CompTIA JK0-019 Online Practice Questions and Exam Preparation

CompTIA JK0-019 Online Questions & Answers

• Question 671:

  A home user wishes to secure the wireless network using strong encryption, so they decide to use AES. Which of the following would be used as the encryption method?

  A. WEP
  B. CCMP
  C. TKIP
  D. CHAP
  B. CCMP

• Question 672:

  Which of the following wireless security measures, although widely implemented, does not provide strong security?

  A. IPSec
  B. WPA2
  C. MAC address filtering
  D. 802.1x
  C. MAC address filtering

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  By MAC address filtering you can only filter layer 2 traffic but in security system layer 4 and layer 4 security is also essential.

• Question 673:

  An administrator is able to list the interfaces on a switch after providing the community string "public". Which of the protocols is the administrator MOST likely using?

  A. Telnet
  B. RADIUS
  C. SSH
  D. SNMP
  D. SNMP

• Question 674:

  Which of the following is MOST commonly implemented for remote access to UNIX systems?

  A. SSL
  B. RSH
  C. SSH
  D. RDP
  C. SSH

• Question 675:

  MIMO technology in the 802.11n standard provides for which of the following benefits?

  A. Channel expansion
  B. Gigabit wireless bandwidth
  C. Multipath support
  D. Channel bonding
  C. Multipath support

• Question 676:

  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 677:

  A user reports that several spots within the company's office have intermittent connectivity issues with the newly installed wireless network. There are several WAPs located around the office to provide a strong signal wherever the users are. Which of the following is the MOST likely cause of the problem?

  A. Incompatible network card
  B. Channel overlap
  C. Latency
  D. WEP encryption
  B. Channel overlap

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  To reduce interference between wireless APs, ensure that wireless APs with overlapping signals use unique channel frequencies. The 802.11b standard reserves 14 frequency channels for use with wireless APs.

• Question 678:

  A network administrator tests a multimode fiber cable from end-to-end on a new link that is down and notices that the dB loss is -.09. Which of the following is the MOST likely cause?

  A. TXRX reversed
  B. dB loss too high
  C. dB loss too low
  D. Bad connectors
  A. TXRX reversed

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  Some Ethernet switches support medium dependent interface crossover (MDIX),which allows a switch port to properly configure its leads as transmit (Tx) or receive (Rx) leads. You can interconnect such switches with a straight-through cable (as opposed to a crossover cable). However, if a network device does not support MDIX, it needs an appropriate cable (that is, a crossover cable ) to allow its Tx leads to connect to the Rx leads on a connected device, and vice versa. Therefore, care must be taken when selecting cable types interconnecting network components.

• Question 679:

  A SOHO client has tasked Joe, a technician, with setting up a basic SOHO network to support four laptops and one desktop PC. The client would also like to have a basic wireless network to use for internal devices only that is secure. Given the list of requirements, which of the following devices would Joe need to purchase for his client? (Select TWO).

  A. IDS
  B. Repeater
  C. Switch
  D. WAP
  E. UTM device
  C. Switch
  D. WAP

• Question 680:

  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.