Computer Networks_Unit2_IP

Computer Networks_Unit2_IP - Computer Networks Unit 2...

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Computer Networks Unit 2 Individual Project Kregg M. Soltow January 11, 2010 American Intercontinental University Ethernet A diagram of an Ethernet packet (frame): Describe the frame format of a typical Ethernet packet and the significance of each field: The frame format of a typical Ethernet packet is made up of 7 portions. These portions are described as follows. The Preamble, which contains seven bytes with the identical pattern of ones and zeros, this sequence of bytes are the first to be transmitted. The Start Frame Delimiter, is the 1-byte pattern with it’s least significant bit set high to (1). The Destination Address, is the destination or MAC Address of the station that is to accept the frame. Every Ethernet device contains a unique 48 bit MAC address assigned by the manufacturer. The source address, the MAC address of the source transmitting the frame. The length field, which indicates the number of bytes in the data field. The data, this is where all the data from the upper layers is carried. And the Frame Check Sequence, which is a 32 bit cyclic redundancy check value used to validate the received Ethernet frame.(Antonakos, James,2009) 72 to 1526 Bytes Preamble Frame Start Pattern Destinatio n Address Source Address Type Field Data Frame Check Sequence 46 to 1500 Bytes
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Computer Networks_Unit2_IP - Computer Networks Unit 2...

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