Protocol (MSP)
20FTP — Data
21FTP — Control
22SSH Remote Login Protocol
23Telnet
25Simple Mail Transfer Protocol (SMTP)
29MSG ICP
37Time
42Host Name Server (Nameserv)
43WhoIs
49Login Host Protocol (Login)
53Domain Name System (DNS)
69Trivial File Transfer Protocol (TFTP)
70Gopher Services
79Finger
80HTTP
103X.400 Standard
108SNA Gateway Access Server
109POP2
110POP3
115Simple File Transfer Protocol (SFTP)
118SQL Services
119Newsgroup (NNTP)
137NetBIOS Name Service
139NetBIOS Datagram Service
143Interim Mail Access Protocol (IMAP)
150NetBIOS Session Service
156SQL Server
161SNMP
179Border Gateway Protocol (BGP)
190Gateway Access Control Protocol (GACP)
194Internet Relay Chat (IRC)
197Directory Location Service (DLS)
389Lightweight Directory Access Protocol (LDAP)
396Novell Netware over IP
443HTTPS
444Simple Network Paging Protocol (SNPP)
445Microsoft-DS
458Apple QuickTime
546DHCP Client
547DHCP Server
563SNEWS
569MSN
1080Socks
  • Well-known ports range from 0 through 1023.
  • Registered ports are 1024 to 49151.
  • Dynamic ports (also called private ports) are 49152 to 65535.

Number of logical ports ranges from _____ to _____ The numbers are


SOLUTION

The numbers are pre-assigned by IANA (Internet Assigned Numbers Authority) which ranges from 0 – 65535. A port number is a 16-bit unsigned integer, thus ranging from 0 to 65535. All the used protocols are assigned with a unique port number.

No comments:

Post a Comment

Configure LOG4J in INTELLIJ in Windows.

IntelliJ debugger for temporary logging In this video, it is shown how to use Log4j in Intellij. Sorry for the audio quality :) Log4j zip fi...