NET 4000 Chapter Notes - Chapter 11.1.8: Lightweight Directory Access Protocol, Simple Mail Transfer Protocol, Trivial File Transfer Protocol
Document Summary
Network ports are logical connections provided by the tcp or udp protocols. The ip protocol stack uses port numbers to determine what protocol incoming traffic should be directed to. Ports allow a single host with a single ip address to run network services. Each port number is associated with a particular service. Each host can have over 65,000 ports per ip address. Port use is regulated by the internet corporation for assigning names and numbers (icann). Well-known ports range from 0 to 1023 and are assigned to common protocols and services. Registered ports range from 1024 to 49151 and are assigned by icann to a specific service. Dynamic (also called private or high) ports range from 49,152 to 65,535 and can be used by any service on an ad hoc basis. Ports are assigned when a session is established, and released when the session ends. The following table lists the well-known ports that correspond to common internet services:
