ACSP Troubleshooting and Networking 5

Question 1

After a macOS update, a user's USB-C hub no longer works. You isolate the issue to a specific kernel extension. Which macOS security feature most likely prevented it from loading?

Accepted Answer

System Integrity Protection (SIP)

Answer

System Integrity Protection restricts third-party kernel extensions and requires user approval via System Settings > Privacy & Security before they can load.

Question 2

A shared Mac in a school lab intermittently drops its network connection. After checking cables and the switch port, which macOS log source would you examine first for recurring network interface errors?

Accepted Answer

Console app filtered to 'kernel' messages or /var/log/system.log

Answer

Kernel-level network driver errors are written to the system log; filtering Console by process 'kernel' reveals interface resets, link-down events, and driver faults.

Question 3

What does the 'Renew DHCP Lease' button in System Settings > Network actually do?

Accepted Answer

It releases the current IP lease and requests a new one from the DHCP server

Answer

Renewing the DHCP lease sends a DHCPRELEASE followed by a DHCPDISCOVER, allowing the Mac to get a fresh IP assignment from the DHCP server.

Question 4

A Mac is connected via Ethernet but you notice packets are being dropped. You run 'ping -c 20 8.8.8.8' and see 5% packet loss. Which hardware component should you suspect first?

Accepted Answer

The Ethernet cable or the switch port

Answer

Intermittent packet loss on a wired connection most commonly points to a faulty cable, a damaged RJ45 connector, or a failing switch port.

Question 5

Which macOS feature caches software updates and App Store content locally so devices on the same network download from the local cache instead of the internet?

Accepted Answer

Content Caching

Answer

Content Caching, enabled in System Settings > General > Sharing, stores Apple content locally and serves it to nearby devices, reducing WAN bandwidth usage.

ACSP - Apple Certified Support Professional Practice Test

ACSP - Apple Certified Support Professional Practice Test

ACSP Troubleshooting and Networking 5