Chapter 4

Question 1

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

Answer 1

C) noise

Question 2

One watt is equal to how many volt-amps?
A) 1.4
B) 2
C) 10
D) 1,000

Answer 2

A) 1.4

Question 3

What is the maximum allowable distance for horizontal wiring?
A) 100 ft
B) 100 m
C) 90 m
D) 90 ft

Answer 3

B) 100 m

Question 4

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 4

C) bend radius

Question 5

How far away from fluorescent lights or other sources of EMI should cable be installed?
A) at least 3 ft
B) at least 5 ft
C) at least 10 ft
D) at least 20 ft

Answer 5

A) at least 3 ft

Question 6

What is the industry standard for rack height in rack units?
A) 18U
B) 22U
C) 42U
D) 54U

Answer 6

C) 42U

Question 7

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

Answer 7

C) full-duplex

Question 8

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

Answer 8

B) half duplex

Question 9

Ethernet exists at what layer of the OSI model?
A) Layer 1
B) Layer 2
C) Layer 3
D) Layer 4

Answer 9

B) Layer 2

Question 10

What is the maximum frame size for Ethernet ll frames on a VLAN?
A) 1500 bytes
B) 1518 bytes
C) 1522 bytes
D) 1496 bytes

Answer 10

C) 1522 bytes

Question 11

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

Answer 11

D) 110 block

Question 12

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

Answer 12

C) vertical cross connect

Question 13

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) in the work area
D) between the MDF and the IDF

Answer 13

A) in the Main Distribution Frame (MDF)

Question 14

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

Answer 14

D) entrance facility

Question 15

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

Answer 15

A) No more than 1 inch of the cable should be exposed

Question 16

What cable type comes in two different modes, single mode and multimode?
A) UTP
B) STP
C) Fiber Optic
D) Coaxial

Answer 16

C) Fiber Optic

Question 17

Which of the following options is not a likely source of electromagnetic interference?
A) power lines
B) motors
C) fiber optic cables
D) microwaves

Answer 17

C) fiber optic cables

Question 18

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

Answer 18

A) KVM switch

Question 19

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

Answer 19

B) iSCSI

Question 20

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

Answer 20

C) transformer

Question 21

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

Answer 21

B) standby UPS

C) standby power supply

Question 22

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

Answer 22

B) TIA/EIA-568

D) structured cabling

Question 23

Equipment racks most commonly come in what two widths?
A) 17 in frame
B) 18 in frame
C) 19 in frame
D) 23 in frame

Answer 23

C) 19 in frame

D) 23 in frame

Question 24

Select the two Transport Layer protocol that are used by SANs: 
A) Fibre Channel
B) iSCSI
C) SAS
D) SATA

Answer 24

A) Fibre Channel

B) iSCSI

Question 25

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

Answer 25

B) 90 m

C) 10 m