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Network Plus > Certmaster(Module 2) > Flashcards

Certmaster(Module 2) Flashcards

1
Q

A network installer is building a long-distance link. The nodes are approximately 5 km apart.

What type of fiber link should the installer build for this link?v

A

1000BASE-LX

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2
Q

A cable installer uses snips to cut the cable and strip the insulation to install connectors.

What single tool can the installer use to do this when working with multiple types of cable?

A

Cable stripper

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3
Q

Which of the following 802.11 standards will provide the fastest wireless network throughput and work in the 5 GHz band only?

A

802.11ac

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4
Q

The T11 ANSI standard can be a particularly expensive way to connect a Storage Area Network (SAN) and involves three main types of components: the initiator, the target, and a director.

What is the name of the standard described?

A

Fibre Channel

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5
Q

A tech replaces a failed wireless router at a company. While waiting for the new router to arrive, an older router is put in place and will only provide speeds of 54 Mbps.

Which wireless standard does the older router use?

A

g

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6
Q

An engineer has installed a new router but is not connected to the core network yet.

What type of connector should the engineer install to get the requested throughput of 30Gbps or more?

A

Enhanced quad small form-factor pluggable (QSFP+)

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7
Q

An engineer is installing a new connection between two database stacks. The engineer is using copper cable and needs a connection speed of 40GbE with a distance of about 12 feet.

Which medium should the engineer utilize for this link?

A

Twinaxial

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8
Q

An organization has asked a junior network technician to retrieve some swappable ports that host a single LC connection per port.

Since there are numerous inserts for network devices, which should the technician retrieve?

A

SFP

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9
Q

An IT engineer considers optical mode OM1 or OM2 cables for a project. The project requires cables that are rated for applications up to 1 Gbps and use LED transmitters.

Of the following choices, which type of cable does the engineer select to use?

A

Multimode

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10
Q

Users at a company use a mix of wireless devices (phones, tablets, laptops) that use either the 2.4 or 5 GHz spectrum.

Considering the given wireless 802.11 standard, which one does the company utilize for their mobile devices?

A

n

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11
Q

Network equipment in a rack system has limited in-front-facing space with the door closed. A technician uses small form-factor connectors to connect a fiber cable.

Which of the following connector types is the technician using?

A

LC

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12
Q

An installer is laying cable in the ceiling alongside the building’s ventilation system.

What type of cable must the installer use?

A

Plenum cable

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13
Q

An IT engineer chooses to use a fiber cable implementation that uses light-emitting diode (LED) technology rather than one that uses lasers.

Considering the optic technology in use, what is the engineer implementing?

A

Multimode

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14
Q

A technician is building a new network link between a switch and a router. The switch only has ethernet ports, while the router only has fiber ports.

What could the technician utilize to connect these two devices?

A

Transceiver/media converter

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15
Q

An IT engineer digs through a closet to find a Wi-Fi router to use while waiting for a new one to arrive. The IT engineer chooses between several routers and selects one that supports both 2.4 and 5 GHz frequencies.

Which 802.11 standard does the engineer use to support both frequencies that will connect common mobile devices?

A

n

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16
Q

The same hub has Host A1 and Host B1 connected. Host A1 sends a request to communicate with Host C2. Host B1 is communicating with Host C3. There is a delay in communications between Hosts A1 and C2 until the media is clear.

Which Ethernet protocol is providing this function?

A

Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA)

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17
Q

You’re working late when you receive a report that a critical server has suddenly gone offline, impacting several key applications. Initial checks show that the server is not responding to any network requests. You recall that there was a brief power outage earlier in the day.

What should be your initial troubleshooting step?

A

Check the server’s power supply and UPS status

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18
Q

An installer is cabling a new building and is laying cable in every area of the building that may need a computer or telephone.

What kind of cable is the installer installing?

A

UTP (unshielded twisted pair)

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19
Q

What is used to connect a port on a patch panel to another network port, typically a switch port housed in the same rack?

A

RJ-45 patch cord

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20
Q

Which of the following would a technician find in a network map?

MDF/IDFs

System logs

Firewall rules

QoS standards

A

MDF/IDFs

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21
Q

A network operations engineer is investigating alerts that the data center keeps switching to battery backup.

What environmental factor should the engineer investigate?

A

Electrical

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22
Q

In a distributed network architecture, what is the term for the smaller network enclosures that link remote segments to the main network hub?

