A computer is unable to access the network. When you check the LED lights near the
computer’s network port, you discover the lights are not lit. Which layer of the OSI
model are you using to troubleshoot this problem? At which two layers does the
network adapter work?
To troubleshoot the issue with the computer's network connectivity, you are using the physical layer of the OSI model. The physical layer is responsible for the transmission and reception of unstructured raw data over a physical medium.
The network adapter works at two layers of the OSI model:
1. Physical Layer: The network adapter transmits and receives electrical signals over the physical medium, such as Ethernet cables or wireless signals.
2. Data Link Layer: The network adapter also performs functions related to the data link layer, such as encapsulating data into frames, error detection, and flow control. It interacts with the MAC (Media Access Control) sublayer of the data link layer to handle addressing and access to the physical medium.
When troubleshooting a computer's inability to access the network due to the lights near the network port not being lit, you are primarily working at the physical layer of the OSI model. The physical layer deals with the actual physical transmission of data over the network, including the network cables, connectors, and network interface card (NIC) or network adapter.
The network adapter, which is responsible for connecting the computer to the network, works at both the physical layer and the data link layer of the OSI model. The physical layer handles the physical transmission of data, while the data link layer deals with addressing and error detection, ensuring reliable transmission over the physical layer.
Therefore, troubleshooting the issue at hand involves checking the physical connection, such as ensuring the network cable is securely plugged in and functioning, as well as checking for any issues with the network adapter itself.