CompTIA A+ Core 2 Question E-42

If a technician knows a clients IP address, which of the following command tools can be used to resolve this to the DNS name?

A. NET USE
B. TRACERT
C. NSLOOKUP
D. CMD

Correct Answer: C

CompTIA A+ Core 2 Question E-6

A user calls the helpdesk and states that they suddenly cannot connect to the Internet or any other network resources. The user is on a company network that uses DHCP. The technician runs IPCONFIG from the command prompt and the PC has an IP address of 0.0.0.0. Which of the following steps should the technician perform FIRST to troubleshoot this issue?

A. Check the network cable
B. Replace network card
C. Assign a static IP address
D. Reinstall the network drivers

CompTIA A+ Core 2 Question D-93

Which of the following should a technician implement to prevent external contractors from physically plugging devices into the company’s network jacks unless such jacks are designated for guest use?

A. Disable DHCP and assign a static IP address to each network device physically connected to the network.
B. Enable MAC address filtering across all network jacks and record the MAC address of guest devices.
C. Disable all switch ports when they are not utilized and enable them on an as needed basis.
D. Place guest network jacks in public areas and all other jacks in secure areas as needed.

Correct Answer: C

Explanation:
The best way is to disable all switch ports when they are not utilized. Switch them on when you need them. This way, you can prevent external contractors from physically plugging devices in to company’s network jacks.

CompTIA A+ Core 2 Question D-63

A technician is installing a new wired router and needs to disable all the ports currently not in use. The documentation for router mentions the web interface for the router is available by default at 192.168.1.1. In which of the following ways would the technician go about doing this?

A. Place labels on top of all the ports that are not to be used.
B. Manually set the IP address to 10.168.1.1, and then access the website at 192.168.1.1.
C. Use an Internet browser to access the router configuration at 192.168.1.1.
D. Use Windows Explorer and search for a file called 192.168.1.1.

CompTIA A+ Core 2 Question D-61

Emily, an end-user, reports to Peter, a helpdesk technician, that her computer has been redirecting her browser to unknown websites when clicking on search results. Peter runs a malware scan and finds that her computer is infected with malware. Peter uses the anti- malware program to remove the infection but Emily reports that the problem resurfaced the next day. Peter runs the malware scan again and finds the same malware is still infecting Emily’s computer. Peter runs several passes of the malware scan to remove the infection but it keeps recurring. Which of the following would MOST likely aid in removing the infection?

A. Enable Windows User Access Control to ensure the user has proper rights to remove the infected files.
B. Disable Windows firewall as it may be conflicting with the malware scan.
C. Run the malware scan in Windows safe mode.
D. Change the desktops IP address to a different subnet.

Correct Answer: C

CompTIA A+ Core 2 Question D-14

A user has installed a new wireless router and is unable to connect their game console to the manufacturers service. Which of the following should the technician look for FIRST?

A. Ensure the game system has a static IP address.
B. Contact the manufacturer to see if service is available.
C. Ensure the game system has updated firmware.
D. Ensure the correct ports are open.

Correct Answer: D

Explanation:
When you connect a game console to the wireless router, you need to see which ports the console uses to connect to Internet. Open those ports and then connect again. This process solves 80% of game console connectivity problems.

CompTIA A+ Core 2 Question C-82

A new LAN drop has been activated but users report that they are unable to connect to the Internet and are receiving an IP address of 169.254.255.55 from that Windows workstation. Which of the following symptoms has occurred? (Select TWO).

A. DHCP server unavailable
B. IP address assigned by NAT
C. Limited connectivity
D. APIPA address assigned
E. IP conflict detected
F. Statically assigned IP address

Correct Answer: AD

CompTIA A+ Core 2 Question C-72

A user installed a new SOHO router and new wireless NICs to increase their transmission speed from 802.11b to 802.11g with the manufacturer’s default settings. The user lives in an apartment building and is still experiencing slowness to the Internet after the installations. Which of the following is the MOST secure option that a technician could implement to resolve this issue?

A. Hide the SSID
B. Assign static IP addresses
C. Enable MAC filtering
D. Disable the WAN port