QoS stands for Quality of Service, which is a feature that allows you to prioritize network traffic based on the type of traffic, such as voice, video, data, or gaming. QoS can help improve the performance and reliability of critical applications by allocating more bandwidth and lower latency to them, while reducing the impact of less important or non-essential traffic1.
VPN stands for Virtual Private Network, which is a technology that creates a secure and encrypted connection between two or more devices over the Internet. VPN can help protect your privacy and data from hackers, ISPs, and government surveillance, as well as access geo-restricted content and services2.
CDN stands for Content Delivery Network, which is a network of servers that deliver web content to users based on their geographic location, the origin of the content, and the performance of the network. CDN can help improve the speed and availability of web content, such as images, videos, and scripts, by caching them on servers closer to the users3.
TTL stands for Time To Live, which is a value that determines how long a packet can stay in a network before it is discarded or returned. TTL can help prevent network congestion and loops by limiting the lifespan of packets that are lost, corrupted, or delayed4.

The switch processes the data by flooding it out of every port, except the one on which it came in. Flooding is a process where a switch sends a data frame to all ports except the source port when it does not have an entry for the destination MAC address in its MAC address table. Flooding allows the switch to learn the MAC addresses of the devices connected to its ports and update its MAC address table accordingly. Flooding also ensures that the data frame reaches its intended destination, even if the switch does not know its location. Reference: https://www.cisco.com/c/en/us/support/docs/lan-switching/spanning-tree-protocol/10556-16.html

2.4GHz frequency has better penetration and range than higher frequencies in forested environments, where there are many obstacles and interference sources.
Reference:
Wireless in The Woods: Experimental Evaluation of IEEE 802.11a/b/g in Forested Environments1 High-Speed Wireless Access in Forested Rural Areas Using Analog Radio Over Fiber2

A basic service set (BSS) is a group of wireless devices that share the same service set identifier (SSID) and communicate with each other through a single access point (AP). A BSS is also known as an infrastructure mode network1.
An extended service set (ESS) is a group of two or more BSSs that are connected by a distribution system (DS), such as a switch or a router. An ESS allows wireless devices to roam between different APs and maintain network connectivity. An ESS is also known as a wireless LAN (WLAN)2.
An independent basic service set (IBSS) is a group of wireless devices that communicate with each other directly without using an AP or a DS. An IBSS is also known as an ad hoc network or a peer-to-peer network3.
MU-MIMO (Multi-User Multiple-Input Multiple-Output) is a technology that allows an AP to transmit data to multiple wireless devices simultaneously using multiple antennas and spatial streams. MU-MIMO can improve the network efficiency and performance by reducing the waiting time and increasing the throughput4.
The scenario described in the question is an example of an IBSS, as the two laptops are connected directly to each other using 802.11ac without an AP. Therefore, the correct answer is C.
Reference:
1: BSS
2: ESS
3: IBSS
4: MU-MIMO

To assign IPv6 addresses without DHCP, the technician can use SLAAC (Stateless Address Autoconfiguration). Here's why:
SLAAC: Stateless Address Autoconfiguration allows devices to automatically configure their IPv6 addresses based on the network prefix advertised by routers. It doesn't rely on a central DHCP server for address assignment.
APIPA (Automatic Private IP Addressing): This is an IPv4 feature and not applicable for IPv6.
MAC reservation: This is related to DHCP and doesn't directly assign IPv6 addresses.
IPv4 to IPv6 tunnel: This is used for tunneling IPv6 traffic over an IPv4 network and doesn't address address assignment.
Therefore, the correct answer is A. SLAAC