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Thursday, June 9, 2011

CCNA Exploration 1: Network Fundamentals – Chapter 8 Exam

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

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