Reference: CompTIA Network+ Certification Exam Objectives - Network Security section.

Reference: CompTIA Network+ Certification Exam Objectives - IP Addressing section.

When multiple redundant links exist between switches, Spanning Tree Protocol (STP) is required to prevent switching loops. STP blocks redundant paths but can allow aggregation if configured with protocols like LACP.
B). SVIs provide Layer 3 interfaces, not loop prevention.
C). Native VLAN defines the untagged VLAN but does not manage loops.
D). FHRP (VRRP, HSRP, GLBP) provides gateway redundancy, not switch uplink management.
References (CompTIA Network+ N10-009):
Domain: Network Infrastructure - STP, redundancy, loop prevention.

Availability refers to ensuring that data is accessible when needed. If a customer's data is accidentally deleted, it impacts availability, as the data can no longer be accessed.

Console Access:
Purpose: Console access to a switch allows administrators to configure and manage the device directly. This is typically done using a terminal emulator program on a computer.
RJ45 Connector:
Common Use: The RJ45 connector is widely used for Ethernet cables and also for console connections to network devices like switches and routers.
Console Cables: Console cables often have an RJ45 connector on one end (for the switch) and a DB9 serial connector on the other end (for the computer).
Comparison with Other Connectors:
ST (Straight Tip): A fiber optic connector used for networking, not for console access.
BNC (Bayonet Neill-Concelman): A connector used for coaxial cable, typically in older network setups and not for console access.
SFP (Small Form-factor Pluggable): A modular transceiver used for network interfaces, not for console access.
Practical Application:
Connection Process: Connect the RJ45 end of the console cable to the console port of the switch. Connect the DB9 end (or USB via adapter) to the computer. Use a terminal emulator (e.g., PuTTY, Tera Term) to access the switch's command-line interface (CLI).
References:
CompTIA Network+ study materials on network devices and connectors.