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Discuss about the difference between go-back-n ARQ and Selective Repeat ARQ?

Shakeingheart ∙

Lvl 1

∙ 14y ago

Updated: 11/7/2022

Go-Back-N ARQ

Retransmission begins with the last unacknowledged frame even if subsequent frames have arrived correctly .duplicate frames are discarded.

Go-back-n ARQ -- Receiver must get Frames in correct order

Selective Repeat ARQ

Only the unacknowledged frame is retransmitted.

It may be (slightly) more efficient than Go-back-n ARQ, but also much more complicated.

Selective repeat ARQ -- correctly-received out-of-order Frames are stored at Receiver until they can be re-assembled into correct order

Hamida Almangush

Wiki User

∙ 14y ago

What else can I help you with?

How do you implement 1 bit sliding window protocol progamme in c?

server side: #include<sys/types.h> #include<netinet/in.h> #include<arpa/inet.h> #define SIZE 4 main() { int std, lfd, len, i, j, status, sport; char str[20], frame[20], temp[20], ack[20]; struct sockaddr_in saddr, caddr; printf("Enter the port address"); scanf("%d", &sport); std = socket(AF_INET, SOCK_STREAM, 0); if(std<0) perror("Error"); bzero(&saddr, sizeof(saddr)); saddr.sin_family = AF_INET; saddr.sin_addr.s_addr = htonl(INADDR_ANY); saddr.sin_port = htons(sport); lfd = bind(std, (struct sockaddr *)&saddr, sizeof(saddr)); if(lfd) perror("Bind Error"); listen(std, 5); len = sizeof(&caddr); lfd = accept(std, (struct sockaddr *)&caddr, &len); printf("Enter the text:"); scanf("%s", str);i = 0; while(i<strlen(str)) { memset(frame, 0, 20); strncpy(frame, str+i, SIZE); printf("\nTransmitting frames:"); len = strlen(frame); for(j=0; j<len; j++) { printf("%d", i+j); sprintf(temp, "%d", i+j); strcat(frame, temp); } write(lfd, frame, sizeof(frame)); read(lfd, ack, 20); sscanf(ack, "%d", &status); if(status 0)write(std, "-1", sizeof("-1")); else{printf("Enter the sequence no of the frame where error has occured"); scanf("%s", err); write(std, err, sizeof(err)); read(std, str, 20); printf("Received the transmitted frame: %s\n", str); } } close(std); }

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