If a customer added an Apple TV in their conference room so that employees can easily share their screen but the Apple TV cannot be discovered by the employees' devices, two settings that could be causing this problem are MDNS and Broadcast/Multicast. So the correct answers are A. MDNS and B. Broadcast
/Multicast.

According to Wikipedia1, 802.1X is an IEEE Standard for port-based network access control (PNAC). It provides an authentication mechanism to devices wishing to attach to a LAN or WLAN using Extensible Authentication Protocol (EAP) over wired IEEE 802 networks and over 802.11 wireless networks, which is known as "EAP over LAN" or EAPOL.
The authentication process involves three parties: a supplicant (the client device), an authenticator (the network device such as an access point), and an authentication server (typically a RADIUS server). The supplicant must provide valid credentials to the authenticator before it can access the network resources.
The credentials are exchanged with a RADIUS server prior to the 4-way Handshake because the 4-way Handshake is used to establish encryption keys between the supplicant and authenticator after successful authentication2. The credentials are exchanged with a RADIUS server after the 802.11 Association because the 802.11 Association is used to establish a logical link between the supplicant and authenticator before authentication can take place3.

Within the Juniper Mist AI ecosystem, telemetry data and network activities are organized into distinct categories to facilitate efficient troubleshooting and monitoring. While "Organization" (A) represents a management hierarchy and "Security" (C) is a functional domain (such as Rogue AP detection or WxLAN policies), Mist specifically filters operational events into three primary categories: Site, AP (Access Point), and Client. These categories are reflected across the Mist dashboard, particularly within the Insights and Monitor views.
Site Events (E) represent macro-level issues that affect the entire physical location or a significant portion of the network infrastructure. Examples include DHCP server unreachable errors, DNS latency spikes, or site- wide configuration changes. These events are crucial for identifying systemic problems that originate from the wired side of the network or the local environment rather than individual wireless devices.
AP Events (B) focus on the health and status of the hardware itself. This category includes events such as AP reboots, firmware upgrades, Ethernet link toggling (up/down), and radio failures. By filtering for AP-specific events, administrators can quickly determine if a connectivity issue is localized to a specific hardware unit or a PoE power supply problem.
Client Events (D) provide the most granular level of visibility, tracking the specific journey of an end-user device. This includes the entire 802.11 state machine: association, authentication, and DHCP handshake.
Client events are further classified as "Good," "Bad," or "Neutral," allowing Marvis AI to correlate failures (like an incorrect PSK or a slow DHCP response) to a specific user session. This three-tiered event structure- Site, AP, and Client-is the foundation of Mist's AI-driven root cause analysis, enabling the system to pinpoint exactly where in the stack a failure occurred.

According to the Cisco Catalyst 9800 Series Wireless Controller Software Configuration Guide2, you can create a new site configuration under the location hierarchy level in the Juniper Mist UI. A site is a logical grouping of devices based on physical location or other criteria.
References: https://www.cisco.com/c/en/us/td/docs/wireless/controller/9800/17-2/config-guide/b_wl_17_2_cg
/sites.html

Reference: https://www.mist.com/documentation/service-level-expectations-sle/ According to the Cisco Catalyst 9800 Series Wireless Controller Software Configuration Guide1, the Wireless Assurance SLE that provides information on Opportunistic Key Caching (OKC) is Roaming. OKC is a fast roaming technique that allows wireless clients and the WLAN infrastructure to cache only one PMK for client association with a WLAN, even when roaming between multiple APs.
References: https://www.cisco.com/c/en/us/td/docs/wireless/controller/9800/17-2/config-guide/b_wl_17_2_cg
/_opportunistic_key_caching.html