CCNA: Cisco Certified Network Associate — Question 1212

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

Answer options

• A. builds a flat structure of DNS names for more efficient IP operations
• B. encrypts network Traffic as it travels across a WAN by default
• C. improves security by protecting IP addresses under Fully Qualified Domain Names (FQDNs)
• D. enables applications to identify resources by name instead of IP address
• E. allows a single host name to be shared across more than one IP address

Correct answer: D, E

Explanation

The correct answers, D and E, highlight the primary functionalities of DNS, which include translating domain names into IP addresses and allowing multiple IP addresses to be associated with a single domain name. Options A, B, and C do not accurately describe DNS roles; A incorrectly describes DNS structure, B refers to traffic encryption which is not a DNS function, and C misrepresents how DNS operates regarding IP address protection.