CompTIA JK0-019 Online Practice Questions and Exam Preparation

CompTIA JK0-019 Online Questions & Answers

• Question 571:

  An application is using port 2000 on a PC. Which of the following could an administrator do to determine what software is listening on that port?

  A. Run netstat
  B. Run dig
  C. Run nbtstat
  D. Run tracert
  A. Run netstat

• Question 572:

  A client has just leased a new office space in a busy commercial building and would like to install a wireless network. Several other tenants are on the same floor. Multiple wireless networks are present in the building. Which of the following can be changed on the client's wireless network to help ensure that interference from other wireless networks is at a minimum?

  A. WPA encryption key selection
  B. Channel selection
  C. Antenna types
  D. Disable SSID
  B. Channel selection

• Question 573:

  Which of the following DNS records must be queried to resolve the IPv6 address of a website?

  A. CNAME
  B. PTR
  C. AAAA
  D. A
  C. AAAA

• Question 574:

  Which of the following network topologies is MOST commonly used by online file sharing websites?

  A. Point to multipoint
  B. Peer-to-peer
  C. Ring
  D. Hybrid
  B. Peer-to-peer

• Question 575:

  Several users are reporting that they are unable to connect to the network. After further investigation, the network administrator notices that a newly configured Layer 2 device lost its configuration. Which of the following MOST likely caused the issue?

  A. Wrong default gateway
  B. Wrong DNS
  C. Switching loop
  D. Power failure
  D. Power failure

• Question 576:

  Ann, a user, connects to her company's secured wireless network in the conference room when attending meetings. While using the conference room this morning, Ann notices an unsecured wireless network with the same name is available. Ann connects her laptop to this network instead of to the secured one. Ann has fallen victim to which of the following threats?

  A. Rogue access point
  B. ARP poisoning
  C. Replay attack
  D. Evil twin
  D. Evil twin

• Question 577:

  In a small office environment, one computer is set up to provide Internet access to three other computers that are not interconnected. This is an example of which of the following topology types?

  A. Peer-to-peer
  B. Point-to-multipoint
  C. Hybrid
  D. Point-to-point
  B. Point-to-multipoint

• Question 578:

  Which of the following provides RSA encryption at the session layer?

  A. SSH
  B. ISAKMP
  C. SSL
  D. TLS
  C. SSL

• Question 579:

  A technician can increase the bandwidth of an 802.11n cell by:

  A. doubling the channel width.
  B. enabling diversity.
  C. disabling MIMO.
  D. adding a second access point.
  A. doubling the channel width.

• Question 580:

  Users are contacting the internal helpdesk, stating that they are having difficulty staying connected to the wireless network. When the technician investigates, it is discovered that the users are having a problem using the wireless network in the company break rooms. Which of the following should the technician do FIRST?

  A. Install a new access point in each break room to provide adequate coverage.
  B. Remount the access points to a place on the ceiling closer to the break rooms.
  C. Unplug appliances (e.g. microwaves) to see if they are causing interference.
  D. Change the encryption on the access points from WPA2 to WEP.
  C. Unplug appliances (e.g. microwaves) to see if they are causing interference.