Oct 15, 2015 · There were two more DNSSEC-related flags introduced in RFC 4035: CD (Checking Disabled): indicates a security-aware resolver should disable signature validation (that is, not check DNSSEC records) AD (Authentic Data): indicates the resolver believes the responses to be authentic - that is, validated by DNSSEC

Mar 27, 2025 · Lists the set of enabled extended DNS errors. It must be an INFO-CODE decimal value in the [Extended DNS Error Codes] registry. Provides a URL that points to unstructured resolver information that is used for troubleshooting. In [RFC1002], two types are defined.

Dec 1, 2024 · DNS queries can include several flags that modify the behavior of the query and the response. Below is a list of common DNS query flags along with their explanations: Query/Response: This flag indicates whether the message is a query (0) or a response (1). Operation Code: This 4-bit field specifies the kind of query. Common values include:

The x86 processors have a large set of flags that represent the state of the processor, and the conditional jump instructions can key off of them in combination.

May 20, 2022 · opcode: It is a 4-bit subfield that defines the type of query carried by a message. This field value is repeated in the response. Following is the list of opcode values with a brief description: If the value of the opcode subfield is 0 then it is a standard query.

Oct 16, 2019 · Those flags are described in RFC 1035 section 4.1.1. THe bit you have set, to get 0x0500 is this. AA Authoritative Answer - this bit is valid in responses, and specifies that the responding name server is an authority for the domain name in question section.

Jul 13, 2023 · DNS record flags. The following flags refer to a resource record's (RR) section within a DNS message:

Sets the DF flag in the EFLAGS register. When the DF flag is set to 1, string operations decrement the index registers (ESI and/or EDI). Operation is the same in all modes.

In computing, an opcode (abbreviated from operation code) [1] [2] is an enumerated value that specifies the operation to be performed. Opcodes are employed in hardware devices such as arithmetic logic units (ALUs), central processing units (CPUs), and software instruction sets.

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