1 Which of the following describe the ray model of light? (Choose three.)

*Light bends at the boundary of two transparent materials.
The speed of light is greatest when passing through optical glass.
The speed of light is constant no matter what material passes through.
*The optical density of the material determines how much the light will bend.
*The index of refraction is the ratio of the speed of light in a material compared to a vacuum.




2 Which two are necessary to achieve total internal reflection within a fiber-optic cable? (Choose two.)

The entire incident light ray must be refracted into the cladding.
The index of refraction of the core must be less than that of the cladding.
*The index of refraction of the core must be greater than that of the cladding.
The optical density of the reflecting material must be higher than the refracting index.
*The angle of incidence of the light ray must be greater than the critical angle for the core and cladding.




3 Which of the following are attributes of singlemode fiber optic cable? (Choose two.)

*one path of light
larger fiber optic core
uses LEDs as a light source
distances up to 5000 meters
*higher bandwidth than multimode




4 Which of the following are characteristics of fiber optic light receivers? (Choose two.)

react to multiple wavelengths
*react to a specific wavelength
tuned to one wavelength for noise reduction
*use PIN photodiodes to convert light pulses to electrical signals




5 Which factors can lead to a loss of signal strength in fiber optic cable? (Select three.)

*absorption
RFI
crosstalk
*scattering
*dispersion
EMI




6 Which tasks must be performed when installing fiber optic cable? (Choose three.)

*install connectors
inspect laser signal using a microscope
*cleave and polish cable ends
wash cable ends with mild soap and water
*protect connector ends from dirt and damage
pull cables tight to reduce the number of bends and twists




7 Which devices could cause problems with a wireless transmission? (Choose two.)

radio
TV
*microwave
*wireless phone
DVD remote control




8 Which of the following radio carrier signal modulation types will modulate the height (amplitude) of the carrier signal?

*AM
FM
PM
RF




9 Which of the following identifies a node that has been authenticated but not yet associated with the access point?

unauthenticated and unassociated
unauthenticated and associated
*authenticated and unassociated
authenticated and associated




10 Your company has a new wireless network setup in their building. The boss has heard the throughput for a wireless network would be 11 Mbps. You mention that because of the way WLANs transmit and acknowledge data the actual percentage of throughput would be which of the following?

25%
40%
*50%
70%




11 What is the minimum number of devices that can exist in a wireless network?

1
*2
3
4




12 Which of the following wireless standards increased transmission capabilities to 11 Mbps?

802.11a
*802.11b
802.11c
802.11d




13 Which term refers to the amount of signal power loss that can be tolerated on a fiber optic link?

linear laser light loss
*optical link loss budget
acceptable decibel power reduction
maximum allowable light attenuation




14 How is full-duplex capability achieved in fiber optic cable?

*Two fibers are encased in separate sheaths.
Light is bounced at different rates in opposite directions.
Transmit speeds are so high that half-duplex is acceptable.
Colors of the light spectrum are separated into transmit and receive streams.




15 Which of the following is a difference between multi-mode and single-mode FDDI media?

Multi-mode is recommended for use between buildings.
Multi-mode can be run longer distances than single-mode.
Multi-mode is capable of higher bandwidths than single-mode.
*Multi-mode uses LEDs as the light-generating devices while single-mode uses lasers.

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1 Which of the following is another name for the binary number system?

* Base 2
Base 5
Base 10
Base 16




2

What type of wiring problem is depicted in this sample of a cable tester?

a fault
a short
* an open
a split
a good map




3 Which of the following are true about square waves? (Choose three.)

* They repeat the same pattern at regular intervals.
They continuously vary with time.
*They repeat the flat pattern on both the top and bottom of the wave.
*They do not continuously vary with time.
They occur naturally and change regularly over time.
They change intervals based upon voltage.




4 What conditions are described when transmission signals from one wire pair affects another wire pair? (Choose two.)

* noise
resistance mismatch
jitter
* crosstalk
attenuation




5 Which of the following units of measure are commonly used in formulas for calculating the amount of gain or loss in networking signals? (Choose three.)

