DNS 2

Question 1

What does DNS stand for? Options: (A) Domain Name System, (B) Digital Name Service, (C) Data Network System, (D) Directory Name Server

Answer 1

Correct Answer: (A) Domain Name System. Explanation: DNS translates domain names into IP addresses.

Question 2

What is the primary function of a DNS server? Options: (A) Translate domain names to IP addresses, (B) Store network traffic, (C) Manage network speed, (D) Control network security

Answer 2

Correct Answer: (A) Translate domain names to IP addresses. Explanation: DNS servers resolve human-readable domain names to numerical IP addresses.

Question 3

What does an A record do in DNS? Options: (A) Maps a domain to an IPv4 address, (B) Maps a domain to an IPv6 address, (C) Maps a domain to a mail server, (D) Maps a domain to another domain

Answer 3

Correct Answer: (A) Maps a domain to an IPv4 address. Explanation: A records associate domain names with IPv4 addresses.

Question 4

What does an AAAA record do in DNS? Options: (A) Maps a domain to an IPv4 address, (B) Maps a domain to an IPv6 address, (C) Maps a domain to a mail server, (D) Maps a domain to another domain

Answer 4

Correct Answer: (B) Maps a domain to an IPv6 address. Explanation: AAAA records associate domain names with IPv6 addresses.

Question 5

What is the purpose of a CNAME record? Options: (A) Maps a domain to an IP address, (B) Maps a domain to another domain, (C) Maps a domain to a mail server, (D) Maps a domain to a service

Answer 5

Correct Answer: (B) Maps a domain to another domain. Explanation: CNAME records are used for aliasing one domain name to another.

Question 6

What is the purpose of an MX record? Options: (A) Maps a domain to an IP address, (B) Maps a domain to a mail server, (C) Maps a domain to another domain, (D) Maps a domain to an IPv6 address

Answer 6

Correct Answer: (B) Maps a domain to a mail server. Explanation: MX records specify the mail servers responsible for a domain’s email.

Question 7

What does a PTR record do? Options: (A) Maps an IP address to a domain name, (B) Maps a domain name to an IP address, (C) Maps a domain to a mail server, (D) Maps a domain to another domain

Answer 7

Correct Answer: (A) Maps an IP address to a domain name. Explanation: PTR records are used for reverse DNS lookups.

Question 8

What is the purpose of an SRV record? Options: (A) Specifies services available for a domain, (B) Maps a domain to an IP address, (C) Maps a domain to another domain, (D) Maps a domain to a mail server

Answer 8

Correct Answer: (A) Specifies services available for a domain. Explanation: SRV records define the location of servers for specific services.

Question 9

What is the function of a TXT record in DNS? Options: (A) Provides text-based information for a domain, (B) Maps a domain to an IP address, (C) Maps a domain to another domain, (D) Maps a domain to a mail server

Answer 9

Correct Answer: (A) Provides text-based information for a domain. Explanation: TXT records store text information, such as SPF or DKIM configurations.

Question 10

What is the purpose of an NS record? Options: (A) Specifies authoritative DNS servers, (B) Maps a domain to an IP address, (C) Maps a domain to another domain, (D) Maps a domain to a mail server

Answer 10

Correct Answer: (A) Specifies authoritative DNS servers. Explanation: NS records identify the DNS servers responsible for a domain.