CompTIA JK0-019 Online Practice Questions and Exam Preparation

CompTIA JK0-019 Online Questions & Answers

• Question 811:

  A network administrator is tasked with deploying a company-wide wireless system which allows for accurate tracking of employees' wireless device locations via WAP triangulation. Which of the following is the MOST important aspect of the deployment?

  A. WAP placement
  B. TX/RX channel
  C. Signal strength
  D. Transmission power
  A. WAP placement

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  Before going ahead with the deployment, the first thing that need to be check is where you are going to place your wireless router so that you can have internet connectivity from every location that you need.

• Question 812:

  Which of the following do DHCP servers provide to requesting devices on the network? (Select TWO).

  A. Encryption
  B. Leases
  C. SSID
  D. Channels
  E. Suffixes
  F. VLAN assignments
  B. Leases
  E. Suffixes

• Question 813:

  A technician has been tasked with planning and implementing a new wired-only network for a small office. A hardware list has been compiled, but the technician is unsure about the final necessary item. Which of the following will BEST complete the small wired network setup?

  (1)

  1000 foot CAT6 spool

  (1)

  crimper

  (1)

  16 port gigabit switch

  (20)

  RJ-45 connectors

  (12)

  RJ-45 wall jacks

  (1)

  ____________

  A. Compression tool
  B. Punch down tool
  C. Network map
  D. Multimeter
  B. Punch down tool

• Question 814:

  Which of the following commands will provide an administrator with the number of hops a packet takes from host to host?

  A. nslookup
  B. ping
  C. traceroute
  D. route
  C. traceroute

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  In computing, traceroute is a computer network diagnostic tool for displaying the route (path) and measuring transit delays of packets across an Internet Protocol (IP) network. The history of the route is recorded as the round-trip times of the packets received from each successive host (remote node) in the route (path); the sum of the mean times in each hop indicates the total time spent to establish the connection.

• Question 815:

  A network administrator is reviewing logs and notices that a device with a public IP address is trying to access the web server RDP port. Which of the following tools can be used to resolve the domain of the public IP address?

  A. arp
  B. nslookup
  C. ipconfig
  D. netstat
  B. nslookup

• Question 816:

  A user is connecting to the Internet at an airport through an ad-hoc connection. Which of the following is the MOST likely security threat?

  A. Man-in-the-middle
  B. Social engineering
  C. Phishing
  D. DoS
  A. Man-in-the-middle

  ---

  A man in the middle attack is one in which the attacker intercepts messages in a public key exchange and then retransmits them, substituting his own public key for the requested one, so that the two original parties still appear to be communicating with each other.

• Question 817:

  Which of the following connector types is MOST commonly used for serial connections?

  A. MTRJ
  B. RJ-11
  C. RS-232
  D. RJ-45
  C. RS-232

• Question 818:

  Which of the following can be used to limit wireless network access to a single computer?

  A. Configure PPP
  B. Packet sniffing
  C. MAC address filtering
  D. Omni-directional antennas
  C. MAC address filtering

  ---

  Wireless access can be filtered by using the Media Access Control (MAC) addresses of the wireless devices transmitting within your wireless network. You can either permit or prevent specific wireless computers and devices access to your wireless network.

• Question 819:

  A user's laptop is unable to keep a stable network connection. Which of the following measures would MOST likely need to be configured?

  A. SSID name
  B. WAP encryption strength
  C. WAP radio power
  D. Channel overlay
  C. WAP radio power

  ---

  WAP radio power is the signal strength through which you can specify the range from which you can stay connected to the network and access internet. Here, when the user is not able to maintain a stable connection then it is a problem with the signal strength for sure so you can try to increase the signal strength by increasing the radio power.

• Question 820:

  A network administrator wants to see what ports are open on a server. Which of the following commands will show open ports?

  A. netstat
  B. tracert
  C. nbtstat
  D. nslookup
  A. netstat

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  Netstat command displays various network related information such as network connections, routing tables, interface statistics, masquerade connections, multicast memberships etc.