Networking Quiz 4

Wireless and wired networks are both susceptible to RFI. 1) True 2) False

1) True

Wireless networks are often used to extend the reach of a wired LAN. 1) True 2) False

1) True

Which of the following conditions requires cables not to exceed a recommended maximum length? 1)Attenuation 2)Crosstalk 3)RFI 4)EMI 5)All of these choices

1)Attenuation

What is the term used that defines network cabling in the work area and between telecommunications closets and equipment rooms? 1)structured cabling 2)backbone cabling 3)horizontal wiring 4)vertical wiring 5)patch panel

1)structured cabling

What characteristic of twisted-pair cabling helps mitigate the effects of crosstalk? 1)None of these choices 2)100-ohm impedance 3)Four pairs of wire 4)Differential signals 5)Copper conductors

5)Copper conductors

Horizontal wiring from the wall jack to the patch panel should be no longer than ___________________ meters.

90

Which of the following is a wiring standard for twisted-pair cable connections? (Choose all that apply.) TIA/EIA 568A ISO/IEC 11801 IEEE 802.3b TIA/EIA 568B IEEE 802.3a

TIA/EIA 568A TIA/EIA 568B

A crossover cable is used between like devices, devices that transmit and receive on the same pins - computer to router, computer to computer, or switch to switch. 1) True 2) False

1) True

Because fiber-optic cabling uses light pulses instead of electrical signals, it is immune to interference and highly resistant to eavesdropping. 1) True 2) False

1) True

Fiber-optic cable is immune to electromagnetic interference (EMI). 1) True 2) False

1) True

Fiber-optic cabling is immune to EMI and RFI and almost impervious to eavesdropping. 1) True 2) False

1) True

There are two basic categories of physical cabling used in Ethernet networks. They are copper wire and fiber optic. 1) True 2) False

1) True

The space between a false ceiling and the true ceiling where heating and cooling air circulates is called the ______________. 1) Plenum 2) Return air 3) None of these choices 4) Conduit 5) Duct-equivalent airspace

1)Plenum

The frequency at which a wireless network operates is measured in cycles per second and is expressed as what unit of measurement? 1)hertz 2)bandwidth 3)All of these choices 4)meters 5)bps

1)hertz

How many strands of fiber-optic cable are needed for a network connection? 1)3 2)2 3)4 4)1 5)None of these choices

2) 2

A crossover cable is a patch cable that is made with the same wiring standard, either 586A or 586B, on both ends, so that the transmitting and receiving wires are the in the same position on both. 1) True 2) False

2) False

A straight-through cable is used between like devices, devices that transmit and receive on the same pins - hub to hub, hub to switch, or switch to switch. 1) True 2) False

2) False

A transceiver is not required when interconnecting a wireless network and a cabled network. 1) True 2) False

2) False

Fiber-optic cabling is immune to EMI and RFI but is vulnerable to eavesdropping. 1) True 2) False

2) False

Structured cabling is a standard that specifies how cabling should be installed in a network. It is based on a physical mesh topology. 1) True 2) False

2) False

The connectors and test equipment required for fiber termination are considerably less expensive than their copper counterparts. 1) True 2) False

2) False

The length of cable between the wall jack and a patch panel is called vertical cabling. 1) True 2) False

2) False

Which fiber-optic media type uses light-emitting diodes (LEDs) instead of lasers? 1) Multicore fiber (MCF) 2) Multimode fiber (MMF) 3) Singlecore fiber (SCF) 4) None of these choices 5) Singlemode fiber (SMF)

2) Multimode fiber (MMF)

What is the way in which bit signals are represented on the network medium? 1)terminating 2)encoding 3)encapsulating 4)access method 5)decoding

2)encoding

Which of the following is not a type of infrared LAN technology? 1) Scatter infrared networks 2) Line-of-sight networks 3) Laser networks 4) Reflective wireless networks 5) None of these choices

3) Laser networks

What is the maximum bandwidth for a network cabled using category 5e UTP cable? 1)10 Mbps 2)None of these choices 3)1000 Mbps 4)100 Mbps 5)16 Mbps