* watts
ohms
* volts
* decibels
joules
amperes




6 Which of the following is another name for the decimal number system?

Base 2
Base 5
* Base 10
Base 16




7 For which type of waves would the signal gain or loss be calculated using the power formula? (Choose two.)

electromagnetic waves on copper cables
electrical waves on copper cables
* light waves on optical fiber
* radio waves in the air
sound waves in the air




8 What are some of the factors that contribute to attenuation in a copper media? (Choose three.)

type of voltage used
* long cable lengths
jitter signal sent by the transmitting device
* defective connectors
* energy leaks through the insulation of the cable
low signal frequencies




9 Which of the following are possible sources of line noise? (Choose three.)

* radio transmitters
* electrical motors
* crosstalk
laser light
incandescent light




10 Why would fiber optic installations be favored over copper between buildings? (Choose two.)

cheaper installation
larger media
* attentuation properties
* no electrical interference
easier termination and installation




11 What problems are associated with impedance mismatches in copper cabling? (Choose two.)

* jitter
signal absorption
termination of signals
* reflection
NEXT




12 Which of the following describe sine waves? (Choose three.)

They do not continuously vary with time.
* They repeat the same pattern at regular intervals.
* They occur naturally and change regularly over time.
They are artificially created and do not occur naturally.
* No two adjacent points on a graph have the same value.
They have continuously varying patterns that do not repeat.




13 Which of the following are tests specified by the TIA/EIA-568-B standard for copper cable? (Choose three.)

signal harmonics
conductive response
* wire map
signal absorption
insertion loss
propagation delay




14 During cable testing, which of the following are used to calculate the information carrying capacity of a data cable? (Choose two.)

bit speed
attenuation
wire map
* saturation limit
* analog bandwidth
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1 A network administrator, while analyzing the network, notices a large number of "runts". What is significant about this? (Choose two.)

A server with high network priority is receiving significant use, overriding normal packet delivery.
* A significant number of collisions are occurring, leaving collision fragments.
Corrupt data has been split into small packets allowing the network to function more smoothly.
The network is operating smoothly allowing data to be sent in smaller increments.
* Throughput on the network is significantly reduced due to excessive collisions.




2 Which statements correctly describe slot time? (Choose two.)

* the time period just longer than the longest possible round trip when all options are at their maximum
the time required to send an entire frame through the outgoing port
the minimum spacing between two non-colliding frames
* undefined on 10 Gigabit Ethernet




3 Which options below are field names of a generic frame? (Choose three.)

IP header
voltage reference
* data
description
* length
* frame check sequence




4 Which of the following is included in the frame address field? (Choose two.)

source IP address
destination IP address
destination subnet mask
* source MAC address
* destination MAC address




5 Ethernet standard specifications limit network service interruption. Select the items that describe the standards. (Choose three.)

minimum segment length
* maximum segment length
minimum number of stations per segment
* maximum number of stations per segment
minimum number of repeaters between segments
* maximum number of repeaters between segments




6 How are collisions detected on an Ethernet network?

Stations identify the altered FCS field on the colliding packets.
* The signal amplitude on the networking media increases.
There is blockage on the network causing no traffic to be detected.
The signal amplitude on the networking media decreases.




7 Which of the following are sublayers of the OSI data link layer? (Choose two.)

* Logical Link Control
Logical Layer Control
* Media Access Control
Logical Link Communication
Media Access Communication
Physical Access Communication




8 What is indicated when the length/type frame field value is greater than 0x600?

DIX formatted frame header
* Ethernet II code used to interpret the frame
length of frame is 600 bits
half duplex transmission being utilized




9 Which features describe the Token Ring topology? (Choose two.)

* collisionless environment.
non-deterministic.
* deterministic
uses CSMA/CD
prone to collisions




10 What are the possible reasons the MAC layer would be unable to send a frame in sixteen attempts? (Choose two.)

The destination is more than 16 hops away and unreachable.
* A physical problem exists on the network.
The destination never received a token and therefore could not return verification of the CRC.
The network administrator assigned the wrong MAC address to the device.
* The network is experiencing extremely heavy traffic loads.
The physical layer has not yet reached a state of convergence.




11 Which characteristics of Ethernet contribute to its widespread use? (Choose three.)

* ease of maintenance
collision free technology
* scalability
* low cost of installation
compatibility with 802.5 standard
collision avoidance capabilities




12 Select the statements that correctly describe the Length and Type Ethernet frame fields. (Choose three.)

Both fields, Length and Type, exist in all versions of Ethernet frames.
* DIX versions of Ethernet use the field Type.
Early IEEE Ethernet versions used a combined Length/Type field.
* Early IEEE Ethernet versions used the field Length.
* Later IEEE Ethernet versions use a combined Length/Type field.
Later IEEE Ethernet versions use separate Length and Type fields.




13 What does the word "Base" indicate in 10Base2?

The number standard used.
* Baseband signaling is used.
Only a portion of the transmission medium is used.
Broadband signaling is used.




