JK0-019 CompTIA E2C Network + Certification Exam Set 6

When a patch cable is plugged into a switch, all port activity indicators turn on and users instantly lose network connectivity. Which of the following is the MOST likely diagnosis? 


Options are :

  • Switching loop (Correct)
  • Defective patch cable
  • Denial of service attack
  • MTU black hole

Answer : Switching loop

A technician is attempting to set up a new laptop for a user. The user’s old laptop connects to the corporate wireless network “CompanyWiFi” automatically. However, when the technician looks for the “CompanyWiFi” network on the new laptop, he does not find it in the list of available networks. Both laptops have 802.11g wireless network adapters and are sitting next to each other on the user’s desk. Which of the following would MOST likely be the reason that the new laptop cannot see the “CompanyWiFi” network? 


Options are :

  • RFID interference from other electronic devices
  • SSID broadcasting is disabled on the WAP (Correct)
  • Loss of signal strength
  • Incorrect WEP key was input

Answer : SSID broadcasting is disabled on the WAP

All users on a specific network segment report losing access to the wired network. During troubleshooting, the network administrator observes link lights on the workstations. When physically reviewing each switch, the network administrator changes the switch view settings to Activity and sees that all port lights remain solid green. Which of the following is MOST likely causing this issue? 


Options are :

  • Excessive bandwidth usage
  • STP convergence
  • Broadcast storm (Correct)
  • Power failure

Answer : Broadcast storm

After a power failure, several users are unable to connect to network devices at the remote office. Which of the following is the MOST likely cause of the issue? 


Options are :

  • Missing route (Correct)
  • Duplicate IP address
  • Switching loop
  • Bad cable

Answer : Missing route

Joe, a network technician, is tasked with setting up a new wireless network in an office for office laptops and desktops only. The surrounding offices already have many wireless networks. Joe discovered that over 30 wireless networks were showing up as he completed a wireless survey of the office. Every single one of the networks that Joe was able to see while conducting the wireless survey were 802.11b/g networks. Which of the following should Joe consider before purchasing/installing the new wireless access points? 


Options are :

  • Turn the SSID broadcasts off to decrease interference.
  • Determine if the business should relocate to a building with a lot less surrounding wireless networks.
  • Determine which wireless channels and bands to use to mitigate as much interference as possible. (Correct)
  • Move the WAP so that it is close to the interior walls.

Answer : Determine which wireless channels and bands to use to mitigate as much interference as possible.

Which of the following do DHCP servers provide to requesting devices on the network? (Select TWO).

A. Encryption

B. Leases

C. SSID

D. Channels

E. Suffixes

F. VLAN assignments   


Options are :

  • C,D
  • A,F
  • B,E (Correct)
  • A,B

Answer : B,E

Users are contacting the internal helpdesk, stating that they are having difficulty staying connected to the wireless network. When the technician investigates, it is discovered that the users are having a problem using the wireless network in the company break rooms. Which of the following should the technician do FIRST? 


Options are :

  • Install a new access point in each break room to provide adequate coverage.
  • Remount the access points to a place on the ceiling closer to the break rooms.
  • Unplug appliances (e.g. microwaves) to see if they are causing interference (Correct)
  • Change the encryption on the access points from WPA2 to WEP

Answer : Unplug appliances (e.g. microwaves) to see if they are causing interference

A network administrator is replacing old switches to support a VoIP deployment. Based on this parameter, which of the following is MOST likely to be implemented on these new switches? 


Options are :

  • PoE (Correct)
  • VTP
  • STP
  • NAT

Answer : PoE

An administrator would like to get more speed out of a wireless network. The administrator decides to configure the AP with a frequency width of 40MHz. Which of the following features is the administrator MOST likely using?   


Options are :

  • MIMO
  • AP isolation
  • Channel bonding (Correct)
  • Burst mode

Answer : Channel bonding

A technician receives a work order that a user can no longer access any external websites. The user is the only one affected, but can still access websites by IP address. Which of the following is the MOST likely cause?   


Options are :

  • The workstation is configured with an incorrect IP address of the DNS server (Correct)
  • The workstation has been removed from the domain and needs to be re-added in directory services.
  • The workstation is configured to use the IPv4 protocol instead of IPv6.
  • The workstation’s DHCP IP address has expired and has assigned itself an APIPA address.

Answer : The workstation is configured with an incorrect IP address of the DNS server

A technician needs to restrict access to a SOHO wireless network to specific devices. Which of the following would MOST likely be used with minimal client configuration?   


Options are :

  • Port filtering
  • PoE
  • MAC address filtering (Correct)
  • WEP

Answer : MAC address filtering

Which of the following components of wiring distribution is referred to as the core communications closet for an organization? 


Options are :

  • MDF (Correct)
  • IDF
  • Demarc extension
  • Smart jack

Answer : MDF

A computer configured by DHCP has a listed DNS server and gateway. Which of the following allows these settings to be configured? 


