Which port and protocol are commonly associated with DNS services?

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Multiple Choice

Which port and protocol are commonly associated with DNS services?

Explanation:
DNS commonly uses port 53 and supports both UDP and TCP. For standard lookups, UDP on port 53 is used because it’s fast and lightweight. If a response would be too large for a UDP packet or the interaction requires reliable delivery (such as zone transfers or DNSSEC-related traffic), DNS shifts to TCP on port 53 to ensure the data arrives correctly. The other options point to different services: 80 is HTTP, 22 is SSH, and 443 is HTTPS, none of which are the typical channel for DNS.

DNS commonly uses port 53 and supports both UDP and TCP. For standard lookups, UDP on port 53 is used because it’s fast and lightweight. If a response would be too large for a UDP packet or the interaction requires reliable delivery (such as zone transfers or DNSSEC-related traffic), DNS shifts to TCP on port 53 to ensure the data arrives correctly. The other options point to different services: 80 is HTTP, 22 is SSH, and 443 is HTTPS, none of which are the typical channel for DNS.

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