200-301: Cisco Certified Network AssociateDemo

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QuestionQ233

IP Services

What are two functions of Domain Name Services (DNS)?

Choose two
  • 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
Explanation

DNS provides name resolution so applications and users can locate resources by host name or fully qualified domain name instead of needing to use numeric IP addresses directly. DNS also supports mapping a single host name to multiple IP addresses by publishing multiple address records for the same name, which can be used for redundancy or simple load distribution. DNS is hierarchical rather than flat, and it does not encrypt WAN traffic by default.

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