VRRP is an open, standards-based protocol that provides IP gateway redundancy by allowing multiple routers to share a virtual IP address, with one acting as the active gateway.

The VRRP preempt feature allows a higher-priority router to reclaim the master role after it recovers from a failure. Without preemption, the current master remains master even when the original higher-priority device returns to service. Enabling preemption ensures the preferred device resumes its primary role once it becomes available again.

Strict queuing is the best scheduling technology for ensuring that voice traffic, which is sensitive to latency, is prioritized above other types of traffic. This method ensures that voice traffic is sent first before other queued traffic, effectively reducing the possibility of delay.

The status of "ALFOE" means that LACP Link Aggregation Control Protocol (LACP) is a network protocol that provides dynamic negotiation of link aggregation between two devices. LACP allows multiple physical links to be combined into a single logical link for increased bandwidth, redundancy, and load balancing. LACP is defined in IEEE 802.3ad standard. is working fine with no problems when checking LACP with "show lacp interfaces".
The status of "ALFOE" is an acronym that stands for:
- A: Active - The interface is actively sending LACP packets to negotiate link aggregation with the peer device.
- L: Link Up - The interface has physical connectivity with the peer device.
- F: Aggregatable - The interface can be aggregated with other interfaces into a single logical link.
- O: Synchronized - The interface has successfully negotiated link aggregation parameters with the peer device and can transmit or receive traffic on the logical link.
- E: Collecting/Distributing - The interface is collecting incoming traffic from the peer device and distributing outgoing traffic to the peer device on the logical link.
The other options are not correct because:
- The interface on the local switch is configured as static-LAG: This option is false because static- LAG does not use LACP to negotiate link aggregation. Static-LAG requires manual configuration of link aggregation parameters on both devices and does not have any status indicators.
- LACP is not configured on the peer side: This option is false because if LACP is not configured on the peer side, the status of the interface would be "ALF? instead of "ALFOE". This means that the interface would not be synchronized or collecting/distributing with the peer device.
- LACP is in a synchronizing process: This option is false because if LACP is in a synchronizing process, the status of the interface would be "ALF-O" instead of "ALFOE". This means that the interface would not be collecting/distributing with the peer device.

A single SSID with MPSK supports many device-specific or group-specific passphrases and can map each IoT class to the appropriate role-based security policy. Using 2.4 GHz is required for
802.11b-only devices, while 5 GHz helps optimize performance for capable clients.