CompTIA Exam 220-1101 Topic 2 Question 26 Discussion

DHCP (Dynamic Host Configuration Protocol) is a network service that automatically assigns IP addresses and other configuration parameters to devices that request them. DHCP simplifies the management of IP addresses and avoids conflicts and errors67. An APIPA (Automatic Private IP Addressing) is a feature of Windows that assigns a default IP address in the range of 169.254.x.x to a device when it cannot obtain a valid IP address from a DHCP server. An APIPA indicates that there is a problem with the DHCP service or the network connectivity between the device and the DHCP server89. Therefore, the technician should investigate the DHCP service first to check if it is running, configured correctly, and has enough available IP addresses to assign. The other services are not directly related to the IP address assignment. RADIUS (Remote Authentication Dial-In User Service) is a protocol that provides centralized authentication, authorization, and accounting for network access10. AAA (Authentication, Authorization, and Accounting) is a framework that controls the access and usage of network resources11. DNS (Domain Name System) is a service that resolves domain names into IP addresses12.

Reference

6: What is DHCP (Dynamic Host Configuration Protocol)? - Definition from WhatIs.com

7: How DHCP works - Windows Server | Microsoft Docs

8: What is APIPA (Automatic Private IP Addressing)? - Definition from WhatIs.com

9: How to Fix an IP Address Conflict

10: What is RADIUS (Remote Authentication Dial-In User Service)? - Definition from WhatIs.com

11: What is AAA (authentication, authorization, and accounting)? - Definition from WhatIs.com

12: What is DNS (Domain Name System)? - Definition from WhatIs.com