1693735
Frage 1
Frage
1. Which type of cable run is most often associated with fiber-optic cable?
Antworten
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backbone cable
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horizontal cable
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patch cable
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work area cable
Frage 2
Frage
2. In most business LANs, which connector is used with twisted-pair networking cable?
Antworten
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BNC
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RJ-11
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RJ-45
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Type F
Frage 3
Frage
3. When is a straight-through cable used in a network?
Antworten
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when connecting a router through the console port
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when connecting one switch to another switch
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when connecting a host to a switch
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when connecting a router to another router
Frage 4
Frage
4. With the use of unshielded twisted-pair copper wire in a network, what causes crosstalk within the cable pairs?
Antworten
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the magnetic field around the adjacent pairs of wire
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the use of braided wire to shield the adjacent wire pairs
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the reflection of the electrical wave back from the far end of the cable
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the collision caused by two nodes trying to use the media simultaneously
Frage 5
Frage
5. Which OSI layer is responsible for binary transmission, cable specification, and physical aspects of network communication?
Antworten
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Presentation
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Transport
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Data Link
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Physical
Frage 6
Frage
6. An installed fiber run can be checked for faults, integrity, and the performance of the media by using what device?
Antworten
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light injector
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OTDR
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TDR
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multimeter
Frage 7
Frage
7. XYZ Company is installing new cable runs on their data network. What two types of cable would most commonly be used for new runs? (Choose two.)
Antworten
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coax
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Cat4 UTP
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Cat5 UTP
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Cat6 UTP
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STP
Frage 8
Frage
8. What is a possible effect of improperly applying a connector to a network cable?
Antworten
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Data will be forwarded to the wrong node.
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Data transmitted through that cable may experience signal loss.
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An improper signaling method will be implemented for data transmitted on that cable.
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The encoding method for data sent on that cable will change to compensate for the improper connection.
Frage 9
Frage
9. What are three measures of data transfer? (Choose three.)
Antworten
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goodput
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frequency
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amplitude
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throughput
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crosstalk
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bandwidth
Frage 10
Frage
Refer to the exhibit. Which type of Category 5 cable is used to make an Ethernet connection between Host A and Host B?
Antworten
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coax cable
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rollover cable
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crossover cable
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straight-through cable
Frage 11
Frage
11. In LAN installations where potential electrical hazards or electromagnetic interference may be present, what type of media is recommended for backbone cabling?
Antworten
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coax
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fiber
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Cat5e UTP
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Cat6 UTP
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STP
Frage 12
Frage
13. Which method of signal transmission uses radio waves to carry signals?
Antworten
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electrical
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optical
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wireless
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acoustic
Frage 13
Frage
14. Which characteristics describe fiber optic cable? (Choose two.)
Antworten
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It is not affected by EMI or RFI.
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Each pair of cables is wrapped in metallic foil.
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It combines the technique of cancellation, shielding and twisting to protect data.
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It has a maximum speed of 100 Mbps.
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It is the most expensive type of LAN cabling.
Frage 14
Frage
15. Which of the following is a characteristic of single-mode fiber-optic cable?
Antworten
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generally uses LEDs as the light source
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relatively larger core with multiple light paths
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less expensive than multimode
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generally uses lasers as the light source
Frage 15
Frage
16. What is considered a benefit of wireless as a media choice?
Antworten
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more host mobility
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lower security risks
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reduced susceptibility to interference
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less impact of the surroundings on the effective coverage area
Frage 16
Frage
17. Compared with UTP cable, what extra characteristic of STP cable helps reduce the effects of interference?
Antworten
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the metal braiding in the shielding
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the reflective cladding around core
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the twisting of the wires in the cable
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the insulating material in the outer jacket
Frage 17
Frage
18. What is a primary role of the Physical layer in transmitting data on the network?
Antworten
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create the signals that represent the bits in each frame on to the media
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provide physical addressing to the devices
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determine the path packets take through the network
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control data access to the media
Frage 18
Frage
19. When is a rollover cable used in a network?
Antworten
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for connecting a host to a Fast Ethernet port on a switch
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for connecting a router to another router
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for connecting two routers through their AUX ports
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for connecting to a switch through its console port
Frage 19
Frage
20. What is a purpose of the physical layer in data communication?
Antworten
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to wrap data packets into frames
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to make sure that MAC addresses are unique in each frame
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to control the access sequence of frames to the transmission media
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to convert a frame into a series of signals to be transmitted on the local media
Frage 20
Frage
21. Which data communications standard provides broadband access in a wireless network?
Antworten
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GSM
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Wi-Fi
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WiMAX
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Bluetooth
Frage 21
Frage
22. A customer installs a wireless access point at home in the closet next to the kitchen. The customer mentions that the wireless communication performance seems degraded when the cordless phone or the microwave oven is in use. What is the possible reason for this degradation?
Antworten
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The access point is close to walls.
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The cordless phone joins the WLAN and shares the available bandwidth.
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The wireless signal is in the same radio frequency range as the household devices are in.
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The access point is on the same electrical circuit as the phone base unit and microwave oven are.
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The surge of electricity when a microwave oven is in use disrupts the operation of the access point.
Frage 22
Frage
Refer to the exhibit. Which type of Category 5 cable is used to make an Ethernet connection between router RTA and router RTB?
Antworten
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coax cable
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rollover cable
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crossover cable
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straight-through cable
Frage 23
Frage
24. Which OSI layer is responsible for managing optical signals used for data communication?
Antworten
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presentation
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data link
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transport
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physical
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