CCNA Exploration 1: Network Fundamentals – Chapter 8 Exam 100% common in 2010

01. Which OSI layer is responsible for binary transmission, cable specification, and physical aspects of network communication?

• Presentation
• Transport
• Data Link
• Physical

02. 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

03. 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.

04. 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

05. 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

06. Which method of signal transmission uses radio waves to carry signals?

• electrical
• optical
• wireless
• acoustic

07. In most business LANs, which connector is used with twisted-pair networking cable?

• BNC
• RJ-11
• RJ-45
• Type F

08. 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

09. 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?

* (Third one is the correct one)
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