CompTIA JK0-019 Online Practice Questions and Exam Preparation

CompTIA JK0-019 Online Questions & Answers

• Question 441:

  Which of the following is the Telco end of a T1 demarc?

  A. Smart jack
  B. Network tap
  C. Proxy server
  D. IDF
  A. Smart jack

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  Smartjacks provides diagnostic capabilities. A very common capability provided by a smartjack is loopback, such that the signal from the telephone company is transmitted back to the telephone company. This allows the telephone company to test the line from the central office, without the need to have test equipment at the customer site. The telephone company usually has the ability to remotely activate loopback, without even needing personnel at the customer site. When looped back, the customer equipment is disconnected from the line.

• Question 442:

  A network technician recently replaced a managed switch in an enterprise network with a new managed switch. Users on the switch can communicate with each other but now cannot access other network segments. Which of the following is the MOST likely reason that the users are unable to access any network segments?

  A. The newly installed switch is defective and must be returned.
  B. The newly installed switch is using a different MAC address than the previous switch.
  C. The technician forgot to change the VTP mode on the new switch to server.
  D. The technician did not use the correct cable when trunking the new switch.
  D. The technician did not use the correct cable when trunking the new switch.

• Question 443:

  At which of the following layers do frames exist? (Select TWO).

  A. OSI model Data link layer
  B. TCP/IP model Network Interface layer
  C. OSI model Physical layer
  D. OSI model Network layer
  E. TCP/IP model Internet layer
  A. OSI model Data link layer
  B. TCP/IP model Network Interface layer

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  The data link layer is concerned with local delivery of frames between devices on the same LAN. Data-link frames, as these protocol data units are called, do not cross the boundaries of a local network. Inter-network routing and global addressing are higher layer functions, allowing data-link protocols to focus on local delivery, addressing, and media arbitration. In this way, the data link layer is analogous to a neighborhood traffic cop; it endeavors to arbitrate between parties contending for access to a medium, without concern for their ultimate destination.

• Question 444:

  A new technician has been tasked with implementing a QoS policy for the Network. The technician decides it would be best to monitor the information traversing the network to gain statistical information on ports and protocols utilized. Which of the following tools should the technician use to complete this objective QUICKEST?

  A. Traffic analyzer
  B. Network sniffer
  C. SNMPv3
  D. System logs
  A. Traffic analyzer

• Question 445:

  A network administrator suspects a broadcast storm is causing performance issues on the network. Which of the following would be used to verify this situation?

  A. Environmental monitor
  B. Multimeter
  C. Toner probe
  D. Protocol analyzer
  D. Protocol analyzer

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  A "Protocol analyzer" is a tool (hardware or software) used to capture and analyze signals and data traffic over a communication channel.

• Question 446:

  Which of the following would a network administrator recommend to satisfy fault tolerance needs within the datacenter?

  A. Multimode fiber
  B. Setting up a new hot site
  C. Central KVM system
  D. Central UPS system
  D. Central UPS system

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  For unintruppted power supply we need ups as from this no power issue will come and our systems will remain safe.

• Question 447:

  A network administrator needs to deploy seven equally spaced WAPs along an underground tunnel. Which of the following is the BEST channel design to avoid interference?

  A. 1, 3, 5, 7, 9, 11, 1
  B. 1, 6, 11, 1, 1, 6, 11
  C. 1, 11, 1, 11, 1, 11, 1
  D. 11, 1, 6, 11, 1, 6, 11
  D. 11, 1, 6, 11, 1, 6, 11

• Question 448:

  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?

  A. The public IP address of the network has changed.
  B. The camera has received a new firmware update.
  C. The camera's secure shell has been disabled.
  D. The router has changed the IP of the mobile device.
  A. The public IP address of the network has changed.

• Question 449:

  Which of the following is used to ensure traffic flows efficiently on multiple T-1 circuits?

  A. DNS server
  B. Content filter
  C. Proxy server
  D. Load balancer
  D. Load balancer

• Question 450:

  Which of the following WAN technologies has a MAXIMUM speed of 155.52Mbps?

  A. OC-3
  B. T3
  C. OC-12
  D. E1
  A. OC-3