Port Number
A port number is a numerical identifier used to pinpoint a specific application, service, or program running on a networked host. While an IP address routes data to a particular device, the port number ensures the transmitted data reaches the exact intended program on that machine, such as port 80 for HTTP web traffic or port 443 for HTTPS.
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Prep Sessions
Anatomy of the Internet: Core Protocols and Packet Delivery @ University of Michigan - Ann Arbor
Ch.3 Transport Layer Mechanisms - Anatomy of the Internet: Core Protocols and Packet Delivery @ University of Michigan - Ann Arbor
Port Numbers and Application Multiplexing - Anatomy of the Internet: Core Protocols and Packet Delivery @ University of Michigan - Ann Arbor
Ch.4 Application Layer Services and Protocols - Anatomy of the Internet: Core Protocols and Packet Delivery @ University of Michigan - Ann Arbor
Web Communication with HTTP, HTTPS, and TLS - Anatomy of the Internet: Core Protocols and Packet Delivery @ University of Michigan - Ann Arbor
Learn After
Which standard port number is used for HTTPS traffic?
An IP address identifies a specific program running on a device, while a port number routes data to the physical device.
What is the primary function of a port number in network communication?
Explain how an IP address and a port number work together to deliver network data to its final destination, using web traffic as an example.
In network communication, what is port 80 designated for?