Ch 5

What kind of tool can measure the distance to the location of damage in a cable?

Cable performance tester

Why is SMF more efficient over long distances than MMF?

The core of SMF is much narrower than that of MMF, and reflects very little. The light does not disperse as much along the fiber.

Why do APC ferrules create less back reflection than UPC ferrules?

The end faces are placed at an angle to each other, so the reflection is sent back in a different direction than the source of the signal.

On the Throughput chart, what was the highest reading obtained and what kind of traffic was it? a. 32.17 and TCP Down b. 32.17 and TCP Up c. 32.17 and UDP Down d. 32.17 and UDP Up

a. 32.17 and TCP Down

What statement describes a transmission flaw that is occurring due to attenuation? a. A customer modem is continuously losing signal due to large distance from the transmitting device b. A network switch interface is dropping due to a powerful radio transmitter in the adjacent room c. A customer's video conferencing application is experiencing delay in audio and video that comes and goes d. Two network interfaces are experiencing problems at the same time due to cables having adjacent runs

a. A customer modem is continuously losing signal due to large distance from the transmitting device

If you need to perform port scanning in your network, which of the following tool are you likely to use? [Choose all that apply]. a. Angry IP Scanner b. Superscan c. Cain and Abel d. Wireshark e. tcpdump

a. Angry IP Scanner b. Superscan

What is the earliest twisted-pair cabling standard that meets the minimum requirements for 10GBase-T transmissions? a. Cat 6a b. Cat 5 c. Cat 5e d. Cat 7

a. Cat 6a

When you traced the route to the Scott Base research website, which choice was NOT a possible reason for your packets to be dropped? a. IP configuration b. Firewall c. ICMP packets automatically dropped d. All of these are correct

a. IP configuration

What statement correctly describes "jitter"? a. Jitter is what happens when packets experience varying amounts of delay and arrive out of order b. Jitter is the loss of 50% or more packets in a given data stream, causing a connection to falter c. Jitter is the fluctuation of a signal's strength as it travels away from its source d. Jitter is the transmission of signal onto unintended pairs in a copper cable

a. Jitter is what happens when packets experience varying amounts of delay and arrive out of order

Broadband cable Internet service and cable TV are most commonly delivered over long distances via what type of cable? a. RG-6 b. RG-59 c. LRG-50 d. RG-20

a. RG-6

When you traced the route to Oxford University, What was the IP address of the first London router that responded? a. 229.67.242.155 b. 62.115.135.95 c. 62.115.134.155 d. 129.67.242.155

b. 62.115.135.95

What throughput rating was displayed for your connection the LAN Speed Test? a. Normal b. Average c. Maximum d. Minimum

b. Average

Which of these categories of twisted-pair cable can support Gigabit Ethernet? a. Cat 5, Cat 6, Cat 7 b. Cat 5e, Cat 6a, Cat 7 c. Cat 5e, Cat 6, Cat 3 d. Cat 6, Cat 7a, Cat 5

b. Cat 5e, Cat 6a, Cat 7

When you traced the route to Oxford University, what was the longest delay on milliseconds? In the space provided, enter only the numeric value.

220

When reviewing the chart outputs from the Throughput Test, which traffic type had the most loss? a. TCP Downstream b. TCP Upstream c. UDP Downstream d. UDP Upstream

d. UDP Upstream

What was the upload speed result in Mbps for the LAN Speed Test? In the space provided, enter only the numeric value.

85.86

Suppose you're assisting with a cable installation using fiber-optic cabling that will support Gigabit Ethernet. You're approved to install segments up to 4000 m in length. What kind of cable are you using?

A single mode fiber cable

When you traced the route to the University of Lisbon in Portugal, which internet protocol was used? In the space provided, enter only the numeric value.

IPv6

What fiber is used in fiber-optic cabling to protect the inner core and prevent the cable from stretching?

Kevlar, a polymeric fiber

What is the difference between short circuits and open circuits?

Short circuit is an unwanted connection, i.e. Exposed wires touching. Open circuit is one where needed connections are missing, i.e. Wire breaks

Which fiber transceiver is the same size as SFP transceivers, but can support network speeds over 10 Gbps?

SFP+

What was the download speed result in Mbps for the LAN Speed Test? In the space provided, enter only the numeric value.

118.66

How is latency measured, and in what unit?

By calculating a packet's RTT, or the length of time it takes for a packet to go from sender to receiver, then back from receiver to sender. RTT is usually measured in milliseconds.

What characteristic of optical transmissions is primarily responsible for the distance limitations of fiber-optic cabling?

Optical loss, which is the degradation of the light signal after it travels a certain distance away from its source

What is a twist ratio, and why is it important?

