101 · Question #658

Which type of DNS request should the client send to its configured server?

No correct answer was provided for this question; based on standard DNS client behavior, a client resolving a hostname to an IPv4 address sends a type A request to its configured DNS server.

Section 1: OSI Model, Network, and Application Delivery Basics

Question

Options

Atype MX
Btype AAAA
Ctype NS
Dtype A

Why each option

No correct answer was provided for this question; based on standard DNS client behavior, a client resolving a hostname to an IPv4 address sends a type A request to its configured DNS server.

Atype MX

Type MX records identify mail exchange servers for a domain and are used only for email routing, not for general client hostname-to-IP resolution.

Btype AAAA

Type AAAA records resolve hostnames to 128-bit IPv6 addresses; this is not the standard query type unless the client is explicitly configured for IPv6 name resolution.

Ctype NS

Type NS records identify authoritative name servers for a domain zone and are used in DNS delegation lookups, not for client-to-IP address resolution.

Dtype A

Concept tested: DNS query types and IPv4 hostname resolution

Source: https://www.rfc-editor.org/rfc/rfc1035

Topics

#DNS#record types#type A#IPv4 resolution

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