The correct answer to the question "What provides centralized control of authentication and roaming in an enterprise network?" is B - a wireless LAN controller.
A wireless LAN (Local Area Network) controller (WLC) is a device that provides centralized control and management of multiple wireless access points (APs) in a wireless network . It is responsible for configuring and monitoring the access points, managing the wireless traffic, and providing security protocols such as authentication and encryption. The WLC also enables seamless roaming between the access points without the need for reauthentication, as it maintains a centralized database of user credentials and authentication information.
Therefore, in an enterprise network, a wireless LAN controller provides centralized control of authentication and roaming for wireless clients .
AP MAC Functions:
- Beacons and probe responses
- Packet acknowledgments and retransmissions
- Frame queueing and packet prioritization
- MAC layer data encryption and decryption
WLC MAC Functions:
- Authentication *
- Association and re-association of roaming clients *
- Frame translation to other protocols
- Termination of 802.11 traffic on a wired interface
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