A captive portal is a web page that is presented to a user before they are allowed to access a network. It is used to authenticate users and to ensure that all users have accepted the terms of use for the network. By deploying a captive portal, the cafeteria can require users to enter their phone number as the passphrase, while still providing an additional layer of security. Reference: CompTIA Network+ Study Guide, 8th Edition, page 182.

BGP stands for Border Gateway Protocol, and it is the standard protocol for exchanging routing information between different autonomous systems (AS) on the internet12. An AS is a network or a group of networks under a single administrative control, such as an ISP or a large enterprise12.
BGP is an Exterior Gateway Protocol (EGP), which means it is used to communicate with routers outside the local network or AS12. BGP allows each AS to advertise its own routes and policies to other ASes, and to learn the best routes to reach any destination on the internet12.
BGP is generally used by major ISPs for handling large-scale internet traffic because it is highly scalable, flexible, and reliable12. BGP can handle millions of routes and thousands of ASes, and it can support various routing policies and preferences12. BGP also has mechanisms to detect and avoid routing loops, and to recover from network failures12.
The other options are not suitable for handling large-scale internet traffic across different ASes. RIP (Routing Information Protocol) and EIGRP (Enhanced Interior Gateway Routing Protocol) are both Distance Vector protocols, which means they use the number of hops as the metric to find the best route34. They are also Interior Gateway Protocols (IGP), which means they are used to communicate with routers within the same network or AS34. RIP and EIGRP are not scalable or flexible enough to handle the complexity and diversity of the internet34. OSPF (Open Shortest Path First) is a Link State protocol, which means it uses the speed and cost of the links as the metric to find the best route5. It is also an IGP, which means it is used to communicate with routers within the same network or AS5. OSPF is more scalable and flexible than RIP and EIGRP, but it still has limitations in handling large-scale internet traffic across different ASes5. Reference:
1: CompTIA Network+ N10-008 Certification Study Guide, Chapter 3: Routing, Section 3.4: BGP6
2: Professor Messer's CompTIA N10-008 Network+ Course Notes, Page 18: BGP7
3: CompTIA Network+ N10-008 Certification Study Guide, Chapter 3: Routing, Section 3.2: RIP and EIGRP6
4: Professor Messer's CompTIA N10-008 Network+ Course Notes, Page 16: RIP and EIGRP7
5: CompTIA Network+ N10-008 Certification Study Guide, Chapter 3: Routing, Section 3.3: OSPF6
6: CompTIA Network+ N10-008 Certification Study Guide2
7: Professor Messer's CompTIA Network+ N10-008 Training Course5

NS stands for Name Server, and it is a DNS record that specifies which servers are authoritative for a domain. The registrar is the entity that manages the domain registration and delegation, and it maintains the NS records for each domain. To change where the outside DNS records are hosted, the network administrator needs to change the NS records at the registrar to point to the new DNS servers that will host the outside DNS records.
Reference:
DNS Record Types - N10-008 CompTIA Network+ : 1.61
CompTIA Network+ N10-008 Cert Guide, page 1472

The question asks about the configuration that can fulfill the requirement of logging and archiving all communication destined to a secure server.
Logging and archiving are methods of capturing and storing network traffic for analysis, monitoring, auditing, or compliance purposes.
One way to log and archive network traffic is by using port mirroring, which is a feature that allows a switch to copy the traffic from one or more source ports to a destination port, where a device such as a network analyzer, a firewall, or a storage device can capture and process the traffic.
Port mirroring can be configured to mirror traffic based on various criteria, such as VLANs, MAC addresses, IP addresses, or protocols. Port mirroring can also be done on a remote switch, using protocols such as RSPAN (Remote Switched Port Analyzer) or ERSPAN (Encapsulated Remote Switched Port Analyzer).
Therefore, the answer is B, port mirroring, as it can log and archive all communication destined to a secure server by mirroring the traffic from the source ports to a storage device.
Reference:
CompTIA Network+ N10-008 Study Guide, Chapter 2: Network Devices and Technologies, Section 2.2: Switching Technologies, Pages 86-87 Professor Messer's CompTIA N10-008 Network+ Course, Video 2.2: Switching Technologies, Part 2 Network + N10-008 practice exam, Question 961, Answer B, Explanation

The question asks about the best configuration for the WLAN being tested, which involves channel bonding on an 802.11ac AP. Channel bonding is a technique that combines two or more adjacent channels into a wider channel to increase the bandwidth and throughput of the wireless network1.
The answer is to set up the AP to perform a dynamic selection of the frequency according to regulatory requirements. This means that the AP will automatically choose the best available channel and adjust the transmit power based on the local regulations and the interference level2. This way, the AP can avoid using the channels that are occupied by the government radio system, which may have higher priority and authority over the spectrum3.
Upgrading the equipment to an AP that supports manual configuration of the EIRP power settings is not the best solution, because it does not address the channel selection issue. EIRP stands for Effective Isotropic Radiated Power, which is the total power radiated by the antenna in all directions. Manual configuration of the EIRP may allow the administrator to increase or decrease the signal strength, but it may also violate the regulatory limits or cause more interference with other devices.
Switching to 802.11n, disabling channel auto-selection, and enforcing channel bonding on the configuration is also not the best solution, because it may degrade the performance and compatibility of the WLAN. 802.11n is an older standard than 802.11ac, which has lower maximum data rates and fewer features. Disabling channel auto-selection may prevent the AP from adapting to the changing environment and finding the optimal channel. Enforcing channel bonding may increase the bandwidth, but it may also increase the interference and reduce the number of available channels.
Deactivating the band 5GHz to avoid interference with the government radio is not the best solution, because it may limit the functionality and capacity of the WLAN. The 5GHz band has more channels and less congestion than the 2.4GHz band, which makes it suitable for high-performance applications and devices. Deactivating the band 5GHz may force the WLAN to use only the 2.4GHz band, which may reduce the speed, range, and reliability of the wireless network. Reference:
Channel Bonding
Dynamic Frequency Selection
Radio Regulations
[EIRP Calculator]
[EIRP and Regulatory Domains]
[802.11n vs 802.11ac]
[Channel Auto-Selection]
[Channel Bonding and Interference]
[5GHz vs 2.4GHz]
[5GHz Band Deactivation]