200-301 Question #275: Real Exam Question with Answer & Explanation

Question

What are two roles of Domain Name Services (DNS)? (Choose Two)

Options

• Abuilds a flat structure of DNS names for more efficient IP operations
• Bencrypts network Traffic as it travels across a WAN by default
• Cimproves security by protecting IP addresses under Fully Qualified Domain Names (FQDNs)
• Denables applications to identify resources by name instead of IP address
• Eallows a single host name to be shared across more than one IP address

Explanation

DNS primarily translates human-readable domain names into IP addresses and can map a single hostname to multiple IP addresses for load balancing or redundancy.

Common mistakes.

• A. DNS uses a hierarchical, not flat, structure to organize names, which is crucial for its scalability and distributed management.
• B. DNS itself does not encrypt network traffic; that function is handled by protocols like TLS/SSL at higher layers.
• C. While DNS is fundamental to network communication, its primary role is not to improve security by protecting IP addresses, although it does abstract them.

Concept tested. DNS roles and functions

Reference. https://learn.microsoft.com/en-us/windows-server/networking/dns/dns-overview

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