14 Which of the following would indicate the beginning of the frame?

flag bit
* start of frame
frame check sequence
address field




15 Which statements below are true about Ethernet? (Choose three.)

addresses the needs of Layer 2 and Layer 3 of the OSI model
first released as a Xerox proprietary standard
* essentially the same as 802.3 standards
* bandwidth can be increased without changing the underlying technology
essentially the same as 802.2 standards
* original idea developed at the University of Hawaii



16 What does the "10" in 10Base2 indicate about this version of Ethernet?

The version uses Base10 numbering within the frames.
* The version operates at a transmission rate of 10 Mbps.
Frames can travel 10 meters unrepeated.
The maximum frame length is 10 octets.




17 What happens on an Ethernet network after a collision occurs? (Choose three.)

* A backoff algorithm is invoked and transmission is stopped.
Devices involved in the collision have a random period of time for priority retransmission of the damaged packet.
The devices involved in the collision release a token indicating the time each station may begin retransmitting.
* The devices involved in the collision do not have priority to transmit data.
* The devices with data to transmit return to a listen-before-transmit mode.
Transmit work will restart with the reissuance of all data.




18 Which of the following are the functions of CSMA/CD? (Choose three.)

* transmitting and receiving data packets
releasing a token when the network is clear
* detecting errors within data packets or on the network
passing a token to each station on the network
* decoding data packets and checking them for valid addresses before passing them to the upper layers of the OSI model
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1 Which of the following has limited the bandwidth of fiber based Ethernet? (Choose three.)

* emitter technology
absolute fiber light-carrying capacities
theoretical limits of fiber capacity
* fiber manufacturing processes
* detector technology
angles and curves in the fiber run




2 Which type of device could be used to interconnect a 1000BASE-T network to a 100BASE-T network? (Choose two.)

multi-port hub
speed adapting repeater
* Layer 2 bridge
repeating NIC
multi-port Layer 3 bridge
* switch




3 Which of the following are common to all versions of Gigabit Ethernet? (Choose three.)

packet size
* frame format
medium
* timing
* transmission
wavelength




4 100BASE-TX operates in which transmission modes? (Choose two.)

reverse simplex
* full-duplex
* half-duplex
full-biplex
single phase biplex




5 Which of the following are Fast Ethernet technologies? (Choose two.)

100BASE-5
100BASE2
1000BASE-F
* 100BASE-FX
* 100BASE-TX




6 Which media types can be used in an implementation of a 10BASE-T network? (Choose three.)

* Category 5 UTP
* Category 5e UTP
* Category 3 UTP
coaxial cable
multi-mode fiber
single mode fiber




7 Why would an organization choose to implement twisted pair cabling over coaxial cabling? (Choose two.)

* cheaper
* easier to install
proprietary
used in most older networks
easy to make wiring errors
no limitations to the length of each segment




8 For a network manager planning the installation of a new network, which of the following will be needed to implement a typical 10BASE-T network installation? (Choose three.)

RJ-11
BNC connectors
RJ-48 patch cables
* RJ-45 connectors
* Category 5 UTP cables
* hubs or switches




9 Which of the following are true when comparing 10BASE2 and 10BASE5? (Choose three.)

10BASE2 supports faster data rates than 10BASE5.
10BASE2 has longer allowable cable lengths.
* 10BASE2 cable is more flexible than 10BASE5 cable.
* 10BASE5 cable is heavier than 10BASE2 cable.
* 10BASE5 and 10BASE2 networks operate in half-duplex mode.
10BASE5 and 10BASE2 networks have central hubs to control traffic networks.




10 Which of the following were considered advantages of 10BASE5 networks? (Choose two.)

easy to install
easy to find hardware
* inexpensive
* no configuration




11 Which of the following Ethernet technologies are considered legacy Ethernet? (Choose three.)

* 10BASE2
* 10BASE5
* 10BASE-T
100BASE-T
100BASE-FX
100BASE-TX




12 Which of the following Ethernet technologies share the same timing parameters? (Choose three.)

* 10BASE2
* 10BASE5
* 10BASE-T
100BASE-TX
100BASE-FX
100BASE-RX




13 Which of the following common networking problems is eliminated when an Ethernet network uses separate transmit and receive wire pairs and a switched topology?

* collisions on the physical bus
single segment distance limitations
the maximum bandwidth available on CAT 3 wiring
Multi-port bridge replication errors
CSCD/MA maximum repeater rules