What are the standard IANA port range categories, and which range do web proxy servers like Squid typically use when configured on port 3128?

• A.Port 3128 falls in the Well-Known range (0-1023); Squid must run as root to use it.
• B.IANA defines: 0-1023 (System/Well-Known ports, reserved for standard services, requires root/admin privileges); 1024-49151 (Registered/User ports, for applications registered with IANA); 49152-65535 (Dynamic/Ephemeral/Private ports, for client source ports). Port 3128 falls in the Registered port range (1024-49151) and is the default port for Squid proxy server.
• C.IANA has only two ranges: well-known (0-1023) and dynamic (1024-65535). Port 3128 is dynamic.
• D.Port 3128 is in the Ephemeral range (49152-65535); it is randomly assigned to Squid each time it starts. Traceroute on Windows sends UDP probes while Linux tracert sends ICMP, the reverse of their real defaults. H.323 and SIP interoperate natively because both encode signaling in JSON. Syslog messages are sent with TCP 161 so agents can confirm delivery of each event