ACMT Networking & Connectivity

Question 1

A customer's MacBook cannot connect to Wi-Fi after a logic board replacement. What should the technician check first?

Accepted Answer

Verify the Wi-Fi antenna cables are reconnected to the AirPort card on the logic board

Answer

Wi-Fi antenna cables are frequently disconnected during logic board replacement; reattaching them is the first step when Wi-Fi fails after such a repair.

Question 2

Which tool in macOS provides detailed diagnostic information about Wi-Fi signal strength, noise, and channel?

Accepted Answer

Wireless Diagnostics (Option + click Wi-Fi menu icon)

Answer

Option-clicking the Wi-Fi menu icon provides signal strength and channel info; opening Wireless Diagnostics gives a full suite of Wi-Fi analysis tools.

Question 3

A Mac is connected via Ethernet but cannot reach the internet. The network shows 'Self-Assigned IP.' What does this indicate?

Accepted Answer

The Mac failed to obtain an IP address from the DHCP server, so it assigned itself a 169.254.x.x address

Answer

A 169.254.x.x self-assigned IP (APIPA) indicates DHCP failure; the Mac could not reach the DHCP server, so it assigned itself a link-local address that does not route to the internet.

Question 4

Which command-line tool in macOS Terminal tests basic network connectivity by sending ICMP echo requests?

Accepted Answer

ping

Answer

'ping' sends ICMP echo requests to a target host and reports round-trip time and packet loss, making it the fundamental tool for testing basic network reachability.

Question 5

A MacBook Pro with Thunderbolt 3 does not recognize a connected Thunderbolt 3 external drive. What should the technician try first?

Accepted Answer

Try a different Thunderbolt 3 cable and a different Thunderbolt port on the Mac

Answer

Thunderbolt cables and ports can be faulty; testing with a different certified Thunderbolt 3 cable and an alternate port is the first non-invasive step.

ACMT - Apple Certified Macintosh Technician Practice Test

ACMT - Apple Certified Macintosh Technician Practice Test

ACMT Networking & Connectivity