CompTIA JK0-019 Online Practice Questions and Exam Preparation

CompTIA JK0-019 Online Questions & Answers

• Question 31:

  Which of the following tools could attempt to detect operating system vulnerabilities?

  A. nslookup
  B. honeynet
  C. netstat
  D. nessus
  D. nessus

• Question 32:

  A user calls the helpdesk to report not being able to access network resources over the company's Wi-Fi connection. During information gathering, the user mentions that the wireless network their computer is signed into is not the same name as it had been previously. Which of the following is the underlying cause?

  A. SSID mismatch
  B. Incorrect WPA key
  C. Signal bounce
  D. Antenna placement
  A. SSID mismatch

• Question 33:

  Which of the following is described by the MAC address FF:FF:FF:FF:FF:FF?

  A. Unicast MAC address.
  B. Invalid MAC address.
  C. Multicast MAC address.
  D. Broadcast MAC address.
  D. Broadcast MAC address.

• Question 34:

  Which of the following ports is used by Telnet?

  A. 21
  B. 23
  C. 80
  D. 143
  B. 23

• Question 35:

  Which of the following attack types is being used if the originating IP address has been spoofed?

  A. Ping flood
  B. Trojan
  C. Smurf
  D. Worm
  C. Smurf

• Question 36:

  While working on a PC, a technician notices 0.0.0.0 in the routing table. Which of the following does this indicate?

  A. It is the default route.
  B. This is the address for the DHCP server.
  C. The PC has not been assigned an IP address.
  D. The firewall is down.
  A. It is the default route.

  ---

  The address 0.0.0.0 generally means "any address". If a packet destination doesn't match an individual address in the table, it must match a 0.0.0.0 gateway address. In other words, default gateway is always pointed by 0.0.0.0:

• Question 37:

  Which of the following is the difference between 802.11b and 802.11g?

  A. Distance
  B. Frequency
  C. Speed
  D. Transmission power
  C. Speed

  ---

  802.11b has a maximum speed of 11Mbps whereas 802.11g has a speed of 54Mbps.

• Question 38:

  Which of the following security protocols would BEST protect a connection to a remote email server and ensure full integrity of all transmitted email communication?

  A. TLS 1.2
  B. SNMPv3
  C. WPA2
  D. SMTP
  A. TLS 1.2

• Question 39:

  In a SOHO environment, placing a VoIP unit on the outside edge of a LAN router enhances which of the following network optimization methods?

  A. Load balancing
  B. Quality of service
  C. Fault tolerance
  D. Traffic shaping
  B. Quality of service

  ---

  In unified communication video, voice, data have only one end gateway so to give priority to avoid delay in voice and video we use Qos.

• Question 40:

  Hubs are differentiated from switches in that between the two, only hubs have: A. a single collision domain.

  B. a single broadcast domain.
  C. multiple collision domains.
  D. multiple broadcast domains.
  A