CompTIA JK0-019 Online Practice Questions and Exam Preparation

CompTIA JK0-019 Online Questions & Answers

• Question 241:

  A technician is sorting patch cables into four bins labeled coaxial, crossover, straight- through, and fiber. The technician has a cable with RJ-45 ends. The wires at one end of the cable start with an orange-white wire, while the wires at the other end of the cable start with a green wire. Into which of the following bins should this cable be placed?

  A. Crossover
  B. Fiber
  C. Straight-through
  D. Coaxial
  A. Crossover

• Question 242:

  Which of the following uses classless subnet masks across a network?

  A. Subnetting
  B. CIDR
  C. Supernetting
  D. Summarization
  B. CIDR

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  Classless Inter-Domain Routing is based on variable-length subnet masking (VLSM), which allows a network to be divided into variously sized subnets, providing the opportunity to size a network more appropriately for local needs and also CIDR allows an address or routing prefix to be written with a suffix indicating the number of bits of the prefix, such as 192.168.2.0/24.

• Question 243:

  Management wants to be sure that the existing wiring infrastructure conforms to CAT5e standards. Which of the following is the correct tool?

  A. Cable certifier
  B. Cable tester
  C. OTDR
  D. Protocol analyzer
  A. Cable certifier

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  A cable certifier is used to verify that a cable meets its specifications such as the bandwidth and frequency. For example, it can verify a CAT 5e cable meets specifications and supports speeds of 1000Mbps.

• Question 244:

  Which of the following would a network administrator use to scan a network for vulnerabilities?

  A. ICMP
  B. NMAP
  C. ACL
  D. TCPDUMP
  B. NMAP

• Question 245:

  Which of the following cables supports 10Gbps throughput and 100 meters as the maximum distance?

  A. T1 crossover
  B. Singlemode fiber
  C. CAT6a
  D. Coaxial
  C. CAT6a

• Question 246:

  A company wants to ensure that a wireless signal from their WAP only sends down one specific corridor. Which of the following can be done to achieve this?

  A. Disable the SSID.
  B. Change the broadcast channel.
  C. Lower the signal strength.
  D. Change the antennas.
  D. Change the antennas.

• Question 247:

  GigSwitch1 is currently configured with a speed of 100 and Duplex is set to Auto on all interfaces. Interface 2 will be connected to GigSwitch2 which is used for all departments.

  Interface 1 will be used for HR traffic only.

  GigSwitch1 needs to be configured with the following parameters:

  Configure the necessary protocol to prevent switching loops

  Configure GigSwitch1 with a /24 IP address for management

  Traffic across Interface 1 needs to be forced to accept and receive up to 100Mbps data at the same time

  Traffic across Interface 2 needs to be forced to use Gigabit speeds and maximum performance

  Drag and drop the appropriate configurations to their corresponding requirements. All placeholders must be filled. Not all configurations will be used.

  Select and Place:

  

  

• Question 248:

  A network administrator is looking to implement a solution allowing users to utilize a common password to access most network resources for an organization. Which of the following would BEST provide this functionality?

  A. RADIUS
  B. Single sign on
  C. Multifactor authentication
  D. Two-factor authentication
  B. Single sign on

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  Single sign-on (SSO)is a session/user authentication process that permits a user to enter one name and password in order to access multiple applications. The process authenticates the user for all the applications they have been given rights to and eliminates further prompts when they switch applications during a particular session.

• Question 249:

  An administrator determines there are an excessive number of packets being sent to a web server repeatedly by a small number of external IP addresses. This is an example of which of the following attacks?

  A. DDoS
  B. Viruses
  C. Worms
  D. Man-in-the-middle
  A. DDoS

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  DDoS attack, a type of attack on a network that is designed to bring the network to its knees by flooding it with useless traffic. Many DoS attacks, such as the Ping of Death and Teardrop attacks, exploit limitations in the TCP/IP protocols

• Question 250:

  A user is having trouble with their fax machine disconnecting during transmissions. The technician believes that a DSL signal may be on the same line as the fax. Which of the following tools would MOST likely help prove this hypothesis?

  A. Multimeter
  B. Cable tester
  C. Lineman's handset
  D. Toner probe
  C. Lineman's handset