CompTIA JK0-019 Online Practice Questions and Exam Preparation

CompTIA JK0-019 Online Questions & Answers

• Question 381:

  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 382:

  Which of the following allows 802.11n higher transfer speeds than the previous wireless standards?

  A. Dual frequency
  B. Enhanced encryption
  C. MIMO technology D. Backwards compatibility
  C. MIMO technology D. Backwards compatibility

• Question 383:

  Which of the following layers of the OSI model make up the Network Interface layer of the TCP/IP model? (Select TWO).

  A. Application
  B. Physical
  C. Presentation
  D. Transport
  E. Data Link
  F. Network
  B. Physical
  E. Data Link

• Question 384:

  A company is looking for the simplest solution to help prioritize VoIP traffic on its congested network. Which of the following would BEST accomplish this?

  A. MPLS
  B. Caching engines
  C. QoS
  D. Load balancing
  C. QoS

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  Explanation: QoS is the service where you can prioritize traffic running over one protocol as compared to the other. It is very similar to the term where you are opening a VIP queue for allowing that traffic to pass.

• Question 385:

  Which of the following wiring distribution is used to connect wiring from equipment inside a company to carrier cabling outside a building?

  A. 66 block
  B. IDF
  C. MDF
  D. Patch panel
  C. MDF

• Question 386:

  Which of the following types of cables would be used to connect a hub to a patch panel?

  A. Straight-through cable
  B. Crossover cable
  C. T1 Crossover cable
  D. Rollover cable
  A. Straight-through cable

• Question 387:

  Stateful packet inspection is a security technology used by which of the following devices?

  A. Unmanaged switch
  B. Hardware firewall
  C. Bridge
  D. IDS
  B. Hardware firewall

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  With Stateful Packet Inspection (SPI), every time a packet is sent out of the computer, the firewall keeps track of it. When a packet comes back to the firewall, the firewall can tell whether or not the in-bound packet is a reply to the packet that was sent out.This way, the firewall can handle most network traffic safely without a complex configuration of firewall rules.

• Question 388:

  A network administrator suspects that recent traffic problems could be caused by a high CPU load on company routers. Which of the following would BEST be used to monitor CPU cycles on the routers?

  A. TACACS+
  B. SNMP
  C. Syslog
  D. DOCSIS
  B. SNMP

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  SNMP, which is widely used in local area networks (LANs), lets you monitor network nodes from a management host. You can monitor network devices such as servers, workstations, printers, routers, bridges, and hubs, as well as services such as Dynamic Host Configuration Protocol (DHCP) or Windows Internet Name Service (WINS).

• Question 389:

  203.50.5.0 is an example of which of the following network classes?

  A. Class A
  B. Class B
  C. Class C
  D. Class D
  C. Class C

• Question 390:

  An 802.11b wireless network has a maximum data rate of:

  A. 11 Mbps.
  B. 20 Mbps.
  C. 28 Mbps.
  D. 54 Mbps.
  A. 11 Mbps.