ACSP Network Services Management 5 — Questions and Answers
Question 1: A Mac fails to obtain an IP address via DHCP over Ethernet but works fine on Wi-Fi on the same network. What should be checked first?
- DHCP lease time settings on the router
- The Ethernet cable and physical connection (Correct answer)
- The Mac's firewall blocking DHCP
- DNS server configuration
Correct answer: The Ethernet cable and physical connection
A physical layer issue such as a faulty cable or unplugged connection is the most common reason Ethernet fails when Wi-Fi on the same network succeeds.
Question 2: Which macOS System Settings panel allows a user to create and switch between different network configurations for different environments?
- Network Locations (Correct answer)
- VPN Profiles
- Network Extensions
- Sharing Profiles
Correct answer: Network Locations
Network Locations in macOS allow users to save and switch between sets of network configurations for different environments such as home and office.
Question 3: A user needs to share their Mac's Wi-Fi connection over Ethernet to a device that doesn't support Wi-Fi. Which macOS feature enables this?
- AirDrop
- Internet Sharing (Correct answer)
- Handoff
- Personal Hotspot
Correct answer: Internet Sharing
Internet Sharing in macOS allows sharing an active internet connection from one interface (Wi-Fi) to another (Ethernet) to connected devices.
Question 4: When a Mac is connected to a corporate network via VPN, what does 'Send all traffic over VPN connection' accomplish?
- It encrypts only web browser traffic
- It routes all network traffic through the VPN tunnel (Correct answer)
- It disables split tunneling for DNS only
- It forces IPv6 to use the VPN gateway
Correct answer: It routes all network traffic through the VPN tunnel
Enabling 'Send all traffic over VPN connection' forces all network traffic—not just corporate traffic—through the VPN tunnel.
Question 5: A Mac's Wi-Fi connection drops repeatedly in an office with many networks. Which tool in macOS can help identify channel congestion?
- Network Diagnostics
- Wireless Diagnostics (Correct answer)
- Console
- Activity Monitor
Correct answer: Wireless Diagnostics
Wireless Diagnostics (hold Option and click the Wi-Fi menu icon) includes a scan feature that shows nearby networks, their channels, and signal strength.
Question 6: Which command shows the current ARP table on a Mac, mapping IP addresses to MAC addresses on the local network?
- netstat -r
- arp -a (Correct answer)
- ifconfig -arp
- route -n get
Correct answer: arp -a
The 'arp -a' command displays the ARP cache, showing the mapping of IP addresses to hardware (MAC) addresses discovered on the local network.
Question 7: A Mac running macOS Ventura or later cannot connect to a legacy 802.1X enterprise Wi-Fi network after upgrading. What is the recommended first troubleshooting step?
- Reinstall macOS from Recovery
- Remove and re-add the network configuration profile (Correct answer)
- Disable IPv6 on the Wi-Fi interface
- Reset NVRAM and SMC
Correct answer: Remove and re-add the network configuration profile
After a macOS upgrade, outdated or conflicting configuration profiles for 802.1X networks should be removed and re-deployed to restore enterprise Wi-Fi connectivity.
ACSP Network Services Management 5
A Mac fails to obtain an IP address via DHCP over Ethernet but works fine on Wi-Fi on the same network.
What should be checked first?