CCNA 1 - Module 8

1. Which OSI layer is responsible for binary transmission, cable specification, and physical aspects of network communication?
- Presentation
- Transport
- Data Link
- Physical

2. An installed fiber run can be checked for faults, integrity, and the performance of the media by using what device?
- light injector
- OTDR
- TDR
- multimeter

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?
- coax cable
- rollover cable
- crossover cable
- straight-through cable

6. Which method of signal transmission uses radio waves to carry signals?
- electrical
- optical
- wireless
- acoustic

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?
- generally uses LEDs as the light source
- relatively larger core with multiple light paths
- less expensive than multimode
- generally uses lasers as the light source

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.)
- goodput
- frequency
- amplitude
- throughput
- crosstalk
- bandwidth

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?
- create the signals that represent the bits in each frame on to the media
- provide physical addressing to the devices
- determine the path packets take through the network
- control data access to the media

13. In LAN installations where potential electrical hazards or electromagnetic interference may be present, what type of media is recommended for backbone cabling?
- coax
- fiber
- Cat5e UTP
- Cat6 UTP
- STP

14. What is a possible effect of improperly applying a connector to a network cable?
- Data will be forwarded to the wrong node.
- Data transmitted through that cable may experience signal loss.
- An improper signaling method will be implemented for data transmitted on that cable.
- The encoding method for data sent on that cable will change to compensate for the improper connection.

15. Which fiber connector supports full duplex Ethernet?

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