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In OSI 7 layer model, a header, or possibly a trailer, can be added to the data unit at each layerI 7 layer, but we will define a simple virtual packet which contains only 8bit data value without any header and trailer
Each packet contains one pixel information of the lenna256 image. We defined the 3 structures in "CPacketStruct.h" to express a packet as bit stream. Left structure is defined for bit stream for error detection code and right structure is defined for bit stream for error correction code. There is additional bit stream without any code, and the data structure of bit stream with no code is same as the Packet structure in "CPacketStruct.h"
typedef struct {
BIT dat1[5];
BIT dat2[5];
} EDBitStream;
BIT dat1[7];
BIT dat2[7];
} ECBitStream;
Fig. Bit stream structure
One pixel data is represented with 8 digits, and each 4 digits are divided into dat1, and dat2. In bit streams for error detection
Ex) 1 Pixel data = 100010012
Normal Packet
(Packet is not encoded)
Encoded Packet by Parity Bit
Encoded Packet by hamming code
[1000 1001]
[Pixel Data ]
[10001 10010 ]
[ (1000)+Parity || (1001) +Parity ]
[1101000 0111001 ]
[ (1000)* G || (1001) * G ]
In Packet structure,
NCBitStream
In EDBitStream Structure
In ECBitStream Structure
LRC - Performance Detects every burst errors up to length n (number of columns) If two bits in one data unit are damaged as well as two bits in exactly same positions
DLCI stands for Data Link Connection Identifier. It identifies the local PVC.
Name the layer responsible for putting 1s and 0s into a logical group? Ans) Frames are broken down into 1s and 0s and placed onto the physical medium by the Data Lin layer.
On a lan where are ip datagram transported?
Network Layer The internet network layer is responsible for moving network layer packets known data grams from one host to another. The internet transport layer pro
Interconnection Network An interconnection network is designed for transferring data between two processors in a Multi-stage network. Memory bottleneck is a fundamental limitat
Token Ring Implementation Sequence of 150-ohm shielded twisted-pairs sections Output port on every station connected to input port on the next Frame is passed to
Multicast An identifier for a set of interfaces (typically belonging to dissimilar nodes). A packet sent to a multicast address is delivered to all interfaces identified by tha
Can you define Network Layer?
Programming Based on Message Passing As we know, the programming model based on message passing uses high level programming languages like C/C++ along with a number of message
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