What are the 6 parts of an Ethernet frame?

Ethernet frame

• Preamble – informs the receiving system that a frame is starting and enables synchronisation.
• SFD (Start Frame Delimiter) – signifies that the Destination MAC Address field begins with the next byte.
• Destination MAC – identifies the receiving system.
• Source MAC – identifies the sending system.

What is Type field in Ethernet frame?

EtherType is a two-octet field in an Ethernet frame. It is used to indicate which protocol is encapsulated in the payload of the frame and is used at the receiving end by the data link layer to determine how the payload is processed. EtherType values are assigned by the IEEE Registration Authority.

What is the start frame delimiter in Ethernet frame?

10101011
Explanation: The start frame delimiter is a 1 byte field in the Ethernet frame that indicates that the preceding bits are the start of the frame. It is always set to 10101011.

What is Ethernet frame size?

The standard Ethernet (IEEE 802.3) frame size is 1,518 bytes. The frame size of a standard Ethernet frame (defined by RFC 894) is the sum of the Ethernet header (14 bytes), the payload (IP packet, usually 1,500 bytes), and the Frame Check Sequence (FCS) field (4 bytes).

Can you explain frame format of Ethernet?

Ethernet frame starts with Preamble and SFD, both works at the physical layer. Ethernet header contains both Source and Destination MAC address, after which the payload of the frame is present. The last field is CRC which is used to detect the error.

What is the frame type field?

The type field allows to recognize the many protocols that may go over Ethernet, be it IPv4, ARP, IPv6, IPX, AppleTalk, and so on. The different frame types have different formats and MTU values, but can coexist on the same physical medium.

What is Preamble in Ethernet frame?

Cable Networking Protocols A frame holds one packet of data. The first 8 bytes are the preamble. Some Ethernet systems don’t transmit continuously, so the preamble is used to synchronize a receive clock before data is transmitted.

What is delimiter frame?

An Ethernet frame is preceded by a preamble and start frame delimiter (SFD), which are both part of the Ethernet packet at the physical layer. The frame ends with a frame check sequence (FCS), which is a 32-bit cyclic redundancy check used to detect any in-transit corruption of data.

What are the two sizes of an Ethernet frame?

What are the two sizes (minimum and maximum) of an Ethernet frame? (Choose two.) Answers Explanation & Hints: The minimum Ethernet frame is 64 bytes. The maximum Ethernet frame is 1518 bytes.

Why are Ethernet frames 64 bytes?

These frame sizes were set based on the physical characteristics of early Ethernet (10base5) media. Based on the maximum permitted cable plant size, 64 bytes of data would provide enough time for the data to span the entire half-duplex cable plant and ensure a reliable collision detection.