Virtual Labs

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Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Contributors

Feedback

Domain Name System

Choose difficulty:

Beginner

Intermediate

Advanced

Which DNS server is responsible for handling domain extensions like '.com' and '.org'?

a: Root DNS server Explanation

Explanation

b: Top-Level Domain (TLD) DNS server Explanation

Explanation

c: Authoritative DNS server Explanation

Explanation

d: Recursive DNS server Explanation

Explanation

What is the primary role of an authoritative DNS server?

a: To resolve all DNS queries from clients Explanation

Explanation

b: To store and provide final IP resolutions for domains Explanation

Explanation

c: To act as a backup for the root DNS servers Explanation

Explanation

d: To manage internet traffic congestion Explanation

Explanation

What does the TTL (Time-To-Live) field in a DNS record specify?

a: The time after which the DNS record expires Explanation

Explanation

b: The priority of the DNS query Explanation

Explanation

c: The security level of a DNS response Explanation

Explanation

d: The number of recursive queries allowed Explanation

Explanation

Which of the following best describes an iterative DNS query?

a: The server handles the entire query process and returns the final answer Explanation

Explanation

b: The server refers the client to another DNS server instead of resolving it itself Explanation

Explanation

c: The server provides encrypted responses for enhanced security Explanation

Explanation

d: The server caches the results for permanent storage Explanation

Explanation

Which protocol is used by DNS to communicate over the network?

a: TCP Explanation

Explanation

b: UDP Explanation

Explanation

c: Both TCP and UDP Explanation

Explanation

d: ICMP Explanation

Explanation

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