Deck 4: Structured Cabling and Networking Elements

Question 1

What is the industry standard for rack height in rack units?

A)18U
B)22U
C)42U
D)54U

Answer 1

C

Question 2

Describe the three different types of cabling recognized by TIA/EIA as acceptable for horizontal wiring.

Answer 2

TIA/EIA recognizes three possible cabling types for horizontal wiring: UTP,STP,or fiber opticcable.UTP (unshielded twisted pair)cable is a type of copper-based cable thatconsists of one or more insulated twisted-wire pairs encased in a plastic sheath.STP (shielded twisted pair)cable is atype of copper-based cable containing twisted-wire pairs that are not only individuallyinsulated,but also surrounded by a shielding made of a metallic substance such as foil.Fiber-optic cable is a form of cable that contains one or several glass or plastic fibers inits core and comes in two types: single-mode fiber (SMF)or multimode fiber (MMF).Copper-based cable transmits data via electric signals,and fiber-optic cable transmitsdata via pulsing light sent from a laser or light-emitting diode (LED).

Question 3

The radius of the maximum arc into which you can loop a cable without impairing data transmission is known as what option below?

A)metal stress factor
B)arc coefficient
C)bend radius
D)flex rating

Answer 3

C

Question 4

Which method of transmission allows signals to travel in both directions over a medium simultaneously?

A)half duplex
B)simplex
C)full-duplex
D)multiplex

Question 5

What is the maximum frame size for Ethernet II frames on a VLAN?

A)1500 bytes
B)1518 bytes
C)1522 bytes
D)1496 bytes

Question 6

Cable that is coated with flame-resistant polyvinyl chloride (PVC)is acceptable for use in plenum areas.

Question 7

A power fluctuation that results in a temporary dimming of lights is known as a blackout.

Question 8

Each type of cable has a prescribed bend radius ,which is the radius ofthe maximum arc into which you can loop a cable without impairing data transmission.

Question 9

A NIC card cannot determine whether the frames it transmits and receives are using IP packets or a different layer 3 protocol,because the NIC does not operate higher than Layer 2 of the OSI model.

Question 10

Describe the differences between a brownout and a blackout.

Question 11

Ethernet exists at what layer of the OSI model?

A)Layer 1
B)Layer 2
C)Layer 3
D)Layer 4

Question 12

Which method of transmission allows signals to travel in both directions over a medium but in only one direction at a time?

A)full duplex
B)half duplex
C)simplex
D)multiplex

Question 13

Explain how equipment should be configured in a rack to best optimize airflow and temperature.

Question 14

What type of power flaw involves a fluctuation in voltage levels caused by other devices on the network or by EMI?

A)brownout
B)blackout
C)noise
D)surge

Question 15

One watt is equal to how many volt-amps?

A)1.4
B)2
C)10
D)1,000

Question 16

What steps should be taken to manage documentation at a cabling plant?

Question 17

Explain the difference between an inverter and a rectifier.

Question 18

The TIA/EIA standard for wall jacks in a work area require that at least one outlet be provided for data and one for voice.

Question 19

How far away from fluorescent lights or other sources of EMI should cable be installed?

A)at least 3 feet
B)at least 5 feet
C)at least 10 feet
D)at least 20 feet

Question 20

What is the maximum allowable distance for horizontal wiring?

A)100 ft
B)100 m
C)90 m
D)90 ft

Question 21

What component of the backbone runs between a building's floors and can be used to connect an MDF and IDF or multiple IDFs?

A)horizontal cross connect
B)patch cable
C)vertical cross connect
D)diagonal cabling

Question 22

Select the component of enterprise level structured cabling that serves as the location where an incoming network interface enters a building and connects with the building's backbone cabling:

A)network interface device
B)main distribution frame
C)intermediate distribution frame
D)entrance facility

Question 23

The room where the _________________ is located is called the data closet.

Question 24

The standard that describes uniform,enterprise-wide cabling systems,regardless of who manufactures or sells the various parts used in the system,can be referred to by what two options below?

A)hierarchical cabling
B)TIA/EIA-568
C)IEEE Commercial Building Wiring Standard
D)structured cabling

Question 25

Which of the following options is not a likely source of electromagnetic interference?

A)power lines
B)motors
C)fiber optic cables
D)microwaves

Question 26

When selecting a punch down block,what block type is more suitable for data connections?

A)10 block
B)22 block
C)66 block
D)110 block

Question 27

Select the two terms below that are used to describe a UPS that provides continuous voltage to a device by switching virtually instantaneously to the battery when it detects a loss of power:

A)offline UPS
B)standby UPS
C)standby power supply
D)failover power supply

Question 28

During termination of twisted pair cabling,what should be done to ensure minimal cross talk is introduced?

A)No more than 1 inch of the cable should be exposed.
B)No less than 1 inch of the cable should be exposed.
C)Each pair should be stripped of insulation so that it doesn't get caught in the jack.
D)Each pair should be twisted around another pair to reduce cross talk.

Question 29

To ensure that any _____________ are detected,frames are made large enough to fill the entire cable during transmission.

Question 30

Select the two Transport Layer protocols that are used by SANs:

A)Fibre Channel
B)iSCSI
C)SAS
D)SATA

Question 31

_______ are highly scalable and have a very high fault tolerance,massive storage capabilities,and fast data access.

Question 32

In order to simplify console access to computers in a rack,what device is typically used to provide a central portal for all devices on the rack?

