JK0-019 CompTIA E2C Network + Certification Exam Set 5

A user does not have network connectivity. While testing the cable the technician receives the below reading on the cable tester:

1-----------1

2-----------2

3-----------3 

4-----------4

5-----------5

6-----------6

7-----------7

8-----------8

Which of the following should the technician do NEXT? 


Options are :

  • Pin 3 is not used for data, replace the NIC
  • Pin 3 is not used for data, continue troubleshooting
  • Cable is a crossover, continue troubleshooting
  • Redo the cableís connectors (Correct)

Answer : Redo the cableís connectors

A user is on a network with two upstream connections to the Internet and is experiencing intermittent issues while connecting to websites. Some websites are available but others are not. Which of the following is the MOST likely cause of the condition? 


Options are :

  • Bad or missing routes (Correct)
  • Wrong subnet mask
  • Incorrect VLAN assignment
  • Switching loop

Answer : Bad or missing routes

A user reports that they keep getting disconnected on the wireless network. After further investigation, the technician confirms that this occurs only in that userís office. Which of the following would MOST likely cause them to lose their connection? 


Options are :

  • Interference (Correct)
  • Disabled wireless adapter
  • Encryption type
  • SSID mismatch

Answer : Interference

Joe, a network technician, is asked to install a couple new WAPís inside a back warehouse that was added to a main warehouse facility that already has complete wireless coverage on both the 2.4GHz and 5GHz frequencies. Joe already has a complete wireless heat map of the main warehouse. Which of the following is the first step that Joe should do before choosing which WAPís to use?   


Options are :

  • Ask the systems administrator which WAPís are preferred.
  • Only order WAPís that support 5GHz channels.
  • Conduct a wireless survey of the back warehouse. (Correct)
  • Ask the vendor that provided the WAPís for the main warehouse for recommendations.

Answer : Conduct a wireless survey of the back warehouse.

An administrator has created several virtual machines on the same host server and requires them to each be on separate VLANs. Which of the following should the administrator configure to meet this goal? 


Options are :

  • Set the VLAN preferences on the host's NIC
  • Change the virtual machine NIC settings from private to bridged
  • Create each VLAN on the host's virtual switch (Correct)
  • Create each VLAN on the host's gateway router

Answer : Create each VLAN on the host's virtual switch

Several mobile users from various areas are reporting intermittent connectivity issues. Which of the following is the MOST likely cause?   


Options are :

  • Encryption strength
  • Interference (Correct)
  • Incompatible NIC
  • SSID mismatch

Answer : Interference

A technician grabs a network cable and connects two switches together. However, the ports fail to come up as indicated by the link lights. Which of the following is MOST likely the issue? 


Options are :

  • Mismatched MTU size
  • Wrong subnet mask on the interfaces
  • SSID mismatch between the switches
  • Straight through instead of cross over cable (Correct)

Answer : Straight through instead of cross over cable

In a newly installed LAN, the network administrator receives many calls about intermittent or slow connectivity to the authentication server. Which of the following could cause this problem? (Select TWO).

A. VLAN configuration error

B. Cables too short

C. Cable crosstalk

D. Incorrect channel

E.   EMI

F. Wrong subnet mask 


Options are :

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

Answer : C,E

A new technician has moved the wireless access point from the middle of the office to an area near a corner office. Wireless users are MOST likely to experience issues with which of the following?   


Options are :

  • SSID mismatch
  • Channel mismatch
  • Encryption mismatch
  • Signal strength (Correct)

Answer : Signal strength

Joe, a vendor, walks into a customerís site with a laptop. While waiting for his contact to arrive, he wants to check his email. He discovers the SSID for the siteís wireless network and receives a valid guest password from the receptionist. He is, however, unable to connect. Which of the following is MOST likely the problem? 


Options are :

  • The customerís IT department blocks all visitors from connecting to their network.
  • The customerís wireless router uses WPA encryption.
  • The customerís WAP uses WEP encryption.
  • The wireless router at the customerís site is configured with MAC filtering. (Correct)

Answer : The wireless router at the customerís site is configured with MAC filtering.

A technician is installing a switch that will be used for VoIP and data traffic. The phones do not support the 802.3af standard. Which of the following should the technician configure on the switch? 


Options are :

  • PoE
  • VLAN
  • QoS (Correct)
  • VTP

Answer : QoS

A technician needs to install network device in a SOHO network. The office requires 9 wired workstations to share and print data. Which of the following can the technician use?   


Options are :

  • A wired router with an 8 port switch and a WAN port.
  • A 8 port firewall with one console port.
  • A 12 port unmanaged switch. (Correct)
  • A wireless router with an 8 port switch, and a WAN port.

Answer : A 12 port unmanaged switch.

A company has installed a wireless network for visitors to use. They wish to give the visitors easy access to that network. Based on the configurations below, which of the following should the administrator change?

Access Point 1Access Point 2

802.11g802.11b

Encryption: WPA2Encryption: WEP

Channel: 1Channel: 7   

SSID. CompanyWiFiSSID. Visitor 


Options are :

  • Disable SSID broadcasting on Access Point 1.
  • Change the encryption on Access Point 2 to WPA2.
  • Change the SSID on Access Point 2 to OPEN
  • Remove the WEP encryption from Access Point 2. (Correct)

Answer : Remove the WEP encryption from Access Point 2.

Joe, a technician, is attempting to connect two hubs to add a new segment to his local network. He uses one of his CAT5 patch cables to connect them; however, he is unable to reach the new network segment from his workstation. He can only connect to it from a workstation within that segment. Which of the following is MOST likely the problem? 