A

IDF

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23
Q

What functionalities do remote power monitoring features in advanced Power Distribution Units (PDUs) typically offer? (Select two.)

Real-time power consumption monitoring

Remote firmware updates for connected devices

Remote control of power to individual outlets

Direct internet access for connected devices

A

Real-time power consumption monitoring
Remote control of power to individual outlets

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24
Q

An Information Technology department is looking to improve the safety and reliability of their server closet. They already upgraded the cooling and power components but need to install a Class C extinguishing system.

What kind of facilities support component should the department invest in?

A

Fire suppression

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25
Q

A solutions architect is designing a cable management solution.

Which of the following is the most common wiring distribution?

A

Patch panel

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26
Q

What is the benefit of using lockable brackets and drawers within a rack?

A

To protect individual elements within a rack

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27
Q

How is rack height measured?

A

In “U” units

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28
Q

A sysadmin recently completed an upgrade to the data center. Shortly after, the electric company cut a power line to the building, but the data center continued to operate until they repaired the power line.

Which of the following solutions did the sysadmin MOST likely set up to prevent downtime?

A

UPS

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29
Q

What is the primary reason for installing lockable doors on server racks?

A

To prevent unauthorized access to the equipment

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30
Q

The sysadmin is receiving alerts that the servers are having issues. A Heat/Ventilation/Air Conditioning system failed in the server room.

What alerts did the sysadmin receive regarding the servers?

A

Temperature

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31
Q

Why do equipment room and data center facilities tend to use high voltage circuits?

A

To allow for a higher load capacity with lower amperage

32
Q

What is the primary purpose of using fiber distribution panels in a fiber optic network?

A

To provide a centralized location for connecting and managing fiber optic cables.

33
Q

An administrator is using existing cabling to supply power to PoE switches. When an administrator plugs a device into the switch port, the PoE switch will determine the device’s power consumption and set the supply voltage level appropriately.

What is the lowest standard of cabling that the PoE switches can operate on with the most efficiency? (Select two.)

Cat 5e cable or better

Unshielded cabling

Shielded cabling

Cat 3 cable or better

A

Cat 3 cable or better

Shielded cabling

34
Q

Which solution does a network closet use to clean a power signal?

A

PDU

35
Q

A wiring expert runs new Ethernet cabling in an office. The chosen cable type allows for distances of 100 meters (328 feet) with speeds of 10 Gbps, fully screened and shielded.

Based on the characteristics of the standard Ethernet cable categories, which type of cable is the wiring expert installing?

A

Cat 7 cable is fully screened and shielded (S/FTP) and rated for 10GbE applications up to 100 m (328 feet). The cable supports transmission frequencies up to 600 MHz at 10 Gbps.

36
Q

Although fiber optic cable does not suffer from attenuation in the same way as copper cable, there will still be some loss of signal strength from one end of the connection to the other.

Which of the following can contribute to signal loss in fiber? (Select three.)

Mismatched coupled cables

Electromagnetic interference

Incorrect transceivers

Dirty optical cables

A

Mismatched coupled cables

Incorrect transceivers

Dirty optical cables

37
Q

A sysadmin is running into an issue that traffic is getting dropped by the network equipment. After researching the issue, the sysadmin finds that the individual packets are too large.

What should the sysadmin remove to resolve the issue?

A

Giants

38
Q

Which of the following is true about the impact of drawing power down a PoE cable?

A

It generates more heat which can affect data rates.

39
Q

An administrator is using a cable tester to ensure that a cable meets the proper performance characteristics for interference. However, when the administrator connects the cable from a host to the switch, the host cannot communicate on the network.

Why might be causing this issue?

A

Crossed pair cable

40
Q

While working on connectivity issues, a network consultant attempts to determine the amount of loss suffered by the components on the fiber transmission path.

What is this called?

A

Low optical link budget

41
Q

A desktop engineer is responding to a support request stating that a brand-new machine with 16GB of memory and an m.2 SSD is still running too slow.

What component did an administrator poorly choose when ordering the device?

A

The Central Processing Unit (CPU) refers to the component in a device that executes commands given to it by a program or operating system. CPUs plug into a socket on a motherboard. Improving the processing speed would help programs calculate faster.

42
Q

Computers connected to a network in a new building are experiencing slow network speeds. An administrator is troubleshooting the issue and sees that the new building uses the plenum space for the ethernet cable runs.

