multiple choice problem about network. Thank you..

14. The T-1 line combines multiple signals using ________ for their concurrent deliveries. A. frequency division multiplexing B. time division multiplexing C. wavelength division multiplexing D. dense wave division multiplexing E. code division multiple access 15. Patch panels are used widely in the ________ to intermediate connections between end stations and switches. A. building entrance B. wiring closet C. backbone cabling area D. work area E. switch room area 16. The access (or workgroup) switch is generally placed in the ________. A. wiring closet subsystem B. work area subsystem C. horizontal cabling subsystem D. backbone cabling subsystem E. equipment room subsystem 17. When multimode and single-mode fibers are compared, A. multimode supports full-duplex transmissions, but single-mode does not. B. multimode is more reliable than single mode in maintaining signal integrity. C. single mode is easier to multiplex than multimode. D. multimode is adequate for LANs and campus network, but not for WANs. E. multimode has higher capacity than single mode. 18. Choose a CORRECT statement in comparing baseband and broadband transmissions. A. Baseband allows the flow of only a single data type (e.g., texts) at a time. B. Baseband is slower than broadband. C. Wired computer networks (e.g., Ethernet) primarily rely on broadband transmissions. D. With baseband, several frequency channels can be created within a cable. E. Using broadband, analog signals can travel through a cable concurrently. 19. The ________ is used to make a physical connection between two closely placed network nodes. A. parallel cord B. patch cord C. conversion cord D. horizontal cord E. vertical cord