CompTIA JK0-016 Online Practice Questions and Exam Preparation

CompTIA JK0-016 Online Questions & Answers

• Question 811:

  After a technician has identified the problem and its impact, which of the following steps should be performed NEXT?

  A. Implement preventative measures.
  B. Establish a plan of action to resolve the problem.
  C. Establish a theory of probable cause.
  D. Implement the solution or escalate as necessary.
  C. Establish a theory of probable cause.

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  By sorting out the probable causes and establishing a theorey on them he will come to know wheather it is right cause or not.

• Question 812:

  Which of the following is the OSI layer that handles file compression such as LZMA or DEFLATE?

  A. Layer 3
  B. Layer 5
  C. Layer 6
  D. Layer 7
  C. Layer 6

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  The presentation level is translator between the application and network format. Unlike the lower layers, its concern is with the syntax and semantics of the information transmitted. Most user programs do not exchange random binary bit strings. They exchange data such as names, addresses, dates, etc. Different computers store the data in a different way. In order to allow these computers to transmit the data to each other the presentation layer translates the data into a standard form to be used on the network. Another function is data compression which can be used to reduce the number of bits needed to send the packet of information. Security is also added at this layer by using data encryption and decryption. This prevents others from intercepting the data and being able to decipher the meaning of the bits.

• Question 813:

  Which of the following allows a malicious attacker to view network traffic if the attacker is on the same network segment as Joe, an administrator?

  A. DoS attack
  B. Man-in-the-middle attack
  C. Smurf attack
  D. Xmas attack
  B. Man-in-the-middle attack

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  An attack where a user gets between the sender and receiver of information and sniffs any information being sent. In some cases, users may be sending unencrypted data, which means the man-in-the-middle (MITM) can obtain any unencrypted information. In other cases, a user may be able to obtain information from the attack, but have to unencrypt the information before it can be read.

• Question 814:

  A client's computer is unable to access any network resources. Which of the following utilities can a technician use to determine the IP address of the client's machine?

  A. ipconfig
  B. nslookup
  C. dig
  D. tracert
  A. ipconfig

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  ipconfig is a commmand line utility available on all versions of Microsoft Windows starting with Windows NT. ipconfig is designed to be run from the Windows command prompt. This utility allows you to get the IP address information of a Windows computer. It also allows some control over active TCP/IP connections. ipconfig is an alternative to the older 'winipcfg' utility.

• Question 815:

  A technician is troubleshooting a host name being directed to the wrong system. The `arp ' command line utility is used to identify and display which of the following?

  A. All TCP/IP connections and listening ports
  B. Internet-to-adapter translation tables
  C. Information to help diagnose DNS issues
  D. Active sockets and connections
  B. Internet-to-adapter translation tables

• Question 816:

  A company needs to implement a secure wireless system that would require employees to authenticate to the wireless network with their domain username and password. Which of the following would a network administrator deploy to implement these requirements? (Select TWO).

  A. 802.1q
  B. MAC address filtering
  C. WPA2 Personal
  D. WPA Enterprise
  E. 802.1x
  D. WPA Enterprise
  E. 802.1x

• Question 817:

  Which of the following authentication solutions use tickets that include valid credentials to access additional network resources?

  A. Kerberos
  B. RADIUS
  C. Multi-factor authentication
  D. TACACS+
  A. Kerberos

• Question 818:

  There has been an increase in Help Desk tickets related to web portal user accounts being locked out. Which of the following resources would be used to analyze the issue?

  A. Router logs
  B. Protocol analyzer
  C. Firewall logs
  D. Application logs
  D. Application logs

• Question 819:

  Which of the following switch features allows for both incoming and outgoing data across physical ports at the same time?

  A. Burst-frame
  B. Full-duplex
  C. Half-duplex
  D. VoIP
  B. Full-duplex

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  A full-duplex (FDX), or sometimes double-duplex system, allows communication in both directions, and, unlike half-duplex, allows this to happen simultaneously. Land-line telephone networks are full-duplex, since they allow both callers to speak and be heard at the same time

• Question 820:

  A technician is troubleshooting a network issue and needs to view network traffic on a switch in real-time. Which of the following would allow the technician to view network traffic on a switch?

  A. ISAKMP
  B. Port forwarding
  C. Port security
  D. Port mirroring
  D. Port mirroring