PORTS IN NETWORKING
Vaibhav Ruparel
C | C++ | Java | DSA | Networking | Linux | Cyber Security | SOC Analyst | SIEM | OSINT | Digital Forensics
-> A port is a virtual point where network connections start and end. Ports are software-based and managed by a computer's operating system. Each port is associated with a specific process or service. Ports allow computers to easily differentiate between different kinds of traffic: emails go to a different port than webpages, for instance, even though both reach a computer over the same Internet connection.
-> Ports are standardized across all network-connected devices, with each port assigned a number. Most ports are reserved for certain protocols for example, all HTTP messages go to port 80. While IP Address enable messages to go to and from specific devices, port numbers allow targeting of specific services or applications within those devices.
->01) HTTPS: 443
02) FTP: 20, 21
03) SFTP: 22
04) FTPS: 989, 990
05) SIP: 5060
06) DNS: 53
07) SMTP: 25
08) POP3: 110
09) IMAP: 143
10) Telnet: 23
11) SSH: 22
12) NNTP: 119
13) NNTPS: 563
14) IRC: 194
15) NTP: 123
16) NMP: 161, 162
17) CMIP: 163, 164
18) Syslog: 514
19) Kerberos: 88
20) NetBIOS: 137-139
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