How could this contribute to slow network speeds?

A

By causing interference

43
Q

What should be done if the power requirements of all connected devices exceed the switch’s power budget?

A

Provision another switch or use power injector devices

44
Q

Why might you budget for a signal loss through internal walls?

A

To account for potential signal degradation in indoor environments

45
Q

A network engineer is troubleshooting an ethernet connection between two buildings. The engineer notices that the network devices were upgraded, but the wiring was not.

The engineer needs a connection that can handle 10Gbps at 500 MHz for a distance of 300 feet using RJ-45 connectors.

What type of ethernet cable should the engineer replace the Cat 5 with to meet the connection standard?

A

Cat 6A is an improved specification cable that can support 10 Gbps over 100 m. RJ-45 connectors terminate the Cat 6A cable.

46
Q

What describes the calculation of a checksum based on the contents of a frame used to detect errors?

A

CRC

47
Q

A technician installs and connects some spare switches in a network closet by using crossover cables. Auto-MDI/MDIX is not supported. For some reason, the switches are not communicating with each other.

What does the technician note about the configuration while troubleshooting the issue? (Select two.)

Transmit occurs on pins 3 and 6 of the switch.

Transmit occurs on pins 1 and 2 of the switch.

The crossover cable uses T568A on one end and T568B on the other end.

The crossover cable uses T568A on both ends.

A

Transmit occurs on pins 3 and 6 of the switch.

The crossover cable uses T568A on one end and T568B on the other end.

48
Q

What are the potential causes of intermittent loss of connectivity in a cabling system? (Select two.)

Excessive untwisting at the cable ends

Crosstalk

Use of fiber optic cables instead of copper

Attenuation

A

Excessive untwisting at the cable ends

Attenuation

49
Q

What is the purpose of using matched pairs in transceiver deployment?

A

To ensure compatibility between Tx and Rx wavelengths

50
Q

An administrator connects both a router and a gateway that have dissimilar media types.

What kind of issue does this solution remedy?

A

Transceiver issue

51
Q

An administrator connected a system on one side of a large telecommunications center to a system on the opposite side of the center with a crossover cable.

However, the two systems are unable to communicate due to the distance of the cable.

What is happening to the signal on the cable?

A

Attenuation

52
Q

An engineer has a task to survey an old building and determine the current network infrastructure. Building owners state that some cabling is from a recent installation

The engineer achieves a speed of 10 Gbps while testing the cable up to 100 meters and also determines the cable to be well shielded.

Based on the engineer’s findings, the cabling meets what specification?

A

Cat 7

53
Q

A sysadmin is running into an issue that traffic is getting dropped by the network equipment. After researching the issue, the sysadmin finds that the individual packets are too small.

What should the sysadmin remove to resolve the issue?

A

Runts

54
Q

Attenuation is the loss of signal strength. Specifically, it is the ratio between the signal strength from where the signal starts to where it ends.

How is the loss of signal strength expressed?

A

Decibels

55
Q

A network engineer is troubleshooting an ethernet connection between two buildings. The engineer notices that the network devices were upgraded, but the wiring was not.

The engineer needs a connection that can handle 10Gbps at 500 MHz for a distance of 300 feet using RJ-45 connectors.

What type of ethernet cable should the engineer replace the Cat 5 with to meet the connection standard?

A

Cat 6A

56
Q

Following a cybersecurity incident, IT security analysts discover that unauthorized access was gained through unused protocols enabled on a network device.

Which of the following tools should the analysts employ to identify the exploited vulnerabilities?

A

netstat

57
Q

Which of the following commands displays the general NetFlow data on the command line?

A

The show ip cache flow command displays the NetFlow accounting statistics. This would show a visualization of general NetFlow data.

58
Q

An administrator measures the resistance between the two ends of a cable and verifies that the cable has a break.

What tool allows the administrator to test the cable end resistance?

A

Multimeter

59
Q

Which of the following is a command-line packet capturing utility?

A

Tcpdump is a packet analyzer that is launched from the command line. It can analyze network traffic by intercepting and displaying packets created or received by the computer it is running on.

60
Q

An organization needs to monitor the network with a packet sniffer. The network is using gigabit ethernet over copper wire so the frames will also need signal regeneration.

What device can the organization use to accomplish both the network monitoring and signal regeneration?

