Which of the following DNS records displays the destination of incoming email on a domain?
A. CNAME
B. TXT
C. MX
D. AAAA
Show Answer
Correct Answer: C
Explanation: An MX (Mail Exchanger) record specifies the mail server(s) responsible for receiving incoming email for a domain. CNAME creates an alias, TXT stores arbitrary text (often used for SPF/DKIM/verification), and AAAA maps a hostname to an IPv6 address.
Question 56
A user's laptop is projecting an image upside down while using a ceiling-mounted projector. Which of the following should a technician do to best solve this issue?
A. Change the input source.
B. Rotate the image from the laptop.
C. Adjust the display frequency.
D. Flip the image vertically from the projector.
Show Answer
Correct Answer: D
Explanation: A ceiling-mounted projector is typically inverted, so enable its vertical image flip or ceiling-mount setting to display the image right-side up. Changing the input source or display frequency will not correct the orientation.
Question 57
A company purchases a new printer for an international office. When a technician installs the printer, the display only shows a white screen. Which of the following should the technician do to troubleshoot the issue?
A. Check network port connectivity.
B. Verify the printer's power requirements.
C. Ensure the printer is in the correct organizational unit.
D. Upgrade the printer's firmware.
Show Answer
Correct Answer: B
Explanation: A white screen during initial installation indicates a hardware startup issue rather than a network, directory, or management problem. The key clue is that the printer is being installed in an international office, where mains voltage and power standards may differ by region. Verifying that the printer matches the local power requirements (or is correctly configured for the local voltage) is the appropriate first troubleshooting step. Firmware upgrades require a functioning device, and network connectivity or organizational units would not cause a blank display.
Question 57
Which of the following DNS records is used by DMARC to verify the authenticity of email servers?
A. MX
B. CNAME
C. TXT
D. A
Show Answer
Correct Answer: C
Explanation: DMARC policies are published in DNS TXT records, which receiving mail servers look up to determine how to evaluate email authentication and handle messages that fail checks.
Question 58
Which of the following devices forwards traffic based on MAC addresses?
A. Switch
B. Router
C. Firewall
D. Gateway
Show Answer
Correct Answer: A
Explanation: A switch forwards Ethernet frames based on MAC addresses using its MAC (CAM) address table. Routers forward traffic based on IP addresses, while firewalls filter traffic according to security rules and gateways connect dissimilar networks or protocols.
Question 58
An employee tries to use a projector to share a slideshow from a laptop. The projector displays the message No video signal from source device. A technician verifies that all cables are properly connected. Which of the following steps will most likely resolve this issue?
A. Changing the input
B. Using a different computer
C. Power cycling the laptop
D. Putting the slideshow on a USB
Show Answer
Correct Answer: A
Explanation: If the cables are connected but the projector shows “No video signal,” it may be listening to the wrong input. Select the input that matches the laptop’s connection, such as the correct HDMI port.
Question 59
A developer wants to ensure that their critical data is protected from a hard drive failure. Their workstation has two hard drives. Which of the following should the developer use for their workstation?
A. RAID 0
B. RAID 1
C. RAID 5
D. RAID 10
Show Answer
Correct Answer: B
Explanation: RAID 1 mirrors data across two drives, providing redundancy so the system can tolerate a single drive failure without data loss. RAID 0 provides no redundancy, RAID 5 requires at least three drives, and RAID 10 requires at least four drives.
Question 59
Which of the following records allow a user to navigate to a server by using a memorable title instead of an IPv4 address? (Choose two.)
A. SPF
B. AAAA
C. CNAME
D. TXT
E. MX
F. A
Show Answer
Correct Answer: C, F
Explanation: A CNAME record lets a memorable hostname act as an alias for another hostname. An A record maps a hostname to an IPv4 address, allowing users to reach the server by name instead of entering its address.
Question 60
A user's wireless headset shows a "connected" status when turned on, but the Bluetooth list on the user's phone shows that the headset is "not connected." Which of the following should the technician do?
A. Enter the PIN.
B. Turn off Wi-Fi.
C. Re-pair the devices.
D. Enable Bluetooth.
Show Answer
Correct Answer: C
Explanation: If the headset indicates it is connected but the phone shows it is not connected, the pairing relationship is likely stale or corrupted. Re-pairing the devices is the standard troubleshooting step. Entering a PIN is only needed during pairing if prompted, Wi-Fi does not affect Bluetooth pairing in this scenario, and Bluetooth is already enabled since the phone can detect the headset.
Question 60
Which of the following should a technician check when the display of a computer is flickering?
A. LCD type
B. Refresh rate
C. Screen resolution
D. Pixel density
Show Answer
Correct Answer: B
Explanation: An incorrect or unsupported refresh rate can cause a display to flicker, so the technician should check the refresh rate.
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