Which of the following IEEE 802.3 Ethernet Header and Trailer Fields allows devices on the network to easily synchronize their receiver clocks?

(A) Frame Check Sequence
(B) Data and Pad
(C) Start Frame Delimiter
(D) Preamble

Answer:

Preamble is the correct answer.
Preamble: Allow devices on the network to easily synchronize their receiver clocks. Frame Check Sequence
(FCS): Provides a method for the receiving NIC to determine whether the frame experienced transmission errors. Data and Pad: Holds data from a higher layer, typically an L3PDU
(usually an IPv4 or IPv6 packet). The sender adds padding to meet the minimum length requirement for this field. Start Frame Delimiter
(SFD): Signifies that the next byte begins the Destination MAC Address field.