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DNS Management

Description: Test your knowledge on DNS Management with these challenging questions.
Number of Questions: 14
Created by:
Tags: dns domain name system dns records dns zones dns servers
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What is the primary function of a DNS server?

  1. To translate domain names into IP addresses

  2. To store website content

  3. To manage email accounts

  4. To provide internet access

Show answer
Correct Option: A
Explanation:

A DNS server's primary function is to resolve domain names into their corresponding IP addresses, enabling devices to communicate with each other on the internet.

Which DNS record type is used to map a domain name to an IP address?

  1. A

  2. CNAME

  3. MX

  4. NS

Show answer
Correct Option: A
Explanation:

The A record is used to map a domain name to an IPv4 address.

What is the purpose of a CNAME record?

  1. To alias one domain name to another

  2. To specify the mail server for a domain

  3. To define the authoritative DNS servers for a domain

  4. To set the time-to-live (TTL) for a DNS record

Show answer
Correct Option: A
Explanation:

A CNAME record is used to create an alias for a domain name, pointing it to another domain name.

Which DNS record type is used to specify the mail server for a domain?

  1. A

  2. CNAME

  3. MX

  4. NS

Show answer
Correct Option: C
Explanation:

The MX record is used to specify the mail server responsible for handling email for a domain.

What is the purpose of a NS record?

  1. To map a domain name to an IP address

  2. To alias one domain name to another

  3. To specify the mail server for a domain

  4. To define the authoritative DNS servers for a domain

Show answer
Correct Option: D
Explanation:

A NS record is used to specify the authoritative DNS servers responsible for a domain.

What is the time-to-live (TTL) for a DNS record?

  1. The amount of time a DNS record is valid

  2. The amount of time a DNS record is cached

  3. The amount of time it takes for a DNS record to be updated

  4. The amount of time it takes for a DNS record to be deleted

Show answer
Correct Option: A
Explanation:

The TTL is the amount of time a DNS record is valid before it needs to be refreshed.

What is the purpose of a DNS zone?

  1. To define the authoritative DNS servers for a domain

  2. To specify the DNS records for a domain

  3. To create a subdomain of a domain

  4. To manage the security of a domain

Show answer
Correct Option: B
Explanation:

A DNS zone is a collection of DNS records for a specific domain.

What is the difference between a primary DNS server and a secondary DNS server?

  1. The primary DNS server is responsible for updating DNS records, while the secondary DNS server is responsible for caching DNS records.

  2. The primary DNS server is responsible for resolving DNS queries, while the secondary DNS server is responsible for forwarding DNS queries to the primary DNS server.

  3. The primary DNS server is responsible for managing DNS zones, while the secondary DNS server is responsible for replicating DNS zones.

  4. The primary DNS server is responsible for authenticating DNS queries, while the secondary DNS server is responsible for validating DNS queries.

Show answer
Correct Option: C
Explanation:

The primary DNS server is responsible for managing DNS zones, while the secondary DNS server is responsible for replicating DNS zones from the primary DNS server.

What is the purpose of a DNSSEC?

  1. To provide authentication for DNS records

  2. To prevent DNS spoofing

  3. To improve DNS performance

  4. To reduce DNS latency

Show answer
Correct Option: A
Explanation:

DNSSEC is a security extension to the DNS protocol that provides authentication for DNS records.

What is the role of a DNS resolver?

  1. To translate domain names into IP addresses

  2. To store DNS records

  3. To forward DNS queries to DNS servers

  4. To manage DNS zones

Show answer
Correct Option: C
Explanation:

A DNS resolver is responsible for forwarding DNS queries to DNS servers.

What is the purpose of a root DNS server?

  1. To store the DNS records for all domains

  2. To resolve DNS queries for all domains

  3. To forward DNS queries to the appropriate DNS servers

  4. To manage the DNSSEC keys for all domains

Show answer
Correct Option: C
Explanation:

Root DNS servers are responsible for forwarding DNS queries to the appropriate DNS servers for the requested domain.

What is the difference between a recursive DNS query and an iterative DNS query?

  1. A recursive DNS query is sent to a single DNS server, while an iterative DNS query is sent to multiple DNS servers.

  2. A recursive DNS query is sent to the root DNS servers, while an iterative DNS query is sent to the authoritative DNS servers.

  3. A recursive DNS query is used to resolve a domain name into an IP address, while an iterative DNS query is used to find the authoritative DNS servers for a domain.

  4. A recursive DNS query is used to check the validity of a DNS record, while an iterative DNS query is used to update a DNS record.

Show answer
Correct Option: A
Explanation:

A recursive DNS query is sent to a single DNS server, which is responsible for resolving the query or forwarding it to other DNS servers. An iterative DNS query is sent to multiple DNS servers, each of which is responsible for resolving a portion of the query.

What is the purpose of a DNS cache?

  1. To store frequently requested DNS records

  2. To improve DNS performance

  3. To reduce DNS latency

  4. To prevent DNS spoofing

Show answer
Correct Option: B
Explanation:

A DNS cache is used to store frequently requested DNS records, which can improve DNS performance by reducing the number of times a DNS server needs to query other DNS servers.

What is the difference between a public DNS server and a private DNS server?

  1. Public DNS servers are accessible to anyone on the internet, while private DNS servers are only accessible to authorized users.

  2. Public DNS servers are managed by internet service providers, while private DNS servers are managed by organizations.

  3. Public DNS servers are used to resolve DNS queries for public domains, while private DNS servers are used to resolve DNS queries for private domains.

  4. Public DNS servers are more secure than private DNS servers.

Show answer
Correct Option: A
Explanation:

Public DNS servers are accessible to anyone on the internet, while private DNS servers are only accessible to authorized users within a specific organization or network.

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