Which field in an Ethernet data frame determines the upper layer protocol of a network device?

Which field in an Ethernet data frame determines the upper layer protocol of a network device?

Ethernet II framing (also known as DIX Ethernet, named after DEC, Intel and Xerox, the major participants in its design), defines the two-octet EtherType field in an Ethernet frame, preceded by destination and source MAC addresses, that identifies an upper layer protocol encapsulated by the frame data.

What are in the Ethernet header?

Ethernet header contains five fields; Preamble, SFD, Destination, Source, and Type.

What is payload in Ethernet frame?

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). However, a jumbo frame, with an MTU size of 9,000 bytes, can also be configured.

Which field would not be found in an Ethernet frame?

Although length field is missing in Ethernet II frame, the frame length is known by virtue of the frame being accepted by the network interface. Practicing the following questions will help you test your knowledge.

How long is an Ethernet header?

14 bytes
The length of the Ethernet header is static at 14 bytes, so we know that 00 is the last byte of the header.

What is the maximum payload size of Ethernet frame?

To recap, Ethernet has a minimum frame size of 64 bytes, comprising an 18-byte header and a payload of 46 bytes. It also has a maximum frame size of 1518 bytes, in which case the payload is 1500 bytes.

What is the use of start frame delimiter field?

Preamble and Start Frame Delimiter Fields: The Preamble (7 bytes) and Start Frame Delimiter (SFD), also called the Start of Frame (1 byte), fields are used for synchronization between the sending and receiving devices. These first eight bytes of the frame are used to get the attention of the receiving nodes.

What is the physical layer of the Ethernet network?

Ethernet physical layer. The Ethernet physical layer is the physical layer functionality of the Ethernet family of computer network standards.

What is the hexadecimal value for the upper layer protocol?

[Note: this is an important question, and one that students sometimes get wrong. Re-read pages 468-469 in the text and make sure you understand the answer here.] 3. Give the hexadecimal value for the two-byte Frame type field. What upper layer protocol does this correspond to?

What are upper layer functions in Ethernet driver?

Upper layer functions are called by drivers to deliver received packets or transmission completion status back up into the network stack. These functions are defined by the hardware independent upper layers of the networking driver support.

What is the hex value for Ethernet frame?

Give the hexadecimal value for the two-byte Ethernet Frame type field. What upper layer protocol does this correspond to? The hex value for the type frame is 0x0806, which corresponds to ARP. 12.