CompTIA JK0-019 Online Practice Questions and Exam Preparation

CompTIA JK0-019 Online Questions & Answers

• Question 71:

  The cost of installing fiber cable in a factory environment is too high. Which of the following cables should be used to minimize the effect of EMI?

  A. CAT6
  B. UTP
  C. Coaxial
  D. Crossover
  C. Coaxial

• Question 72:

  192.168.0.7/8 notation denotes which of the following IPv4 subnet masks?

  A. 255.0.0.0
  B. 255.255.0.0
  C. 255.255.255.0
  D. 255.255.255.255
  A. 255.0.0.0

• Question 73:

  Joe, a user, has a computer that has a link light on his network interface card (NIC); however, Joe is unable to access the Internet. Which of the following is the cause of this issue?

  A. Faulty GBIC
  B. Faulty SFP
  C. Cable is a crossover
  D. VLAN mismatch
  D. VLAN mismatch

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  As user has link light on NIC that means he has connectivity with switch so he need to check his vlan assignment.

• Question 74:

  A technician has been dispatched to investigate connectivity problems of a recently renovated office. The technician has found that the cubicles were wired so that the network cables were run inside the conduit with the electrical cabling. Which of the following would MOST likely resolve the connectivity issue?

  A. Power-cycle the computers and switches to re-establish the network connection.
  B. Re-run the network cabling through the ceiling alongside the lights to prevent interference.
  C. Test the wiring in the network jacks for faults using a cable verifier.
  D. Re-run the network cabling so that they are 12 inches or more away from the electrical lines.
  D. Re-run the network cabling so that they are 12 inches or more away from the electrical lines.

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  The electric cables create electric field around them and can interrupt in internet connectivity as well. It is quite possible that this is the cause which is creating the connectivity issue.

• Question 75:

  Which of the following operate at the Data Link layer of the OSI model? (Select TWO).

  A. MAC address
  B. Router
  C. Hub
  D. Switch
  E. IP address
  A. MAC address
  D. Switch

• Question 76:

  Which of the following protocols is MOST commonly associated with VoIP?

  A. LDAP
  B. HTTPS
  C. SIP
  D. SCP
  C. SIP

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  The Session Initiation Protocol (SIP) is a signaling communications protocol, widely used for controlling multimedia communication sessions such as voice and video calls over Internet Protocol (IP) networks.

• Question 77:

  Which of the following monitoring devices are used only to recognize suspicious traffic from specific software?

  A. Signature based IPS
  B. Application based IDS
  C. Anomaly based IDS
  D. Application based IPS
  B. Application based IDS

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  An APIDS monitors the dynamic behavior and state of the protocol and will typically consist of a system or agent that would typically sit between a process, or group of servers, monitoring and analyzing the application protocol between two connected devices.

• Question 78:

  Multiple computers are connected to a hub near a wall plate. In order to get to the computers, students step on and around the cable that connects the teacher's station, a few feet away, to the same hub. The teacher is experiencing no network connectivity. Which of the following is MOST likely the problem?

  A. Cross-talk
  B. Split cables
  C. Distance
  D. EMI
  B. Split cables

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  A split cable is invisible to wire maps and continuity testers, making it very difficult to troubleshoot.

• Question 79:

  Which of the following can be configured on a managed network switch to send real time alerts to a technician?

  A. SSID
  B. SMTP
  C. SNMP
  D. Syslog
  C. SNMP

• Question 80:

  A customer wants to increase firewall security. Which of the following are common reasons for implementing port security on the firewall? (Select TWO).

  A. Preventing dictionary attacks on user passwords
  B. Reducing spam from outside email sources
  C. Shielding servers from attacks on internal services
  D. Blocking external probes for vulnerabilities
  E. Directing DNS queries to the primary server
  C. Shielding servers from attacks on internal services
  D. Blocking external probes for vulnerabilities

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  Port security is required because if we keep the ports unsecure then hackers can do port scanning and can compromise the internal secured network so we will have to shield servers to avoid attacks from outside and we need to block incoming scanning request coming from outside.