Change management is the process and organization of enacting change in an organization to ensure a safe, productive, cost saving, and smooth transition.

Collisions occur when two or more devices try to transmit signals on the same physical medium at the same time. This causes interference and data loss. Collisions can only happen at the physical layer of the OSI model, which is responsible for transmitting and receiving raw bits over a physical medium such as a cable or a wireless channel. The physical layer does not have any mechanism to prevent or resolve collisions. Therefore, higher layers of the OSI model, such as the data link layer, need to implement protocols to detect and recover from collisions, such as CSMA/CD for Ethernet networks.
References: Collision in computer networkingData Link Layer | Layer 2 | The OSI-Model

Enterprise authentication is a method of securing wireless networks that uses an external authentication server, such as RADIUS, to verify the identity of users and devices. Enterprise authentication can provide user traceability by logging the network connections and activities of each authenticated user. This can help the organization meet its security requirement and comply with any regulations or policies that mandate user accountability12.
References:
* CompTIA Network+ N10-008 Certification Exam Objectives, page 83
* CompTIA Network+ Cert Guide: Wireless Networking, page 13

Incorrect antenna placement could cause or exacerbate attenuation and interference problems.
Use a site survey and heat map to determine the optimum position for APs and (if available) the direction in which to point adjustable antennas.

Elastic Computing. Elasticity refers to a systems ability to adjust dynamically to a changing workload.