What is the meaning of "OPCODE" subfield in the Header field of the DNS Message ?
Correct Answer: A
"Opening Code" is not a valid term in the context of DNS messages. The correct term for the subfield in the DNS message header is Operation Code, which specifies the type of operation being performed.
ON Code
Explanation:
"ON Code" is not a recognized term in the context of DNS messages. The correct term for the subfield in the DNS message header is Operation Code, which indicates the type of operation being carried out in the DNS message.
No Answer correct
The "OPCODE" subfield in the Header field of the DNS Message stands for Operation Code. It specifies the kind of query or response being sent in the DNS message, such as a standard query, inverse query, server status request, etc.
Domain
DNS