Options are :

  • One of the hubs is defective.
  • The patch cable needs to be a CAT6 patch cable.
  • The technician used a straight-through cable. (Correct)
  • The new hub is powered down.

Answer : The technician used a straight-through cable.

A technician is troubleshooting a wireless network that was setup previously. The network is a hybrid of 802.11g and 802.11n WAPs. Users are not able to view or connect to the 802.11n WAPs. Which of the following is MOST likely the cause? 


Options are :

  • The 802.11n WAPs are using a 2.4 GHz frequency channel.
  • The 802.11g WAPs are not setup for backwards compatibility.
  • The 802.11n WAPs are using a 5 GHz frequency channel (Correct)
  • The 802.11g WAPs all have disabled SSID broadcast.

Answer : The 802.11n WAPs are using a 5 GHz frequency channel

Several users are reporting that they are unable to connect to the network. After further investigation, the network administrator notices that a newly configured Layer 2 device lost its configuration. Which of the following MOST likely caused the issue?   


Options are :

  • Power failure (Correct)
  • Wrong default gateway
  • Switching loop
  • Wrong DNS

Answer : Power failure

Which of the following is a value that can be received from a DHCP server? 


Options are :

  • SMTP server address
  • Bootp server address (Correct)
  • WWW server address
  • VPN server address

Answer : Bootp server address

Which of the following copper cable types should be chosen to run gigabit speeds through a dropped ceiling that returns airflow?   


Options are :

  • Non-Plenum CAT5e
  • Plenum CAT5e (Correct)
  • Plenum CAT5
  • Non-Plenum CAT5

Answer : Plenum CAT5e

A technician is troubleshooting a network camera. The technician restarted the modem and now the camera is no longer available from a mobile device. Which of the following has MOST likely occurred?   


Options are :

  • The router has changed the IP of the mobile device
  • The public IP address of the network has changed. (Correct)
  • The cameraís secure shell has been disabled.
  • The camera has received a new firmware update.

Answer : The public IP address of the network has changed.

A stateful point to point wireless connection going down for a few hours at a time is MOST likely due to which of the following? 


Options are :

  • Incorrect MTU size
  • Incorrect IP
  • Interference (Correct)
  • Configuration

Answer : Interference

A user at a small business states that they cannot connect to the Internet via the companyís wireless network every time their cordless phone rings. Which of the following is MOST likely occurring? 


Options are :

  • Latency
  • Interference (Correct)
  • SSID mismatch
  • Incorrect encryption type

Answer : Interference

Users notice a problem with their network connectivity when additional lights are turned on. Which of the following would be the cause for this problem?   


Options are :

  • Open short
  • DDOS
  • Cross talk
  • EMI (Correct)

Answer : EMI

A new SOHO wireless network is set up using two access points with separate SSIDs on the same frequency. However, the users are experiencing intermittent connectivity on both SSIDs. Which of the following is the problem? 


Options are :

  • Encryption type
  • Incorrect channel (Correct)
  • SSID mismatch
  • Wrong DNS

Answer : Incorrect channel

A technician is troubleshooting a printing issue where some users in an office are unable to print. Which of the following should be the FIRST step in troubleshooting this issue? 


Options are :

  • Ask users if anything changed in their environment recently (Correct)
  • Power cycle the printer
  • Advise users to move to a different office
  • Reboot each of the workstations

Answer : Ask users if anything changed in their environment recently

A new employee was given the following information to connect to the corporate wireless network for the first time: 

SSID:CorporateWiFi

Encryption:WPA2

Password:SuperSecret!   

The user enters the correct SSID and notices that encryption type or password are not required when configuring the laptop in the office, and the laptop successfully connects to the Internet. When the user brings the laptop to the conference room, a pop-up asks for the CorporateWiFi password. Which of the following is the MOST likely cause of this behavior? 


Options are :

  • MAC filtering is only enabled in the conference room.
  • The laptop wireless network card is incompatible with the conference room WAP.
  • The office walls prevent the employee from making a full connection
  • A rogue access point was installed by a company employee. (Correct)

Answer : A rogue access point was installed by a company employee.

Which of the following must a technician enable on a switch in order to be able to view all of the packets traversing a switch using a packet sniffer?   


Options are :

  • VLANs
  • STP
  • PoE
  • Port Mirroring (Correct)

Answer : Port Mirroring

A technician installs a wireless router on an existing network by connecting it directly to the firewall. By default, the main network is a Class A network, while the wireless network is a Class C network. After the wireless router is installed, users connected to the wireless network report they are unable to connect to the Internet. Which of the following needs to be configured to BEST resolve this issue? 


Options are :

  • Allow the main network to handle DHCP (Correct)
  • Configure the main network to Class C
  • Allow for duplicate IP addresses
  • Create a spanning tree to prevent switching loops

Answer : Allow the main network to handle DHCP

Which of the following is an example of a CSMA/CD medium? 


Options are :

  • WEP
  • Ethernet (Correct)
  • SONET
  • Token ring

Answer : Ethernet

A small office is looking to deploy wireless to cover one half of the work area only. The technician is restricted to suspending the WAP in the middle of the office due to network jack limitations. Which of the following antenna types would BEST meet these requirements? 


Options are :

  • Omni-directional
  • Dipole
  • Parabolic
  • Directional (Correct)

Answer : Directional

A technician is troubleshooting a desktop computer that will not power on. After replacing the power supply, the technician tries to start the desktop, but it still fails to power on. Which of the following troubleshooting steps should the technician do NEXT? 


Options are :

  • Re-establish theory of probable cause (Correct)
  • Question users to determine if anything has changed
  • Escalate problem to upper management
  • Document replacement of power supply

Answer : Re-establish theory of probable cause

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