A)KVM switch
B)AVR switch
C)terminal server
D)multi-monitor breakout cable

Question 33

Select the maximum allowable distances for horizontal wiring for a span that connects a data jack on a wall to a data closet,and for a span that connects a workstation to the data jack,respectively:

A)100 m
B)90 m
C)10 m
D)5 m

Question 34

Equipment racks most commonly come in what two widths?

A)17 inch frame
B)18 inch frame
C)19 inch frame
D)23 inch frame

Question 35

A _____________ allows for an MTU as high as 9198 bytes.

Question 36

If the use of a pre-existing Ethernet infrastructure is desired for a SAN,what Transport Layer protocol should be utilized?

A)Fibre Channel
B)iSCSI
C)SAS
D)PATA

Question 37

What cable type comes in two different modes,single mode and multimode?

A)UTP
B)STP
C)Fiber optic
D)Coaxial

Question 38

Where is a demarc located in relation to the structured cabling of an enterprise environment?

A)in the Main Distribution Frame (MDF)
B)at the Intermediate Distribution Frame (IDF)
C)at the entrance facility
D)between the MDF and the IDF

Question 39

A volt-ampere (VA)is the product of the voltage and the ________________ of the electricity on a line.

Question 40

What type of power converter changes the voltage of an AC current,such as when power over the main line from an electric company is changed before being delivered to a home?

A)inverter
B)rectifier
C)transformer
D)voltage regulator

Question 41

Matching
Match each correct item with the statement below.
a.airflow
b.alternating current (AC)
c.collision domain
d.direct current (DC)
e.FCS (frame check sequence)
f.inverter
g.NAS (Network attached storage)
h.power converter
i.rack unit (RU)
j.voltage regulator
A device that maintains a constant voltagelevel for either AC or DC electrical energy.

Question 42

Matching
Match each correct item with the statement below.
a.airflow
b.alternating current (AC)
c.collision domain
d.direct current (DC)
e.FCS (frame check sequence)
f.inverter
g.NAS (Network attached storage)
h.power converter
i.rack unit (RU)
j.voltage regulator
A device that changes the form of electrical energy in some way.Four common types are inverter,rectifier,transformer,and voltage regulator.

Question 43

Matching
Match each correct item with the statement below.
a.airflow
b.alternating current (AC)
c.collision domain
d.direct current (DC)
e.FCS (frame check sequence)
f.inverter
g.NAS (Network attached storage)
h.power converter
i.rack unit (RU)
j.voltage regulator
The flow of electrical power at a steadyrate in only one direction.

Question 44

Matching
Match each correct item with the statement below.
a.airflow
b.alternating current (AC)
c.collision domain
d.direct current (DC)
e.FCS (frame check sequence)
f.inverter
g.NAS (Network attached storage)
h.power converter
i.rack unit (RU)
j.voltage regulator
The portion of an Ethernet network inwhich collisions could occur if two nodes transmit data at thesame time.

Question 45

Matching
Match each correct item with the statement below.
a.airflow
b.alternating current (AC)
c.collision domain
d.direct current (DC)
e.FCS (frame check sequence)
f.inverter
g.NAS (Network attached storage)
h.power converter
i.rack unit (RU)
j.voltage regulator
A device that converts DC electrical energy to ACelectrical energy.Better inverters will also condition the
power,which helps protect sensitive electronic equipmentfrom power fluctuations.

Question 46

Matching
Match each correct item with the statement below.
a.airflow
b.alternating current (AC)
c.collision domain
d.direct current (DC)
e.FCS (frame check sequence)
f.inverter
g.NAS (Network attached storage)
h.power converter
i.rack unit (RU)
j.voltage regulator
Electrical power flow on a circuitthat continually switches direction.

Question 47

Matching
Match each correct item with the statement below.
a.airflow
b.alternating current (AC)
c.collision domain
d.direct current (DC)
e.FCS (frame check sequence)
f.inverter
g.NAS (Network attached storage)
h.power converter
i.rack unit (RU)
j.voltage regulator
In a chassis,the path along which air from a cool airsource is conducted,past equipment to cool it,and then outof the rack.Typically,air moves from front to back.

Question 48

Matching
Match each correct item with the statement below.
a.airflow
b.alternating current (AC)
c.collision domain
d.direct current (DC)
e.FCS (frame check sequence)
f.inverter
g.NAS (Network attached storage)
h.power converter
i.rack unit (RU)
j.voltage regulator
The industry-standard unit for measuring rackheight.Standard racks are 42U tall-about 6 feet.

Question 49

Matching
Match each correct item with the statement below.
a.airflow
b.alternating current (AC)
c.collision domain
d.direct current (DC)
e.FCS (frame check sequence)
f.inverter
g.NAS (Network attached storage)
h.power converter
i.rack unit (RU)
j.voltage regulator
A specialized storagedevice or group of storage devices that provides centralizedfault-tolerant data storage for a network.

Question 50

Matching
Match each correct item with the statement below.
a.airflow
b.alternating current (AC)
c.collision domain
d.direct current (DC)
e.FCS (frame check sequence)
f.inverter
g.NAS (Network attached storage)
h.power converter
i.rack unit (RU)
j.voltage regulator
The field in a frame responsiblefor ensuring that data carried by the frame arrives intact.Ituses an algorithm,such as CRC,to accomplish thisverification.