DCCNLab5 - E EE346, EEE314: Data Communication &...

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EEE346, EEE314: Data Communication & Computer Networks : Instructor: Shahzad Malik/Suffian Shiekh/ Zafar Hadier Lab Coordinator: Shoieb Arshad LAB # 05 Introduction to Ethernet frame: Purpose: The lab is intended to familiarize the students with a Media Access Control (MAC) Frame. At the end of the lab the student must know: The Data Encapsulation. The Data De-Encapsulation. Ethernet frame format. IP Packet header TCP Packet Header UDP Packet Header COMSATS Institute of Information Technology 1 | P a g e Permanent Campus, Chak-Shahzad, Islamabad Department of Electrical Engineering
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EEE346, EEE314: Data Communication & Computer Networks COMSATS Institute of Information Technology 2 | P a g e Permanent Campus, Chak-Shahzad, Islamabad Department of Electrical Engineering
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EEE346, EEE314: Data Communication & Computer Networks The header fields are discussed below: Version (always set to the value 4, which is the current version of IP) IP Header Length (number of 32-bit words forming the header, usually five) Type of Service , now known as Differentiated Services Code Point (DSCP) (usually set to 0, but may indicate particular Quality of Service needs from the network, the DSCP defines one of a set of class of service) Size of Datagram (in bytes, this is the combined length of the header and the data) Identification (16-bit number which together with the source address uniquely identifies this packet - used during reassembly of fragmented datagrams) Flags (a sequence of three flags (one of the 4 bits is unused) used to control whether routers are allowed to fragment a packet (i.e. the Don't Fragment, DF, flag), and to indicate the parts of a packet to the receiver) Fragmentation Offset (a byte count from the start of the original sent packet, set by any router which performs IP router fragmentation)
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DCCNLab5 - E EE346, EEE314: Data Communication &...

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