A

TAP

61
Q

A small section of the office is complaining about poor Wi-Fi signal.

Which of the following tools have the capability to pinpoint the origin of the interference?

A

Spectrum analyzer

62
Q

An administrator is using a wire map tester to identify different types of issues with cabling.

What kinds of issues can the wire map tester detect? (Select all that apply.)

Short

Bad port

Incorrect pin-out

Continuity

A

Short

Incorrect pin-out

Continuity

63
Q

A systems administrator is unable to ping remote hosts from a Debian server. However, remote hosts can ping the server. The administrator troubleshoots the issue by examining the OUTPUT chain.

Which of the following tools meets the administrator’s needs to troubleshoot the issue?

A

The iptables command line utility is used to edit the rules enforced by the Linux kernel firewall. It can change INPUT, OUTPUT and FORWARD chains that are firewall rulesets.

64
Q

To determine why the network is running slowly, an administrator wants detailed properties for the cable run, including how much attenuation, crosstalk, noise, and resistance are on it.

What tool should the administrator use to gather all of this information?

A

The administrator should use a cable tester that reports detailed information on the cable’s physical and electrical properties, including crosstalk, attenuation, noise, and resistance.

65
Q

A user informs IT support that a company server is unreachable when using its host name. A technician fixes the issue by reconfiguring the host name in a Domain Name System (DNS) server and clearing the DNS cache on the user’s Windows computer.

Which of the following commands did the technician use to resolve the issue?

A

ipconfig

66
Q

A cable installer is testing fiber optic cable for spectral attenuation with the goal of ensuring that each channel has enough power to support wavelength division multiplexing.

What tool is the cable installer using?

A

An administrator would use an optical spectrum analyzer (OSA) with fiber optic cabling, usually with wavelength division multiplexing (WDM), to ensure that each channel has sufficient power.

67
Q

What is a network command-line utility in MS Windows that tracks and displays the route taken by IPv4 packets on their way to another host known as?

A

tracert

68
Q

Which of the software tools allows you to obtain a domain name to IP address mapping?

A

nslookup

69
Q

An IT specialist deploys a Wi-Fi analyzer application on a tablet to assess the performance of a newly implemented wireless network in a large conference room.

Which of the following does the Wi-Fi analyzer deliver that is crucial for determining the effectiveness of the network layout?

A

Signal strength

70
Q

An organization hires a network technician who discovers that none of the previous technicians had labeled the cabling in the organization’s headquarters building.

What tool can the technician use to locate the ends of each cable for labeling?

A

Network tone generator

71
Q

What is a command-line utility used for checking the reachability of a remote network host called?

A

Ping

72
Q

A network manager cannot communicate with a system on the network that has an Internet Protocol (IP) address of 192.150.060.024. The network manager enters the command arp -a 192.150.060.024.

What is the result of entering this command?

A

The command arp -a 192.150.060.024 will provide the contents of the Address Resolution Protocol (ARP) cache. The command will only show the contents for this Internet Protocol (IP) address. The command can also be used without an IP address to view the entire table.

73
Q

A workstation’s network board is currently configured as follows:

Network Speed = Auto
Duplexing = Auto
The workstation is experiencing poor network performance, and you suspect that the network board is incorrectly detecting the network speed and duplex settings. Upon investigation, you find that it’s running at 10 Mbps half-duplex. You know that your network switch is capable of much faster throughput. To fix this issue, you decide to manually configure these settings on the workstation.

Before you do so, you need to verify the switch port configuration for the connected workstation.

Given that it’s a Cisco switch, which commands can you use on the switch to show a list of all switch ports and their current settings? (Select two.)

show interface

show interface capabilities

show interface ethernet counters

show running-config interface

A

show interface

show running-config interface

74
Q

After plugging a cable into a computer, a user reports there is no network access.

Which of the following tools would the technician MOST likely check to verify that the cable was crimped correctly?

A

Cable certifier

75
Q

A systems administrator is unable to ping remote hosts from a Debian server. However, remote hosts can ping the server. The administrator troubleshoots the issue by examining the OUTPUT chain.

Which of the following tools meets the administrator’s needs to troubleshoot the issue?

A

The iptables command line utility is used to edit the rules enforced by the Linux kernel firewall. It can change INPUT, OUTPUT and FORWARD chains that are firewall rulesets.

Network Plus (5 decks)

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