comptia jk0-023 practice test

CompTIA Network+ certification


Question 1 Topic 6

Topic 6
A network technician is doing a wireless audit and finds an SSID that does not match the companys 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
Answer:

D

Discussions

Question 2 Topic 6

Topic 6
A consultant is installing new WAPs for an office using wall mounts. Which of the following is the BEST location for the new
boxes for signal strength and coverage?

  • A. Above the suspended ceiling with antennas positioned upward.
  • B. Close to the floor level to allow the signal to traverse the floor laterally.
  • C. Close to the suspended ceiling, but not above.
  • D. Above the suspended ceiling with antennas positioned downward.
Answer:

C

Discussions

Question 3 Topic 6

Topic 6
Which of the following technologies allows for redundant links within a Layer 2 segment?

  • A. OSPF
  • B. RIP
  • C. Port Mirroring
  • D. Spanning Tree
Answer:

D

Discussions

Question 4 Topic 6

Topic 6
The network support team is constantly getting calls from users in a specific area of an office building. The users are able to
connect to the office wireless network, but they sometimes disconnect or experience very slow download speeds. Which of
the following is MOST likely the problem?

  • A. Incorrect service set identifier
  • B. Low signal strength or interference
  • C. Incorrect encryption scheme
  • D. Incorrect IP address or subnet mask
Answer:

B

Discussions

Question 5 Topic 6

Topic 6
A network administrator is tasked with blocking unwanted spam is being relayed by an internal email server. Which of the
following is the FIRST step in preventing spam that is originating from bots on the network?

  • A. Closing off port 25 on the firewall
  • B. Closing off port 53 on the firewall
  • C. Turning off the SMTP service on the email server
  • D. Turning off the IMAP service on the email server
Answer:

A

Discussions

Question 6 Topic 6

Topic 6
A technician is installing an 802.11n network. The technician is using a laptop that can connect at a maximum speed of 11
Mbps. The technician has configured the 802.11n network correctly but thinks it could be the type of WLAN card used on the
laptop. Which of the following wireless standards is the WLAN card MOST likely using?

  • A. 802.11a
  • B. 802.11b
  • C. 802.11g
  • D. 802.11n
Answer:

B

Discussions

Question 7 Topic 6

Topic 6
Which of the following wiring components is used as a central point of termination for all network jacks through a building
area?

  • A. Demarc
  • B. CSU
  • C. Patch Panel
  • D. Smart Jack
Answer:

C

Discussions

Question 8 Topic 6

Topic 6
Users in several departments are reporting connectivity problems. The technician examines the computer and finds the
following settings. The IP address is 10.0.1.0 with a subnet mask of 255.255.252.0. The default gateway is 10.0.1.1 and the
DNS server is 10.0.0.15. A user can connect to the internet but not servers on other internal subnets. The technician is not
able to connect with a server with an IP of 10.0.2.25. Which of the following is MOST likely the problem?

  • A. Default gateway
  • B. Duplicate IP address
  • C. Wrong DNS
  • D. Subnet mask
Answer:

D

Discussions

Question 9 Topic 6

Topic 6
A network administrator is configuring PXE boot to reimage a computer lab. Which of the following must be configured on the
existing DHCP server to specify the IP address of the imaging server from which the clients must boot?

  • A. Scope
  • B. Reservation
  • C. Option
  • D. Lease
Answer:

C

Discussions

Question 10 Topic 6

Topic 6
Zach, a technician, suspects a duplicate IP address assignment on the network. Which of the following resources can be
used to verify this problem?

  • A. Network map
  • B. Environmental monitor
  • C. Placement map
  • D. Syslog
Answer:

D

Discussions
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