CompTIA JK0-016 Online Practice Questions and Exam Preparation

CompTIA JK0-016 Online Questions & Answers

• Question 601:

  Which of the following is the only standard that can operate at either frequency?

  A. 802.11a
  B. 802.11b
  C. 802.11g
  D. 802.11n
  D. 802.11n

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  Only 802.11n can operate at 2.4 Ghz and 5Ghz

• Question 602:

  Management has decided that they want a high level of security. They do not want Internet requests coming directly from users. Which of the following is the BEST recommendation?

  A. Content filter
  B. Proxy server
  C. Layer 3 switch
  D. Firewall
  B. Proxy server

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  A proxy server is a server (a computer system or an application) that acts as an intermediary for requests from clients seeking resources from other servers.

• Question 603:

  Network upgrades have been completed and the WINS server was shutdown. It was decided that NetBIOS network traffic will no longer be permitted. Which of the following will accomplish this objective?

  A. Content filtering
  B. Port filtering
  C. MAC filtering
  D. IP filtering
  B. Port filtering

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  TCP/IP port filtering is the practice of selectively enabling or disabling Transmission Control Protocol (TCP) ports and User Datagram Protocol (UDP) ports on computers or network devices. When used in conjunction with other security practices, such as deploying firewall software at your Internet access point, applying port filters to intranet and Internet servers insulates those servers from many TCP/IP-based security attacks, including internal attacks by malicious users.

• Question 604:

  The phone company has provided a channelized T1 line. Which of the following should this line be connected to?

  A. Switch
  B. CSU/DSU
  C. IDF
  D. MDF
  B. CSU/DSU

• Question 605:

  At which of the following layers of the OSI model is the Logical Link Control found?

  A. Layer 2
  B. Layer 3
  C. Layer 4
  D. Layer 5
  A. Layer 2

• Question 606:

  Which of the following is used for SONET connections and requires a wavelength of 1310nm?

  A. 10GBASECX4
  B. 10GBASELX4
  C. 10GBASELW
  D. 10GBASESR
  C. 10GBASELW

• Question 607:

  Which of the following is the radio frequency and data rate for 802.11g as specified by the IEEE standards?

  A. 2.0 GHz at 33 Mbps
  B. 2.4 GHz at 54 Mbps
  C. 2.4 GHz at 128 Mbps
  D. 5.0 GHz at 54 Mbps
  B. 2.4 GHz at 54 Mbps

• Question 608:

  Which of the following standards can operate at either 20MHz or 40MHz channel spacing?

  A. 802.11a
  B. 802.11b
  C. 802.11g
  D. 802.11n
  D. 802.11n

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  The 2.4 GHz ISM band is fairly congested. With 802.11n, there is the option to double the bandwidth per channel to 40 MHz which results in slightly more than double the data rate. However, when in 2.4 GHz, enabling this option takes up to 82%[10] of the unlicensed band, which in many areas may prove to be infeasible. The specification calls for requiring one primary 20 MHz channel as well as a secondary adjacent channel spaced ?0 MHz away. The primary channel is used for communications with clients incapable of 40 MHz mode. When in 40 MHz mode, the center frequency is actually the mean of the primary and secondary channels.

• Question 609:

  A network administrator notices that load balancing is not working properly on the web cluster as previously configured. In speaking with management, a change to the IP addressing scheme was made yesterday which possibly affected one member of the cluster. Due to the timing of the events, the administrator theorizes that this change caused the problem. Which of the following should the administrator do NEXT?

  A. Escalate to the management team
  B. Change the IP address back to its previous state
  C. Test the theory by analyzing logs
  D. Create a plan of action to present to management
  C. Test the theory by analyzing logs

• Question 610:

  Which of the following reside at a minimum of Layer 3 of the OSI model? (Select TWO).

  A. Hub
  B. Switch
  C. MAC address
  D. IP address
  E. Router
  D. IP address
  E. Router