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Difficulty: EasyDNS Lookup and Name Resolution Roles in Enterprise Networks

In an enterprise network environment, host computers rely on various network services to locate resources efficiently. Which fundamental role is performed by a Domain Name System (DNS) server during host-to-host communications?

  1. Mapping human-readable hostnames to their corresponding network IP addressesAnswer
  2. B
    Assigning dynamic IP addressing and default gateway configuration to client hosts
  3. C
    Translating internal private IPv4 addresses into a public IPv4 address for Internet transit
  4. D
    Managing sequence numbers, acknowledgments, and flow control during transport layer sessions

Answer

The correct role performed by a DNS server is mapping human-readable hostnames to their corresponding network IP addresses.
The option stating 'Mapping human-readable hostnames to their corresponding network IP addresses' is correct because DNS serves as the protocol responsible for resolving computer hostnames and domain names into IP addresses so that network devices can route traffic to the intended destination.

Step-by-Step Solution

1
Identify the primary requirement
Network protocols require numerical IP addresses for routing packets across networks, but users use hostnames.
Host computers need a mechanism to convert friendly hostnames into layer 3 IP addresses.
2
Evaluate the role of DNS
DNS operates as a distributed database providing name-to-address resolution.
When a host queries a DNS server with a name, the server responds with the matching A or AAAA record containing the destination IP address.

Key Concept

DNS Name Resolution
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Topics

DNS Lookup and Name Resolution Roles in Enterprise Networks

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