Question

Where is the Start Frame Delimiter (SFD) found in an ethernet frame?

Answer 1

Answer:

The SFD is the eight-bit (one-byte) value that marks the end of the preamble, which is the first field of an Ethernet packet, and indicates the beginning of the Ethernet frame.

Explanation:

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Answer 2

Answer:

The SFD is an eight-bit (one-byte) number that denotes the start of the Ethernet frame and marks the end of the preamble, which is the first field of an Ethernet packet.

Explanation:

• The Start frame delimiter is a single byte, 10101011, which is a frame flag that indicates when a frame begins. Although prior versions of Ethernet used 16 bits, the MAC addresses used in 802.3 are always 48 bits long.

• SFD (start of frame delimiter) is a one-byte field that is always set to 10101011.  SFD indicates that the next bits of the frame, which represent the destination address, is about to start.
• The preamble is frequently referred to as 8 bytes because SFD is sometimes considered a component of PRE.

• A preamble precedes each Ethernet frame, followed by SFD. SFD is an 8-bit (one-byte) pattern that marks the end of the preamble and is the first field in an Ethernet packet, signalling the start of the Ethernet frame. It depicts or symbolizes the start of a transmission frame. It foreshadows the arrival of a new frame.