CompTIA Network+ Question A-29

A network engineer is dispatched to an employee office to troubleshoot an issue with the employee’s laptop. The employee is unable to connect to local and remote resources. The network engineer flips the laptop’s wireless switch on to resolve the issue. At which of the following layers of the OSI model was the issue resolved?

A. Layer 1
B. Layer 2
C. Layer 3
D. Layer 4
E. Layer 7

Correct Answer: A

Explanation:
The bottom layer of the OSI reference model is Layer 1, the physical layer.
The physical layer is the layer that defines the hardware elements of a network. These elements include:
Network Interface Cards
Network topology Network cabling
The type of signals used for data transmittions
In this question, the network engineer flipped the laptop’s wireless switch on to resolve the issue. The laptop was unable to connect to the wireless network because the wireless network interface card was switched off. Switching the wireless network interface card on enabled the laptop to connect to the wireless network. The wireless network interface card is a physical layer device.

CompTIA A+ Core 2 Question H-89

A user states that their old notebook loses connectivity to the Internet several times a day at work and at home. The issue started after the wireless card was replaced. Which of the following items is MOST likely causing the issue?

A. The motherboard drivers are not current.
B. The drivers for the NIC need to be updated.
C. The wireless on/off switch is not in the on position.
D. The keyboard is faulty and turns the wireless NIC on and off.

Correct Answer: B

Explanation:
Update the drivers for the network interface card. Sometimes updating drivers solve major problems.