3)1000 Mbps

What type of wireless technology is used for 802.11b /g /n networks? 1) narrowband radio 2) All of these choices 3) broadband radio 4) spread-spectrum radio 5) narrowband and broadband radio

4) spread-spectrum radio

When a signal travels across network medium, it signal loses strength the further it gets from the transmitting station, to the point where the receiving station can no longer interpret the signals correctly. What is the term for this phenomenon? 1)radio frequency interference 2)electromagnetic interference 3)latency 4)crosstalk 5)None of these choices

5) None of these choices. It should be Attenuation.

Which of the following connections might require a crossover cable? 1)All of these choices 2)switch to computer 3)router to switch 4)hub to computer 5)switch to switch

5) switch to switch

Which of the following is not one of the main differences between the types of network cabling? 1)None of these choices 2)the speed at which the signal can be sent 3)the type of signal that the media can transmit 4)the distance that a signal can travel 5)the ability to send and receive signals

5)the ability to send and receive signals

Which of the following is a tool needed to make a patch cable? (Choose all that apply.) Cable stripper Type 110 punchdown tool Crimping tool Patch panel Punchdown block

Cable stripper Crimping tool

You're preparing to install a conventional Ethernet network in your new office building, but your boss tells you to be ready to handle a switchover to 1 Gbps Ethernet next year. What types of cable could you install? (Choose all that apply.) Cat 6 Cat 4e Cat 4 Fiber optic Cat 5

Cat 6 Fiber optic

Which of the following categories of UTP cabling are considered to be data grade as specified by ANSI/TIA/EIA? (Choose all that apply.) Category 4e Category 3 Category 5 Category 6 Category 4

Category 5 Category 6 Category 4

Where are you most likely to find vertical cabling? (Choose all that apply.) Work area's wall jack to TC Connecting TCs Equipment rooms Workstation to wall plate In the work area

Connecting TCs Equipment rooms

Which of the following is UTP susceptible to? (Choose all that apply.) Collisions Crosstalk EMI Bleed over Latency

Crosstalk EMI

Which of the following is a component of a structured cabling system? (Choose all that apply.) RJ-11 connectors Horizontal wiring Multiplexer/demultiplexer Distribution racks Patch cables

Horizontal wiring Distribution racks Patch cables

Which of the following is a characteristic of unshielded twisted-pair cable? (Choose all that apply.) Is susceptible to electrical interference Relatively expensive Consists of four wires Has a distance limitation of 100 meters Commonly used in physical bus topologies

Is susceptible to electrical interference Has a distance limitation of 100 meters

Which type of wireless network requires a clear line of sight between transmitter and receiver? (Choose all that apply.) Spread-spectrum LAN 802.11 Laser Narrowband radio Infrared

Laser Infrared

Which of the following is a common characteristic of a networking medium? (Choose all that apply.) Maximum segment length Interference susceptibility Bandwidth rating Scope Frame type

Maximum segment length Interference susceptibility Bandwidth rating

Which UTP limitations can be solved by fiber-optic cable? (Choose all that apply.) Installation cost Ease of installation Segment length EMI susceptibility Bandwidth

Segment length EMI susceptibility Bandwidth

The cables and connectors tying a network together are collectively referred to as the _____.

cable plant

When copper wires are bundled together, they are susceptible to ____________, a form of interference where the signals leak out onto other wires.

crosstalk

The _____ point is where an organization's LAN equipment ends and a third-party provider's equipment and cabling begins.

demarcation point

When electric signals travel across copper wires, they create an electrical field that can be detected outside of the wires. Using the right equipment, this field can be intercepted and interpreted. The act of intercepting this electrical field is known as _____.

eavesdropping

_____ is the process that determines how bits are represented on the medium.

encoding

Which of the following are components of a network that are defined by structured cabling? (Choose all that apply.) entrance facility switch panel work area demarcation point horizontal wiring

entrance facility work area horizontal wiring