CompTIA JK0-019 Online Practice Questions and Exam Preparation

CompTIA JK0-019 Online Questions & Answers

• Question 371:

  A technician finds that the network card is no longer functioning. At which of the following OSI layers is the problem occurring?

  A. Layer 1
  B. Layer 3
  C. Layer 5
  D. Layer 7
  A. Layer 1

• Question 372:

  Which of the following services are affected by closing the default ports of 80 and 21 via ACL on a company router?

  A. FTP and basic Internet traffic
  B. HTTPS and IMAP traffic
  C. DNS and TELNET traffic
  D. VPN and RDP traffic
  A. FTP and basic Internet traffic

• Question 373:

  A company has asked the network administrator to restrict access to any websites with unauthorized material. Which of the following technologies would BEST accomplish this?

  A. Content filter
  B. Packet filter
  C. IPS
  D. IDS
  A. Content filter

• Question 374:

  A new SOHO wireless network is set up using two access points with separate SSIDs on the same frequency. However, the users are experiencing intermittent connectivity on both SSIDs. Which of the following is the problem?

  A. Wrong DNS
  B. SSID mismatch
  C. Encryption type
  D. Incorrect channel
  D. Incorrect channel

• Question 375:

  A network technician has determined a managed network switch has failed. The technician knows how to install a new switch, but not how to properly configure it. Which of the following troubleshooting steps should the technician take NEXT?

  A. Escalate the problem
  B. Identify potential effects
  C. Test the theory to determine cause
  D. Establish a plan of action to resolve the problem
  A. Escalate the problem

• Question 376:

  A technician is tasked with adding an ACL to the host-based firewall of a PC. The ACL should allow the Development Server to only connect to the PC's HTTP server on the default port. Given the IP addresses below, which of the following ACLs would accomplish this goal?

  Development Server: 192.168.1.100 PC. 192.168.3.3

  A. Source. 192.168.1.100; Source Port: Any; Destination: 192.168.3.3; Destination Port:80; Action: Permit
  B. Source. 192.168.1.100; Source Port:80; Destination: 192.168.3.3; Destination Port:80; Action: Permit
  C. Source. 192.168.3.3; Source Port:80; Destination: 192.168.1.100; Destination Port: Any; Action: Permit
  D. Source. 192.168.3.3; Source Port:80; Destination: 192.168.1.100; Destination Port:80; Action: Permit
  E. Source. 192.168.1.100; Source Port: Any; Destination: 192.168.3.3; Destination Port: Any; Action: Permit
  A. Source. 192.168.1.100; Source Port: Any; Destination: 192.168.3.3; Destination Port:80; Action: Permit

• Question 377:

  A technician has spent most of the day replacing a server running DHCP. Some of the users have begun to call the help desk stating that Internet connection stopped working even after rebooting. Upon investigation, the users' PCs with issues all have IP addresses that start with 169.254.x.x. The technician completes the replacement and powers on the new DHCP server. Which of the following is the BEST way to provide the PCs with issues a new IP address?

  A. Statically assign a legitimate IP address, and then set the PCs' NICs to DHCP
  B. Inform each user to replace 169.254 with 192.168
  C. Wait five minutes until the PC resends a DHCP request
  D. Run netstat on each PC and then reboot into safe mode
  C. Wait five minutes until the PC resends a DHCP request

• Question 378:

  A network technician is doing a wireless audit and finds an SSID that does not match the company's SSID. The company uses the SSID of ABC123, and the SSID the technician found is Default. Which of the following threats did the network technician find?

  A. AP isolation
  B. DDoS
  C. Evil twin
  D. Rogue AP
  D. Rogue AP

• Question 379:

  A network technician is concerned that a user is utilizing a company PC for file sharing and using a large amount of the bandwidth. Which of the following tools can be used to identify the IP and MAC address of the user's PC?

  A. System log
  B. History log
  C. Network sniffer
  D. Nslookup
  C. Network sniffer

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  Network sniffer is a computer program or a piece of computer hardware that can intercept and log traffic passing over a digital network or part of a network. As data streams flow across the network, the sniffer captures each packet and, if needed, decodes the packet's raw data, showing the values of various fields in the packet, and analyzes its content according to the appropriate RFC or other specifications.

• Question 380:

  Ann, a technician, installs a new WAP and users are able to connect; however, users cannot access the Internet. Which of the following is the MOST likely cause of the problem?

  A. The signal strength has been degraded and latency is increasing hop count.
  B. An incorrect subnet mask has been entered in the WAP configuration.
  C. The signal strength has been degraded and packets are being lost.
  D. Users have specified the wrong encryption type and routes are being rejected.
  B. An incorrect subnet mask has been entered in the WAP configuration.

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  Due to wrong subnet entered user is unable to communicate with anyone so to communicate he needs to be in right subnet.