正解:A,D
Punch-down blocks are commonly used to terminate and manage cabling for telephone systems and Ethernet networks (e.g., Cat 5, Cat 6). These blocks allow for efficient organization and connection of wires.
* Why Not B (Fiber): Fiber cables use specialized connectors (e.g., SC, LC) and are not terminated with punch-down blocks.
* Why Not C (HDMI): HDMI cables are pre-terminated and not designed for punch-down termination.
* Why Not E (Coaxial): Coaxial cables use screw-type or compression connectors, not punch-down blocks.
* Why Not F (USB): USB cables are also pre-terminated with proprietary connectors.
CompTIA A+ Exam Reference: Core 1 (220-1101), Section 3.1, cable termination techniques.