CompTIA JK0-019 Online Practice Questions and Exam Preparation

CompTIA JK0-019 Online Questions & Answers

• Question 261:

  Which of the following authentication solutions use tickets that include valid credentials to access additional network resources?

  A. Kerberos
  B. RADIUS
  C. Multi-factor authentication
  D. TACACS+
  A. Kerberos

• Question 262:

  After a network technician has added a new workstation and cabling to the network, users report the network is very slow. The activity lights on all switches are blinking rapidly, showing large amounts of traffic. Which of the following is the BEST explanation for the traffic?

  A. The new user is downloading large files.
  B. The router failed, flooding the network with beacons.
  C. The new user's IP address is a duplicate.
  D. A switching loop was created.
  D. A switching loop was created.

  ---

  A Switching loop or Bridge loop occurs in computer networks when there is more than one Layer 2 (OSI model) path between two endpoints (e.g. multiple connections between two network switches or two ports on the same switch connected to each other). The loop creates broadcast radiation as broadcasts and multicasts are forwarded by switches out every port, the switch or switches will repeatedly rebroadcast the broadcast messages flooding the network.

• Question 263:

  A technician is troubleshooting a desktop computer that will not power on. After replacing the power supply, the technician tries to start the desktop, but it still fails to power on. Which of the following troubleshooting steps should the technician do NEXT?

  A. Question users to determine if anything has changed
  B. Re-establish theory of probable cause
  C. Escalate problem to upper management
  D. Document replacement of power supply
  B. Re-establish theory of probable cause

• Question 264:

  Which of the following would be considered a Demarc extension?

  A. A patch cable connecting a cable modem with a wireless router
  B. Patch panel wiring
  C. Punch down block wiring
  D. Copper wire connecting the main PSTN point of entry to a wall data outlet
  D. Copper wire connecting the main PSTN point of entry to a wall data outlet

• Question 265:

  A company has one public IP address, and only one device needs to be able to connect to the Internet at a time. Which of the following is the BEST option for connectivity?

  A. VLSM
  B. CIDR
  C. NAT
  D. PAT
  C. NAT

• Question 266:

  Management has decided that they want a high level of security. They do not want Internet requests coming directly from users. Which of the following is the BEST recommendation?

  A. Content filter
  B. Proxy server
  C. Layer 3 switch
  D. Firewall
  B. Proxy server

  ---

  A proxy server is a server (a computer system or an application) that acts as an intermediary for requests from clients seeking resources from other servers.

• Question 267:

  Users are reporting a large decrease in network performance. After further investigation, the network administrator notices large amounts of traffic coming from a specific IP address. The network administrator needs to identify the payload of the network traffic. Which of the following could be used to collect that information?

  A. ipconfig
  B. ping
  C. sniffer
  D. route
  C. sniffer

• Question 268:

  A user authenticated to more than one website using their same credentials is an example of:

  A. Multifactor authentication
  B. User access control
  C. Two-factor authentication
  D. Single sign-on
  D. Single sign-on

• Question 269:

  Which of the following security appliances are used to only identify traffic on individual systems?

  A. Host based IPS
  B. Application based IPS
  C. Network based IDS
  D. Host based IDS
  D. Host based IDS

  ---

  A host-based intrusion detection system (HIDS) is an intrusion detection system that monitors and analyzes the internals of a computing system as well as the network packets on its network interfaces.

• Question 270:

  Ann, a new user, has a workstation that has connectivity to the printer located in her department, but cannot access the Internet. The result of an ipconfig command on Ann's workstation is as follows: IP address: 192.168.0.124 Subnet Mask: 255.255.255.128 Default Gateway: 192.168.0.254 Which is MOST likely preventing the user from accessing the Internet?

  A. Duplicate IP address
  B. Incorrect gateway
  C. Incorrect VLAN
  D. Bad switch port
  B. Incorrect gateway

  ---

  We usually give default gateway as an end device which is directly connected with ISP so in this case user has lost his connectivity with due to wrong default gateway configured.