Cisco Certified Internetwork Expert (CCIE) Practice Test 2025 - Free CCIE Practice Questions and Study Guide

The Connection-Oriented Access (CoA) Request in RADIUS plays a pivotal role in managing user sessions after authentication has taken place. Specifically, its main function revolves around controlling bandwidth allocation for an active user session. This capability allows network administrators to dynamically adjust the resources available to a user based on policy changes or current network conditions.

The CoA Request is particularly useful in scenarios where real-time adjustments are necessary, such as when a user exceeds their allocated bandwidth or when the network needs to reallocate resources to maintain optimal performance. By enabling on-the-fly adjustments to user bandwidth, CoA enhances the overall user experience while ensuring that network resources are utilized efficiently.

The other options do not encapsulate the primary function of a CoA Request. While disconnections, role changes, or timeout modifications are important aspects of user session management, they do not reflect the specific purpose of the CoA Request, which is primarily focused on bandwidth control. Therefore, understanding the nuances of CoA Requests is essential for effective network management within a RADIUS environment.