A user has connected a PC to a portable projector, but video does not appear on the screen when the user tests the projector. The user confirms the lens cap was removed from the projector. Which of the following should the user do NEXT?
A. Adjust the keystone settings.
B. Check the video cable.
C. Verify the lamp works.
D. Increase the brightness setting.
Immediately after a small company implemented VoIP telephony, users began reporting dropped calls. Large files and videos are being transferred on the same network as the VoIP phones. Which of the following should the network administrator do to prevent dropped calls? (Choose two.)
A. Implement QoS.
B. Increase MTU.
C. Implement download quotas.
D. Update phone firmware.
E. Move VoIP phone sets to different VLAN.
F. Configure a separate DNS server for the VoIP phones.
Which of the following would be MOST appropriate to use to block an inbound network connection?
A. Managed sigh
B. Access point
C. Router
D. Firewall
Which of the following devices allows administrators to prioritize network traffic based on the protocol type?
A. Bridge
B. Access point
C. Hub
D. Managed switch
A vendor connects a laptop to the projector for a presentation but notices the protector is not listed as a display in the display properties. Which of the following troubleshooting steps should be done FIRST?
A. Ensure the projector is on.
B. Install the projector drivers
C. Update the graphics drivers
D. Verify laptop compatibility
A user reports that a small part of a laptop's screen displays black instead of the appropriate color. A technician changes the display settings on the user's laptop and then runs onboard diagnostics; however, the issue is still not resolved. Which of the following should the technician perform NEXT?
A. Update the video driver.
B. Replace the digitizer.
C. Test for dead pixels.
D. Check for recent updates.
Which of the following requirements is MOST important to evaluate when setting up a virtual desktop on a user's workstation?
A. Network
B. Emulator
C. Security
D. Resources
Which of the following server roles would be used to host mapped drives on a corporate network?
A. Webserver
B. File server
C. DNS server
D. Mail server
A user's smartphone has been experiencing performance issues, and it needs to be charged more often. A technician also notices there have been spikes in the smartphone's CPU and memory usage. Which of the following would MOST likely help to improve the performance of the smartphone?
A. Configuring automatic updates
B. Conditioning the battery
C. Disabling unnecessary services
D. Turning off cellular roaming
Which of the following cloud computing concepts is used to describe online providers that serve multiple clients with scalable services, such as access to a large number of CPUs and memory from multiple resources?
A. Rapid elasticity
B. Measured service
C. Cloud file-storage service
D. Resource pooling
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