CompTIA JK0-016 Online Practice Questions and Exam Preparation

CompTIA JK0-016 Online Questions & Answers

• Question 761:

  A network technician is concerned that a user is utilizing a company PC for file sharing and using a large amount of the bandwidth. Which of the following tools can be used to identify the IP and MAC address of the user's PC?

  A. System log
  B. History log
  C. Network sniffer
  D. Nslookup
  C. Network sniffer

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  Network sniffer is a computer program or a piece of computer hardware that can intercept and log traffic passing over a digital network or part of a network. As data streams flow across the network, the sniffer captures each packet and, if needed, decodes the packet's raw data, showing the values of various fields in the packet, and analyzes its content according to the appropriate RFC or other specifications.

• Question 762:

  Which of the following performs authentication and provides a secure connection by using 3DES to encrypt all information between two systems?

  A. HTTPS
  B. SSH
  C. RSA
  D. SSL
  B. SSH

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  DES encryption algorithm encrypts data three times. Three 64-bit keys are used, instead of one, for an overall key length of 192 bits (the first encryption is encrypted with second key, and the resulting cipher text is again encrypted with a third key).

• Question 763:

  When installing new WAPs in a small office, which of the following is the BEST way to physically mitigate the threats from war driving?

  A. Implement multiple wireless encryption techniques.
  B. Implement PoE on each WAP.
  C. Decrease signal strength.
  D. Increase signal strength.
  C. Decrease signal strength.

• Question 764:

  If a NIC does not have a link light, there is a failure at which of the following OSI layers?

  A. Physical
  B. Session
  C. Data link
  D. Presentation
  A. Physical

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  The NIC does not have light refers to a situation that there could be a fault in the LAN cable or the ports are down and all of these fall under the physical layer. To make it simple, it falls in physical layer because blinking lights refers to the physical connectivity.

• Question 765:

  In order for switching loops to be automatically disabled, which of the following needs to be implemented?

  A. Routing tables
  B. Collision domains
  C. Port mirroring
  D. Spanning-tree protocol
  D. Spanning-tree protocol

• Question 766:

  Which of the following source ports is MOST likely to be used by a client when making an outbound TCP connection to a windows server?

  A. 80
  B. 445
  C. 3000
  D. 3389
  C. 3000

• Question 767:

  Which of the following properties of DHCP would a technician use to ensure an IP address is not leased out from the active scope?

  A. Reservations
  B. Lease times
  C. Removing IPs from the active leases
  D. Configuring the DNS options
  A. Reservations

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  Reservations are permanent lease assignments that are used to ensure that a specified client on a subnet can always use the same IP address. You can use DHCP reservations for hosts that require a consistent IP address, but do not need to be statically configured.

• Question 768:

  A newly hired technician is sent to an alternate site to complete the build out of large scale LAN. Which of the following tools should the technician have on hand to install the bulk CAT6 cable? (Select TWO).

  A. Loopback plug
  B. Multimeter
  C. OTDR
  D. Crimper
  E. Cable tester
  F. TDR
  D. Crimper
  E. Cable tester

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  A cable tester is an electronic device used to verify the source of electric current, voltage and a switching matrix used to connect the current source and the volt meter to all of the contact points in a cable.

• Question 769:

  Which of the following should be installed to prevent inappropriate websites from being viewed?

  A. Load balancer
  B. VPN concentrator
  C. Content filter
  D. Proxy server
  C. Content filter

• Question 770:

  A company would like their technicians to be able to connect to employee desktops remotely via RDP. Which of the following default port numbers need to be opened on the firewall to support this?

  A. 143
  B. 443
  C. 3389
  D. 8080
  C. 3389