CompTIA JK0-019 Online Practice Questions and Exam Preparation

CompTIA JK0-019 Online Questions & Answers

• Question 171:

  Users in several departments are reporting connectivity problems. The technician examines the computer and finds the following settings. The IP address is 10.0.1.0 with a subnet mask of 255.255.252.0. The default gateway is 10.0.1.1 and the DNS server is 10.0.0.15. A user can connect to the internet but not servers on other internal subnets. The technician is not able to connect with a server with an IP of 10.0.2.25. Which of the following is MOST likely the problem?

  A. Default gateway
  B. Duplicate IP address
  C. Wrong DNS
  D. Subnet mask
  D. Subnet mask

• Question 172:

  A user at a hotel sees two SSIDs; both are called "HotelWireless". After the PC connects to one of the APs, the user notices their browser homepage has been changed. Which of the following BEST describes this AP?

  A. Man-in-the-middle
  B. DDoS
  C. Evil twin
  D. War driving
  C. Evil twin

• Question 173:

  A user wants to connect seven PCs together for a game night. Which of the following should the user install to help with this task?

  A. Media convertor
  B. Switch
  C. Firewall
  D. Bridge
  B. Switch

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  They connect multiple PCs, printers, servers and other hardware. Switches allow you to send information, such as email, and access shared resources, including printers, in a smooth, efficient, and transparent manner.

• Question 174:

  When a packet that is entering a switch port is encapsulated, which of the following is the switch performing?

  A. 802.1q
  B. Collision avoidance
  C. Port mirroring
  D. STP
  A. 802.1q

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  Encapsulation is the term associated with 802.1q which is enabled by default on many devices.

• Question 175:

  Users are reporting that external web pages load slowly. The network administrator determines that the Internet connection is saturated. Which of the following is BEST used to decrease the impact of web surfing?

  A. Caching
  B. Load balancing
  C. Port filtering
  D. Traffic analyzer
  A. Caching

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  In computer science, a cache is a component that transparently stores data so that future requests for that data can be served faster. The data that is stored within a cache might be values that have been computed earlier or duplicates of original values that are stored elsewhere. If requested data is contained in the cache (cache hit), this request can be served by simply reading the cache, which is comparatively faster.

• Question 176:

  Which of the following fiber types is MOST often used indoors?

  A. Plenum
  B. Modal conditioning
  C. Multimode
  D. Singlemode
  C. Multimode

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  Multi-mode optical fiber is a type of optical fiber mostly used for communication over short distances, such as within a building or on a campus. Typical multimode links have data rates of 10 Mbit/s to 10 Gbit/s over link lengths of up to 600 meters (2000 feet) and 10 Gbit/s for 300m (1000 feet) -- more than sufficient for the majority of premises applications.

• Question 177:

  A network consultant arrives at a customer's site to troubleshoot their email server. The server is running a Linux operating system, but the consultant is only familiar with Windows operating systems. Which of the following troubleshooting steps should the consultant take?

  A. Document findings
  B. Identify the problem
  C. Escalate the problem
  D. Establish a plan of action
  C. Escalate the problem

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  It is better to escalate the problem if you are not aware of the situation as it saves downtime and keeps customer happy.

• Question 178:

  The BEST way to determine the next hop of a packet is to check the:

  A. link state.
  B. routing table.
  C. routing metrics.
  D. convergence.
  B. routing table.

• Question 179:

  Which of the following are valid hosts for the Private IP Address range 172.16.0.x /23? (Select TWO).

  A. 172.16.0.255
  B. 172.16.0.0
  C. 172.16.1.1
  D. 172.16.8.0
  E. 172.16.256.255
  A. 172.16.0.255
  C. 172.16.1.1

• Question 180:

  A technician notices a newly installed CAT5 cable is longer than the standard maximum length. Which of the following problems would this MOST likely cause?

  A. Split cable
  B. EMI
  C. DB loss
  D. Crosstalk
  C. DB loss

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  The maximum length for a cable segment is 100 m per TIA/EIA 568-5-A. If longer runs are required, the use of active hardware such as a repeater or switch is necessary. The specifications for 10BASE-T networking specify a 100metre length between active devices. This allows for 90metres of solid-core permanent wiring, two connectors and two stranded patch cables of 5metres, one at each end.