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Multiple Choice

Which term describes the port range from 0 to 1023?

The range 0–1023 is the set of well-known ports. These ports are reserved for commonly used services and were assigned by IANA to standard protocols (for example, HTTP on port 80, HTTPS on 443, SSH on 22, DNS on 53, SMTP on 25). Because they are so standardized, binding to these ports on many systems requires elevated privileges, and network devices often treat them as the default targets for service access. The other ranges serve different purposes: registered ports (1024–49151) are used by services that have been assigned a specific application name, while dynamic or private ports (49152–65535) are used for temporary, client-side connections and private applications. Therefore, the 0–1023 range is defined as well-known ports.

The range 0–1023 is the set of well-known ports. These ports are reserved for commonly used services and were assigned by IANA to standard protocols (for example, HTTP on port 80, HTTPS on 443, SSH on 22, DNS on 53, SMTP on 25). Because they are so standardized, binding to these ports on many systems requires elevated privileges, and network devices often treat them as the default targets for service access. The other ranges serve different purposes: registered ports (1024–49151) are used by services that have been assigned a specific application name, while dynamic or private ports (49152–65535) are used for temporary, client-side connections and private applications. Therefore, the 0–1023 range is defined as well-known ports.