Computer Science · Computer Networks
Case Study: Campus Wi-Fi Name Resolution & Routing Students at Greenfield College report: 'Wi-Fi connects and we can ping an internal IP, but portal.greenfield.edu doesn't open.' The IT desk notices some rooms use an unmanaged switch; others connect through the main router. New laptops join Wi-Fi and start working without manual IP settings. Helpdesk uses ping to test reachability between two subnets. Ping relies on which protocol and layer?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1ARP at Layer 2
- 2HTTP at Layer 7
- 3ICMP at Layer 3✓
- 4TCP at Layer 4
Correct answer
ICMP at Layer 3
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