Which of the following is a common OSI Layer 1 (physical layer) troubleshooting issue? (Choose two.)
A) Bad cables or connectors
B) dB loss
C) Bad module
D) Port configuration
E) VLAN configuration
A, B
Explanation: Bad cable or connectors and dB loss are OSI Layer 1 (physical layer) troubleshooting issues; Bad module, port configuration, and VLAN configuration are OSI Layer 2 (data link layer) troubleshooting issues.
Bad cable or connectors and dB loss are OSI Layer 1 (physical layer) troubleshooting issues; Bad module, port configuration, and VLAN configuration are OSI Layer 2 (data link layer) troubleshooting issues.
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