An upper-layer packet is split into 10 frames, each of which has an 80 percent chance of arriving undamaged. If no error control is done by the data link protocol, how many times must the message be sent on average to get the entire thing through?
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- Write a program to create a new key pair, and then use the new key pair to launch an EC2 instance, which has 20GB EBS attached, and allows public http request.I am using SwaggerHub for API documentation for my web application. When I use the bearer token for authentication, and I run a get request that is supposed to return a JSON of the user's trip information. It returns a 200 HTTP response, but the body response does not return the JSON information, instead it returns HTML text. The image below shows the result. Why is this happening?Suppose an HTTP client makes a first GET request to the gaia.cs.umass.edu web server for a base page that it has never before requested, which contains an embedded object, which causes the client to make a second GET request. A very short time later, the client then makes a third GET request - for the same base page, with that third GET request having an If-Modified-Since field (as does the 4th GET request that the client makes for the embedded object). Neither the base object nor the jpeg object has changed. How many round trip times (RTTs) are needed from when the client first makes the third GET request (i.e., when it requests the base object for the second time) to when the base page and the jpeg file are displayed a second time, assuming that: any time needed by the server to transmit the base file, or the jpeg file into the server's link is (each) equal to 1/2 RTT the time needed to transmit an HTTP GET into the client's link is zero? the time needed by the server to transmit…
- The URL Connection class can be used to read and write data: Select one: a.To the specified resource referred by the HttpResponse and the URL b.To the specified resource referred by the URL c.To the specified resource referred by the HttpServer and the URL d.To the specified resource referred by the ServerSocket and the URLThe WebSocket protocol provides a way to exchange data between browser and server via persistent connection. Once the socket is created, there are events following that. Analyze all the FOUR (4) events and provide a code snippet of every event.A ________ bridge can forward and filter frames and automatically build its forwarding table. a. simple b. dual c. transparent d. none of the above
- The problem below involves the UDP protocol.DescriptionClientSend an integer in the range 0 to 100 representing a student’s score in COMP2602 to the server.Use a loop to send five score to the server in all. Each score is sent one at a time so that theserver can respond to each score sent.ServerThe server receives each integer score from the client and returns the letter grade for that score tothe client where it is printed. Note: THE GRADE IS PRINTED AT THE CLIENT.Grade scheme 0-49 F, 50-70 C, 71-80 B, 81-100 AYou may use any reasonable IP addresses and port numbers in your program.Notes: Name the client client.py and the server server.pyWrite a Console java program named SimpleUdpServer that demonstrates the basic components of a simple UDP server by binding a dedicated socket on the server for other UDP clients to connect to. solve it without paperTake a look at two real-world HTTP response codes on the MIT website, for instance, and consider how they relate to the HTTP commands they are linked with (s).
- An instance of ServerSocket listens for TCP connection requests and creates a new Socket instance to handle each incoming connection. Select one: True FalseQUESTION 21 It is possible for two UDP segments to be sent from the same socket with source port 5723 at a server to two different clients. True False QUESTION 22 The acronym API in this textbook stands for “Application programming interface”. True FalseModify the following code to send one maximum-size UDP datagram, read it back, and print the number of bytes returned by recvfrom. #include "unp.h" voiddg_cli(FILE *fp, int sockfd, const SA *pservaddr, socklen_t servlen){ int n; char sendline[MAXLINE], recvline[MAXLINE + 1]; while (Fgets(sendline, MAXLINE, fp) != NULL) { Sendto(sockfd, sendline, strlen(sendline), 0, pservaddr, servlen); n = Recvfrom(sockfd, recvline, MAXLINE, 0, NULL, NULL); recvline[n] = 0; /* null terminate */ Fputs(recvline, stdout); }}