1. Which OSI layer is responsible for binary transmission, cable specification, and physical aspects of network communication? 3. Which characteristics describe fiber optic cable? (Choose two.) • It is not affected by EMI or RFI. • Each pair of cables is wrapped in metallic foil. • It combines the technique of cancellation, shielding and twisting to protect data. • It has a maximum speed of 100 Mbps. • It is the most expensive type of LAN cabling. 4. When is a straight-through cable used in a network? • when connecting a router through the console port • when connecting one switch to another switch • when connecting a host to a switch • when connecting a router to another router 5. Refer to the exhibit. Which type of Category 5 cable is used to make an Ethernet connection between Host A and Host B? 6. Which method of signal transmission uses radio waves to carry signals? 7. In most business LANs, which connector is used with twisted-pair networking cable? • BNC • RJ-11 • RJ-45 • Type F 8. Which of the following is a characteristic of single-mode fiber-optic cable? 9. Which type of cable run is most often associated with fiber-optic cable? • backbone cable • horizontal cable • patch cable • work area cable 10. What are three measures of data transfer? (Choose three.) 11. With the use of unshielded twisted-pair copper wire in a network, what causes crosstalk within the cable pairs? • the magnetic field around the adjacent pairs of wire • the use of braided wire to shield the adjacent wire pairs • the reflection of the electrical wave back from the far end of the cable • the collision caused by two nodes trying to use the media simultaneously 12. What is a primary role of the Physical layer in transmitting data on the network? 13.
In LAN installations where potential electrical hazards or
electromagnetic interference may be present, what type of media is
recommended for backbone cabling? 14. What is a possible effect of improperly applying a connector to a network cable? 15. Which fiber connector supports full duplex Ethernet? • Options three is right answer 16. What is considered a benefit of wireless as a media choice? • more host mobility • lower security risks • reduced susceptibility to interference • less impact of the surroundings on the effective coverage area 17. What characteristic of UTP cable helps reduce the effects of interference? • the metal braiding in the shielding • the reflective cladding around core • the twisting of the wires in the cable • the insulating material in the outer jacket
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