Q: What is an IP Address?
Every computer that communicates over the Internet is assigned an IP address that uniquely identifies the device and distinguishes it from other computers on the Internet. An IP address consists of four parts. For example :
206.13.28.12
Think of your IP address as what your phone number is to you. Every device on a TCP/IP network has an address.
Q: What are ports?
In TCP/IP networking ports are the endpoint to a logical connection. When you type in a web site address your computer is opening up a connection on a remote port and asking for the web pages to be sent to your computer. There are a total of 65535 ports total.
Here is a list of common ports and how they are typically used :
Port Number / Description
- 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 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 Sock