Explanation
RG-6 is a type of coaxial cable that is commonly used by cable companies to provide Internet access from the demarcation point back to the central office. It has a thicker conductor and better shielding than RG-59, which is another type of coaxial cable. Multimode and Cat 5e are types of fiber optic and twisted pair cables respectively, which are not typically used by cable companies. Cat 6 and 100BASE-T are standards for twisted pair cables, not types of cabling.

The management plane is responsible for managing and controlling network devices. Let's evaluate the options:
Routing table: Part of the control plane, used for making forwarding decisions.
Current configuration: Part of the management plane. It includes settings, access control lists, and other configuration details.
File operations: Typically part of the management plane. It involves tasks like uploading/downloading configurations, firmware updates, and backups.
Console port: Also part of the management plane. It provides direct access to the device for configuration and troubleshooting.
Among the options, the one most closely associated with the management plane is the current configuration.

Explanation
802.1X is a standard that enables the use of an AAA server in a domain environment by providing port-based network access control. 802.1X authenticates users or devices before granting them access to the network resources, and can also authorize them based on their roles or policies. 802.1X can work with different AAA protocols, such as RADIUS or TACACS+, to communicate with the AAA server.
References:
CompTIA Network+ N10-008 Certification Study Guide, page 211
CompTIA Network+ N10-008 Cert Guide, Deluxe Edition, page 382
Configuring AAA Services - Cisco3

Explanation
The default gateway is the IP address of the router that connects the PC to other networks. The default gateway should be on the same subnet as the PC's IPv4 address. However, in this case, the default gateway is
192.168.9.1, which is on a different subnet than the PC's IPv4 address of 192.168.8.15. Therefore, the default gateway configuration on the PC is incorrect and prevents the PC from reaching the file server on another subnet.