A service set identifier (SSID) is a name that identifies a wireless network12.
A wireless network can have multiple SSIDs, each with different settings and security parameters, to create separate logical networks for different purposes or users12.
However, having multiple SSIDs can also create some challenges, such as increased management overhead, reduced bandwidth, and interference12.
A technician can consolidate a topology with multiple SSIDs into one unique SSID deployment, by using a single SSID for the entire wireless network and applying different policies or profiles based on other criteria, such as user roles, device types, or locations12.
One of the benefits of having a unique SSID deployment is that it enables seamless roaming, which is the ability of a wireless device to move from one access point (AP) to another without losing connectivity or experiencing delays12.
Seamless roaming is possible after this new configuration, because the device does not need to scan for and authenticate with different SSIDs as it moves across the network, but can simply switch to the best available AP that shares the same SSID12.
The other options are not features that will be possible after this new configuration, because they are either unrelated or unaffected by the SSID deployment:
B . A basic service set (BSS) is a group of wireless devices that communicate with a single AP3. It is not a feature that will be possible after this new configuration, because it is a basic unit of a wireless network that does not depend on the SSID deployment3.
CWi-Fi Protected Access (WPA) is a security protocol that encrypts and authenticates wireless data transmissions4. It is not a feature that will be possible after this new configuration, because it is a security option that can be applied to any SSID deployment, regardless of the number of SSIDs4.
D . Multi-user multiple-input multiple-output (MU-MIMO) is a technology that allows an AP to transmit data to multiple devices simultaneously, increasing the network efficiency and performance. It is not a feature that will be possible after this new configuration, because it is a technology option that can be supported by any SSID deployment, as long as the AP and the devices are compatible with it.
Reference:
1: Wireless LAN Topologies - N10-008 CompTIA Network+ : 3.1
2: CompTIA Network+ N10-008 Full Course for Beginners - Wireless LAN Topologies (3.1)
3: Wireless Network Types - N10-008 CompTIA Network+ : 3.1
4: Wireless Security Protocols - N10-008 CompTIA Network+ : 3.2
5: Wireless Technologies - N10-008 CompTIA Network+ : 3.3