CompTIA JK0-019 Online Practice Questions and Exam Preparation

CompTIA JK0-019 Online Questions & Answers

• Question 681:

  A technician enters a username and password once and can access multiple databases without being prompted to reenter their password. This is an example of which of the following?

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

• Question 682:

  Ann, a technician, installs a wireless router in a network closet in a large office. She then configures all workstations in various offices on that floor to use the wireless connection. Maximum connection speed at each workstation is 54 Mbps. Some users complain that their network connection is very slow. Which of the following is MOST likely the problem?

  A. Workstations were configured with the wrong connection speed on the wireless adapter.
  B. Users with a slow connection are too far away from the wireless router.
  C. Users that cannot connect are configured on the wrong channel.
  D. Wireless network SSID is incorrect.
  B. Users with a slow connection are too far away from the wireless router.

• Question 683:

  The network administrator just upgraded all of the WAPs to new ones with 2.4 GHz b/g/n support. The new WAPs reuse the same location and channel as the previous one and with no new external interference detected. However, performance issues are now occurring that did not exist before. Which of the following would correct the issue?

  A. Configure Wi-Fi Multimedia support
  B. Use only 20 MHz channel bandwidth
  C. Enable band steering to use 802.11n
  D. Configure Quality of Service
  B. Use only 20 MHz channel bandwidth

• Question 684:

  A network administrator has been assigned the 192.168.2.64/26 network and assigns the following computer's IP addresses:

  192.168.2.70

  192.168.2.100

  192.168.2.125

  192.168.2.130

  When the administrator tries to ping the other computers from 192.168.2.130, an ECHO REPLY is not received. Which of the following must the network administrator do?

  A. Change the IP of 192.168.2.130 to 192.168.1.128.
  B. Change the IP of 192.168.2.130 to 192.168.2.126.
  C. Change the default gateway of 192.168.2.130 accordingly.
  D. Reconfigure the switch for the right VLAN.
  B. Change the IP of 192.168.2.130 to 192.168.2.126.

• Question 685:

  A technician is tasked with rewiring a CAT5e SOHO network with 10 existing computers. The users are currently running at 100 Mbps and would like to be upgraded to 1000 Mbps. Which of the following should the technician do FIRST?

  A. Upgrade the existing computers
  B. Purchase a new 802.11ac access point and install.
  C. Install CAT6 wiring for the SOHO network
  D. Verify the network cards can support 1Gbps
  D. Verify the network cards can support 1Gbps

• Question 686:

  Which of the following is a common connector used on a coaxial cable?

  A. RJ-45
  B. DB-25
  C. BNC
  D. LC
  C. BNC

• Question 687:

  Which of the following devices allows for multiple web servers to host the same web page and for traffic to be distributed between them according to some metric?

  A. Proxy server
  B. VPN concentrator
  C. Load balancer
  D. Content filter
  C. Load balancer

• Question 688:

  Which of the following protocols resolves IP addresses to MAC addresses?

  A. DNS
  B. ARP
  C. RARP
  D. NTP
  B. ARP

  ---

  ARP is used to convert an IP address to a physical address such as an Ethernet address. ARP has been implemented with many combinations of network and data link layer technologies, such as IPv4, Chaosnet, DECnet and Xerox PARC Universal Packet (PUP) using IEEE 802 standards, FDDI, X.25, Frame Relay and Asynchronous Transfer Mode (ATM). IPv4 over IEEE 802.3 and IEEE 802.11 is the most common case.

• Question 689:

  A technician is asked to filter inbound and outbound traffic of a specific service on the network. Which of the following would BEST allow the technician to comply with the request?

  A. MAC filtering
  B. IP filtering
  C. Port filtering
  D. Content filtering
  C. Port filtering

• Question 690:

  After deploying a network switch, the network administrator is unable to remotely administer the device. The network administrator notices that the switch has the following configuration. Which of the following is the MOST likely cause of this issue? Management LAN: 192.168.10.0/24

  Management interfacE. 192.168.10.2 255.255.255.0

  Default gateway: 192.168.11.1

  STP is enabled

  A. VLAN assignment
  B. Wrong subnet mask
  C. Switching loop
  D. Wrong gateway
  D. Wrong gateway