The most likely cause of the intermittent connectivity issues when specific Wireless Access Points (WAPs) are turned on and share channel five is interference. Wireless interference occurs when multiple devices operate on the same channel within close proximity to each other, leading to signal congestion and reduced performance. This type of interference can cause the connectivity to be sporadic, as described. Other options like polarization, incorrect channel (since they are on the intended channel), or low power levels would generally not cause intermittent issues strictly when WAPs are turned on.

Network Time Protocol (NTP): NTP is a widely adopted protocol for synchronizing clocks across network devices. It ensures that all devices have accurate and consistent time. NTP uses a hierarchical system of time sources to maintain synchronization.
Reference:
Professor Messer - Network+ Certification Course
CompTIA Network+ N10-008 Study Guide
Auvik - Network Time Synchronization: Why and How It Works

A false camera is a dummy device that looks like a real camera but does not actually record or transmit any video. It is used to deter potential intruders or attackers from entering or damaging a building by creating the illusion of surveillance. Therefore, it is a preventive measure that aims to reduce the likelihood or impact of a security breach. It is not a detection, recovery, or identification tool, as it does not alert, restore, or recognize any security incidents.
Reference:
[CompTIA Network+ N10-008 Certification Study Guide], Chapter 6: Network Security, Section 6.1: Physical Security, pp. 317-318
[Professor Messer's CompTIA N10-008 Network+ Course Notes], Section 6.1: Physical Security, p. 79
[Professor Messer's CompTIA N10-008 Network+ Training Course], Video 6.1: Physical Security, 5:25 minutes

EIGRP stands for Enhanced Interior Gateway Routing Protocol, which is a hybrid routing protocol that uses a successor and a feasible successor to determine the best route to a destination. A successor is the next-hop router that has the lowest cost (or metric) to reach the destination, and a feasible successor is a backup router that has a cost that is less than the cost of the successor. EIGRP uses the successor and the feasible successor to achieve fast convergence and load balancing. EIGRP also uses a Diffusing Update Algorithm (DUAL) to maintain the routing table and avoid routing loops. IS-IS, OSPF, and BGP are other routing protocols that do not use a successor and a feasible successor, but rather use different algorithms and criteria to select the best route.
Reference
1: EIGRP - N10-008 CompTIA Network+ : 2.1
2: CompTIA Network+ N10-008 Certification Study Guide, page 150-151
3: CompTIA Network+ N10-008 Exam Subnetting Quiz, question 20
4: CompTIA Network+ N10-008 Certification Practice Test, question 9

A split tunnel VPN solution would allow secure, remote access for sales staff to the CRM application without impacting videoconferencing traffic. A VPN stands for virtual private network, which is a secure connection between two or more devices over a public network, such as the internet. A VPN encrypts and authenticates the data, ensuring its confidentiality and integrity. A split tunnel VPN is a type of VPN that allows some traffic to go through the VPN tunnel, while other traffic goes directly to the internet. This can improve performance and bandwidth utilization by reducing unnecessary encryption and routing overhead. By using a split tunnel VPN, sales staff can access the CRM application that connects to a database server in the corporate data center through the VPN tunnel, while using online videoconferencing services through their local internet connection. Reference: [CompTIA Network+ Certification Exam Objectives], What Is Split Tunneling? | NordVPN