CompTIA Network+ Practice Test 2026 - Free Network+ Practice Questions and Exam Prep Guide

A Domain Name Server (DNS) is a common option found in Dynamic Host Configuration Protocol (DHCP) settings. When a DHCP server assigns an IP address to a client, it can also provide additional network configuration information, including the IP address of a DNS server. This facilitates the resolution of hostnames to IP addresses, enabling users to use friendly names instead of remembering numerical IP addresses. Including this in the DHCP configuration streamlines network management and enhances user experience by ensuring that clients are automatically configured to communicate with the correct DNS servers.

In contrast, Network Address Translation (NAT) typically operates at the router level and isn’t directly included in DHCP options. Virtual LAN identification (VLAN ID) pertains to the segmentation of networks for traffic management and security purposes, which is different from the dynamic assignment of IP settings provided by DHCP. IPSec configuration is related to securing IP communications and is not part of standard DHCP options, focusing instead on encryption and integrity for data transmission. Thus, the inclusion of the DNS server option in DHCP is essential for the proper functioning of network services.