CompTIA JK0-019 Online Practice Questions and Exam Preparation

CompTIA JK0-019 Online Questions & Answers

• Question 761:

  A user reports that some normally accessible external sites are not responding, but most other sites are responding normally. Which of the following is MOST likely the cause?

  A. VLAN tag mismatch
  B. Wrong subnet mask
  C. Smurf attack
  D. Faulty routing rule
  D. Faulty routing rule

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  This happens when the DNS server is able to resolve the URL but there can be a conflicting route pointing to somewhere else rather than to the correct device who is responsible for routing traffic to the internet.

• Question 762:

  The network technician has recently implemented VLANs on the company network. Ever since this implementation, sections within the company can no longer share information. While troubleshooting, the technician realizes they are unable to ping a device from another VLAN. Which of the following needs to be configured to fix this problem?

  A. Clear the ARP table
  B. Add host entries on the user's computer
  C. Configure 802.1x trunks on the switches
  D. Configure 802.1q trunks on the switches
  D. Configure 802.1q trunks on the switches

• Question 763:

  Which of the following port numbers needs to be open on a firewall to allow FTP traffic?

  A. 21
  B. 22
  C. 23
  D. 25
  A. 21

• Question 764:

  Which of the following can be used to prioritize network streams to optimize performance for certain traffic types?

  A. VLAN
  B. VPN
  C. QoS
  D. PoE
  C. QoS

• Question 765:

  Which wireless standard works at a MAXIMUM data rate of up to 11Mbps?

  A. 802.11a
  B. 802.11b
  C. 802.11g
  D. 802.1q
  B. 802.11b

• Question 766:

  A technician tests a cable going to the patch panel and notices the following output from the cable tester: 1------------------1 2------------------2 3------------------3 4------------------4 5------------------5 6------------------6 7------------------7 8------------------8 On a T568A standard CAT5e cable, which of the following wire strands is the cause of this connectivity issue?

  A. White Orange
  B. Solid Brown
  C. Solid Orange
  D. White Green
  D. White Green

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  T568A Wiring Pin Pair Wire Color

  

  white/green

  

  green

  

  white/orange

  

  blue

  

  white/blue

  

  orange

  

  white/brown

  

  brown

• Question 767:

  A NAS appliance has had a failed NIC replaced. Now the NAS appliance is no longer visible on the network. Which of the following is the MOST likely cause of the problem?

  A. The network cable connecting the NAS to the network switch is bad.
  B. The network port that the appliance is connected to is assigned to the wrong VLAN.
  C. Port security on the Ethernet switch has disabled the port.
  D. Firewall needs to be updated for the new NAS device.
  C. Port security on the Ethernet switch has disabled the port.

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  As by port security switch find the changes in mac address because nic is replaced so due to security reason switch shut that port.

• Question 768:

  A home user states during a basement remodel, one of the workers cut the network cable that goes from the modem to the WAP and nothing else has changed. According to the network troubleshooting methodology, which of the following is the NEXT step?

  A. Identify the problem
  B. Question the user
  C. Establish a plan of action
  D. Establish a theory of probable cause
  C. Establish a plan of action

• Question 769:

  You have been tasked with testing a CAT5 cable. A summary of the test results can be found on the screen.

  Step 1: Select the tool that was used to create the cable test results.

  Step 2: Interpret the best results and select the options that explains the results.

  

  

  Correct Answer. Cable certifier - incorrectly crimped cable.
  Cable certifier - incorrectly crimped cable.

• Question 770:

  Several users from the finance department report that they are able to access the Internet, but unable to connect to their financial applications. The network technician is unable to ping the finance server. The technician decides to check the switch and determines that Internet access is working. Which of the following is a possible cause of the access issues?

  A. Faulty cable
  B. Remote management disabled
  C. Improper VLAN assignment
  D. Mismatched duplex
  C. Improper VLAN assignment

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  Finance Server is placed in same VLAN which is assigned to finance users if they are able to access internet that's means connectivity to switch is good, so we have to check the VLAN assigned to users.