TCP port 443 is reserved for HTTPS (Hypertext Transfer Protocol Secure), which uses TLS encryption to secure web traffic. It is the standard port for encrypted web communications.
A. Telnet uses TCP port 23.
B. SMTP commonly uses TCP ports 25, 465, or 587.
D. SNMP typically uses UDP ports 161 (queries) and 162 (traps).
References (CompTIA Network+ N10-009):
Domain: Network Standards, Protocols, and Implementations — Common ports and services.
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