Di dalam sebuah jaringan TCP/IP dan UDP,
Port adalah sebuah titik akhir
(endpoint) ke ke Koneksi Logikal, dan cara dari sebuah Program Klien
menspesifikasikan Program Server pada sebuah komputer, dalam sebuah
jaringan.
Nomor-nomor Port:
- 1: TCP Port Service Multiplexer (TCPMUX)
- 5: Remote Job Entry (RJE)
- 7: ECHO
- 18: Message Send Protocol (MSP)
- 20: FTP -- Data
- 21: FTP -- Control
- 22: SSH Remote Login Protocol
- 23: Telnet
- 25: Simple Mail Transfer Protocol (SMTP)
- 29: MSG ICP
- 37: Time
- 42: Host Name Server (Nameserv)
- 43: WhoIs
- 49: Login Host Protocol (Login)
- 53: Domain Name System (DNS)
- 69: Trivial File Transfer Protocol (TFTP)
- 70: Gopher Services
- 79: Finger
- 80: HTTP
- 103: X.400 Standard
- 108: SNA Gateway Access Server
- 109: POP2
- 110: Post Office Protocol 3 (POP3)
- 115: Simple File Transfer Protocol (SFTP)
- 118: SQL Services
- 119: Newsgroup (NNTP)
- 137: NetBIOS Name Service
- 139: NetBIOS Datagram Service
- 143: Interim Mail Access Protocol (IMAP)
- 150: NetBIOS Session Service
- 156: SQL Server
- 161: SNMP
- 179: Border Gateway Protocol (BGP)
- 190: Gateway Access Control Protocol (GACP)
- 194: Internet Relay Chat (IRC)
- 197: Directory Location Service (DLS)
- 389: Lightweight Directory Access Protocol (LDAP)
- 396: Novell Netware over IP
- 443: HTTPS
- 444: Simple Network Paging Protocol (SNPP)
- 445: Microsoft-DS
- 458: Apple QuickTime
- 546: DHCP Client
- 547: DHCP Server
- 563: SNEWS
- 569: MSN
- 1080: Socks