Twist ratio is the number of twists per meter or foot. The more twists per foot in a pair of wires, the more resistant the pair will be to cross-talk or noise.

Why would a network administrator implement vulnerability scanning on a network? a. To return a network device to its previous settings b. To reveal vulnerabilities in the network c. To examine network device event logs d. To identify open ports on a server

b. To reveal vulnerabilities in the network

Suppose you're creating patch cables to be used in a government office. What color wire goes in the first pin? a. Blue b. White/green c. White/orange d. Brown

b. White/green

What is the fastest Ethernet standard that can possibly be used on twisted-pair cabling? a. 100Base-T b. 1000Base-T c. 10GBase-T d. 10TBase-T

c. 10GBase-T

Which transmission characteristic is never fully achieved? a. Bit rate b. Latency c. Bandwidth d. Throughput

c. Bandwidth

What is the minimum category of UTP cable required in order to support Gigabit speeds? a. Cat 3 b. Cat 5 c. Cat 5e d. Cat 6

c. Cat 5e

What kind of cable uses BNC connectors? Which connector is likely to be used by cable TV? a. Twisted-pair cable, RJ-11 b. Copper cable, RJ-45 c. Coaxial cable, F-connector d. Fiber-optic cable, MTRJ

c. Coaxial cable, F-connector

What type of fiber cable problem is caused when pairing a 50-micron core cable with a 62.5-micron core cable? a. Wavelength mismatch b. Tx/Rx reverse c. Fiber type mismatch d. Dirty connectors

c. Fiber type mismatch

Which fiber connector contains two strands of fiber in each ferrule? a. SC b. LC c. MTRJ d. ST

c. MTRJ

Which kind of crosstalk occurs between wire pairs near the source of the signal? a. Tx/Rx reverse b. FEXT c. NEXT d. Alien

c. NEXT

Utilizing time slots that are adjusted according to priority and need is an example of what type of multiplexing on copper lines? a. Frequency division multiplexing b. Wavelength division multiplexing c. Statistical time division multiplexing d. Time division multiplexing

c. Statistical time division multiplexing

A typical fiber termination kit should include what tool for cutting a clean slice through fiber strands? a. fiber stripper b. fiber snipper c. fiber cleaver d. fiber saw

c. fiber cleaver

To troubleshoot a network problem, you are required to use a packet analyzer on a Unix based system. Which of the following command line interface commands will provide you with the required functionality? a. ifconfig b. netstat c. tcpdump d. nslookup e. tcproute

c. tcpdump

What is the maximum supported throughput of a CAT6 cable? a. 1 Gbps b. 100 Gbps c. 100 Mbps d. 10 Gbps

d. 10 Gbps

You are asked to perform an analysis on the network that will allow you to deduce information from patterns in communication. Which of the following types of analysis are you asked to perform? a. Device log review b. Compare network performance to baselines c. Identify network vulnerabilities d. Data traffic analysis

d. Data traffic analysis

Which of the following statements correctly describes the SFP+ transceiver? a. SFP+ support up to 10 Gbps and is slightly larger than SFP, with lower power consumption than XFP b. SFP+ complies with the 802.3ba standard, allowing four channels in a single transceiver and supporting up to 40 Gbps data rates c. SFP+ provides the same function as GBICs and is more compact. It is theoretically capable of 5 Gbps d. SFP+ is the same size as SFP, and supports a theoretical maximum transmission speed of 16 Gbps

d. SFP+ is the same size as SFP, and supports a theoretical maximum transmission speed of 16 Gbps

Which kind of multiplexing assigns slots to nodes according to priority and need? a. TDM (time division multiplexing) b. WDM (wavelength division multiplexing) c. CWDM (coarse wavelength division multiplexing) d. STDM (statistical time division multiplexing)

d. STDM (statistical time division multiplexing)

You have installed Ubuntu as a server-based operating system for your enterprise. Where can you find apps for your Ubuntu install? a. App Central c. Windows Store c. App Store d. Software Store

d. Software Store

What's the closest router location to Scott Base's web server that your trace reached? a. Alaska b. New York c. Los Angeles d. The Netherlands

d. The Netherlands

Which part of a toner and probe kit emits an audible tone when it detects electrical activity on a wire pair? a. Toner b. Tone generator c. TDR d. Tone locator

d. Tone locator

You have been experiencing connectivity with various websites. The response time to open these websites is high. You tested the same websites from your home and could open them much faster. You assume that the slow access to the Websites might be due to high latency. Which of the given utility is likely to help you in finding the source that may be causing the latency issue? a. Nslookup b. Ping c. Netstat d. Traceroute

d. Traceroute