Port Numbers and Program Identification
While an IP address directs data to a specific machine across the network, a port number identifies the specific application or service on that machine intended to receive the data.
Standard services listen on designated port numbers by convention. For instance, web servers typically listen for unencrypted web traffic on port 80 (HTTP) and encrypted web traffic on port 443 (HTTPS).
Together, the combination of an IP address and a port number uniquely identifies both the target host and the exact running process or software service on that host.
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Prep Sessions
Demystifying Network Architecture: Protocols, Addressing, and Packet Flow @ University of Michigan - Ann Arbor
Ch.2 Addressing and Resolution Services - Demystifying Network Architecture: Protocols, Addressing, and Packet Flow @ University of Michigan - Ann Arbor
Network Addressing and Identity - Demystifying Network Architecture: Protocols, Addressing, and Packet Flow @ University of Michigan - Ann Arbor
Learn After
Match each network addressing term or port designation to its correct role or definition.
By convention, web servers listen for encrypted HTTPS web traffic on port ___.
Order the stages of network data delivery from reaching the host machine to reaching the target software application.
Explain how network identifiers are used together to reach the web server process, and identify the specific port numbers that must be configured for unencrypted and encrypted traffic.