Final answer:
The manchester-encoded preamble of the IEEE 802.3 MAC frame produces a specific signal pattern on the medium, ensuring synchronization and aiding in the detection of the frame's beginning.
Step-by-step explanation:
The manchester-encoded preamble of the IEEE 802.3 MAC frame produces a specific signal pattern on the medium. During the preamble, each bit is transmitted as two consecutive symbols, with the first symbol representing a logical '0' and the second symbol representing a logical '1'.
This pattern ensures synchronization and helps receivers detect the beginning of the frame. For example, a '1' bit is represented by a transition from low to high, while a '0' bit is represented by a transition from high to low. The preamble signal pattern allows for accurate data transmission and reception in Ethernet networks.