Port Numbers and Program Identification
While IP addresses identify host devices on a network, a port number identifies a specific program or service running on that device. For example, web servers typically listen for inbound traffic on port 80 for standard HTTP or port 443 for encrypted HTTPS.
By combining an IP address with a port number, the network stack identifies exactly which application on which specific device is meant to receive any piece of incoming data.
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Prep Sessions
From Packets to Protocols: How Modern Networks Transmit Data @ University of Michigan - Ann Arbor
Ch.2 Addressing and Name Resolution - From Packets to Protocols: How Modern Networks Transmit Data @ University of Michigan - Ann Arbor
Network Addressing and Identifiers - From Packets to Protocols: How Modern Networks Transmit Data @ University of Michigan - Ann Arbor
Learn After
Match each network identifier or port number to its corresponding description.
Web servers typically listen for inbound encrypted HTTPS traffic on port ___.
Order the stages by which the network stack uses addressing identifiers to deliver incoming data to the correct application.
Which port number must the incoming request specify, and how do the IP address and port number work together to route the request correctly?