CompTIA JK0-019 Online Practice Questions and Exam Preparation

CompTIA JK0-019 Online Questions & Answers

• Question 411:

  Which of the following DHCP options is used to exclude IP addresses from being distributed to other computers?

  A. Reservations
  B. Suffixes
  C. Leases
  D. Gateways
  A. Reservations

• Question 412:

  Two workstations are unable to communicate on the network despite having known good cables. When one device is unplugged from the network the other device functions properly. Which of the following could be the cause of this failure?

  A. Duplicate IP address
  B. Incorrect subnet mask
  C. Incorrect gateway
  D. Wrong DNS
  A. Duplicate IP address

• Question 413:

  A user cannot access the LAN after working successfully most of the day. Which of the following should the network administrator check FIRST?

  A. VLAN settings
  B. History logs
  C. Patch cable
  D. Port security
  C. Patch cable

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  A patch cable or patch cord or patch lead is an electrical or optical cable used to connect ("patch-in") one electronic or optical device to another for signal routing.

• Question 414:

  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?

  A. DDOS
  B. Cross talk
  C. Open short
  D. EMI
  D. EMI

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  External Machine Interface (EMI), an extension to Universal Computer Protocol (UCP), is a protocol primarily used to connect to short message service centres (SMSCs) for mobile telephones.

• Question 415:

  An administrator can use packet tags to configure which of the following?

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

• Question 416:

  Which of the following correctly lists the layers of the OSI model starting at Layer 1?

  A. Data Link, Physical, Network, Transport, Presentation, Session, Application.
  B. Physical, Data Link, Network, Transport, Presentation, Session, Application.
  C. Physical, Data Link, Transport, Network, Session, Presentation, Application.
  D. Physical, Data Link, Network, Transport, Session, Presentation, Application.
  D. Physical, Data Link, Network, Transport, Session, Presentation, Application.

• Question 417:

  The ISP needs to terminate the WAN connection. The connection should be located in the network server room where the company LAN equipment resides. Which of the following identifies the location?

  A. Smart jack
  B. MDF
  C. VPN
  D. 66 block
  B. MDF

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  Short for main distribution frame, a cable rack that interconnects and manages the telecommunications wiring between itself and any number of IDFs. Unlike an IDF, which connects internal lines to the MDF, the MDF connects private or public lines coming into a building with the internal network.

• Question 418:

  A network technician has just upgraded a switch. The new switch's IP range and subnet mask correctly match other network devices. The technician cannot ping any device outside of the switch's own IP subnet. The previous switch worked correctly with the same settings. Which of the following is MOST likely the problem?

  A. The proxy server is set incorrectly.
  B. The Ethernet cable is pinched.
  C. The network gateway is set incorrectly.
  D. The IP address is set incorrectly.
  C. The network gateway is set incorrectly.

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  When user is able to ping everything in its own subnet that means that all the hosts are reachable however when you are not able to ping anything outside of this subnet then please check if the device is sending traffic to the correct host who should forward it to the further devices.

• Question 419:

  Which of the following protocols exchange the latest information that has changed in the routing table?

  A. TFTP
  B. BGP
  C. OSPF
  D. IGMP
  C. OSPF

• Question 420:

  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?

  A. Increase the number of reservations
  B. Increase exclude list
  C. Decrease lease times
  D. Decrease the scope
  C. Decrease lease times