Options are :

  • Scopes
  • Leases
  • Reservations
  • Options (Correct)

Answer : Options

Management wants to be sure that the existing wiring infrastructure conforms to CAT5e standards. Which of the following is the correct tool?   


Options are :

  • OTDR
  • Protocol analyzer
  • Cable tester
  • Cable certifier (Correct)

Answer : Cable certifier

Linking two or more switches together so that they can share VLAN information is known as which of the following? 


Options are :

  • Trunking (Correct)
  • Filtering
  • Port replicating
  • Spoofing

Answer : Trunking

A network has a large number of users who connect for short periods of time and the network needs to maximize the number of devices that can be configured using DHCP. Which of the following should be configured to solve this issue? 


Options are :

  • Increase the number of reservations
  • Decrease the scope
  • Increase exclude list
  • Decrease lease times (Correct)

Answer : Decrease lease times

An office has an 802.11a access point. A technician has been asked to identify devices that are compatible with this AP. Which of the following devices is MOST likely compatible?   


Options are :

  • An 802.11g laptop
  • An 802.1q SOHO router
  • An 802.11b tablet computer
  • An 802.11n smartphone (Correct)

Answer : An 802.11n smartphone

A technician wants to configure multiple switches to support all of the corporate VLANs. Which of the following will allow configuration of the switches and have the information propagate automatically to the other switches?   


Options are :

  • NTP server
  • FTP server
  • VTP server (Correct)
  • Virtual PBX

Answer : VTP server

An administrator notices that a computer on the network is unable to reach any of the servers by hostname. The computer has connectivity to the network and is able to ping all the devices by IP address. Which of the following can cause the error?   


Options are :

  • The workstation has the wrong gateway configured.
  • The workstation has been assigned to the wrong VLAN.
  • The workstation has a duplicate IP address.
  • The workstation has the wrong DNS configured. (Correct)

Answer : The workstation has the wrong DNS configured.

A technician is installing a PoE switch for VoIP phones. Which of the following is the technician MOST likely going to configure on the switch?   


Options are :

  • DHCP
  • PAT
  • QoS (Correct)
  • NAT

Answer : QoS

A user informs the network administrator of increasingly common wireless connection problems. The administrator determines the user has recently received a new cordless phone. The phone is MOST likely causing which of the following conditions? 


Options are :

  • Crosstalk
  • Interference (Correct)
  • Bouncing signal
  • Signal strength latency

Answer : Interference

A technician is implementing a wireless network at a small business. The business already has a certificate authority and RADIUS server that they would like the technician to integrate with the wireless network. Additionally, the business would like to utilize their legacy 802.11b TKIP printers. Which of the following configurations should the technician use?   


Options are :

  • 802.11g with WPA-Enterprise (Correct)
  • 802.11n with WPA2-PSK
  • 802.11a with WPA2-Enterprise
  • 802.11n with WPA-PSK

Answer : 802.11g with WPA-Enterprise

A network administrator is planning to install wireless access points across the enterprise. Which of the following should be considered when installing at remote locations?   


Options are :

  • BSSID
  • MAC filtering
  • PoE (Correct)
  • NAT

Answer : PoE

Which of the following wireless parameters may need to be modified when a new cordless telephone is installed? 


Options are :

  • IP address
  • Channel (Correct)
  • Encryption type
  • SSID

Answer : Channel

A network administrator has just been notified about the loss of Internet connectivity. Another technician had just performed non-scheduled maintenance and mentioned that some cabling may have been moved. Which of the following MOST likely caused the loss of Internet connectivity? 


Options are :

  • TX/RX cables reversed (Correct)
  • Mismatched MTU
  • Incorrect routing table
  • Broadcast storm

Answer : TX/RX cables reversed

A network administrator needs to configure a port on the switch that will enable all packets on a particular switch to be monitored. Which of the following would BEST complete this objective?   


Options are :

  • MAC filtering
  • Traffic shaping
  • VLAN trunking
  • Port mirroring (Correct)

Answer : Port mirroring

A technician has determined that calls placed over a wireless connection are breaking up and the speaker’s voices are delayed. This is making conversation difficult. This is a symptom of which of the following network issues? 


Options are :

  • Bad SFP
  • SSID mismatch
  • Bad GBIC
  • Latency (Correct)

Answer : Latency

A network administrator is setting up a WAP and wants to disable the ability of gaining access from the parking garage. Which of the following should the network administrator review? 


Options are :

  • WPA2 encryption
  • Signal strength (Correct)
  • WEP encryption
  • SSID name

Answer : Signal strength

Which of the following can MOST likely cause intermittent connection problems with a CAT5 network cable?   


Options are :

  • Cable has a twist tie attached too close to the connector.
  • Cable is too warm.
  • Cable is run too close to a fluorescent light. (Correct)
  • Cable has been looped too many times.

Answer : Cable is run too close to a fluorescent light.

Which of the following transmission methods do DHCP enabled devices use to request an IP address?   


Options are :

  • Directed broadcast
  • Unicast
  • Broadcast (Correct)
  • Multicast

Answer : Broadcast

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