1. True or false? The physical layer is only concerned with wired network connections.
- true
- false
Explanation: The correct answer is False. The physical layer provides the means to transport bits over the network whether the network is wired or wireless.
2. True or false? When a frame is encoded by the physical layer, all bits are sent over the media at the same time.
- true
- false
Explanation: The correct answer is False. When encoded, the bits making up a frame are transmitted over the media one at a time.
3. The physical layer of the receiving device passes bits up to which higher level layer?
- application
- presentation
- network
- data link
Explanation: The physical layer receives frames from the data-link layer and converts it to bits for transmission. On the sending device the physical layer passes the transmitted bits up to the data link layer as a complete frame.
4. What PDU is received by the physical layer for encoding and transmission?
- frame
- segment
- packet
Explanation: The physical layer receives frames from the data link layer for encoding and transmission.