1.8 In a client/ server system, a client transmits a request to a server, the server performs a processing operation, and the server returns a result. Describe the possible things that can go wrong with transmission in this scenario.
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1.8 In a client/ server system, a client transmits a request to a server, the server
performs a processing operation, and the server returns a result. Describe the
possible things that can go wrong with transmission in this scenario.
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- Computer science Use C language to solve the question. The initial server and client .c code is given write code using these .c client and server files. Q1: Design a client-server model for two-way communication. Both the client and server should beable to send and receive messages.Upon the establishment of successful connection, the server should send a message, “Hi, youhave connected to the server!”.[The client should then send a string to the server. The server should reverse the string andsend it back to the client. The client should then display the received string.] This job will bedone in a loop of 5 times. -------------------------------------------- server.c #include <stdio.h> #include <stdlib.h> #include <sys/socket.h> #include <sys/types.h> #include <netinet/in.h> int main() { char server_message[256] = "Hi, Yes you have reached the server!"; char buf[200]; // create the server socket int server_socket; server_socket = socket(AF_INET,…Write a system program in C that implements the client server communication using named pipes. A client is expected to close the channel and kill itself when the character '$' is received. Similarly, the server is expected to close the channel and kill all the clients when character '*' is received.Can someone help me with the following, it's revision for an exam I'm doing. If your explaining it could you please provide detailed steps of why you did what you did so I know how to do it if it comes up in the real thing! Thank you so much! :) An IT administrator is interested in studying server traffic. He believes that the time (inminutes) between requests being sent to a server can be well modelled using a Weibulldistribution with parameters α = 2 and β = 1 b) The median arrival time is defined to be the time for which the probability of beingless than this value is 0.5. Calculate the median time between requests
- Q.7. Design and implement a client/ Multi-threaded Server Chat application where a set of clients are able to send their request to the Multithreaded Server. In this application, messages that are exchanged between client and server, must be encrypted using AES encryption algorithm. After receiving the message, each party (client or server) perform decryption operation and show the content of message on the terminal.HTTP/2 versus HTTP/1.1: object download delays. Consider a client and a server, separated by an RTT of 4 time units. The client makes a request for 4 objects at t=0. O1 consists of 10 frames, 02 and 04 each consist of 1 frame, and 03 consists of 2 frames. In the HTTP/2 example shown below, the server is transmitting frames to the client in the order 01, 02, 03, 04 (as long as there are frames of type i to transmit, and when not the server just moves on to a frame from object i+1 mod 4). Each frame takes 1 time unit to transmit. server GET O4 GET 03 GET O2 GET 01 object data requested client O4 O2 Оз Under HTTP 1.1 (not shown below), the server would send 01, 02, 03, O4 in that first-come-first-served (FCFS) order, sending each object in its entirety before moving on to send the next object in that order. Let's define the object download delay as the time from when an object is requested (at t=0 below) to the time that object is received in its entirety. What is the average object…Q2.Recently QUIC protocol is suggested. a. Elaborate on the advantages of QUIC through an example scenario. b. The standard protocols, like TCP, UDP and HTTP, are implemented in various languages. For example, Java language has ServerSocket() class for TCP server. Does the QUIC protocol is supported in any language? I mean its library is available. If yes, please explain its working. And run a simple QUIC client program, even if this program is available over the Internet. c. List the servers supporting QUIC protocol, if they exist.
- One of the problems with the Internet email system is that sending forged emails is relatively straightforward, i.e., it is easy to send an email with a fake sender/from address. One solution to this problem would be for a domain’s mail servers to digitally sign any email originating from the domain. For this to be useful, the public key would need to be made available to clients to validate the signatures. It is proposed that the public keys of the mail servers will be verified and signed by a certification authority (same as SSL/TLS certificates) and distributed via a standardised URL for the domain, e.g., https://mybusiness.com/email.pubkey. (a) Explain how the client would obtain the public key and validate the email server’s digital signatures. (b) Discuss the problem of trusting the obtained public key and how this solution results in public keys that can/cannot be trusted. (c) Indicate whether you believe this approach could be used to prevent forged emails and explain why it…3. Suppose that you have written a time server, which periodically notifies its clients of the current date and time. Write an interface that the server could use to enforce a particular protocol on its clients.Computer Science C programming Develop a proxy HTTP server that can accept HTTP requests from clients and convert them to HTTPS request to the web server. The HTTP request can be filtered based on an access control list. The requests can be generated by any web client, such as the curl command or a web browser. the proxy converts plain text HTTP requests from a client to HTTPS requests and then returns the responses to the client. Main objective is to create a proxy HTTP server that converts cleartext HTTP requests from clients to HTTPS requests to servers and vice versa for the responsesresponses.
- 3. Consider the M/M/1 queue discussed in class. Assume that packets arrive to a queue with average arrival rate A [pkts/s]. The average service rate of the queue is denoted by u [pkts/s]. (a) Write expressions for: (i) the mean time between packet arrivals to the queue, i.e., the average inter-arrival time; and (ii) the mean service time, i.e., the average time needed to transmit a packet onto the outgoing link. (b) Let N denote the number of packets in the system in steady-state. Suppose A = 850 and u 1000. Find the smallest value of B such that P(N > B) < e = 10¬4. Hint: Use MATLAB or some other computational tool (you could even use an Excel spreadsheet) to test different values of B. 4. Consider the M/M/1 queue from Problem 3. (a) Find an expression for E[N], i.e., the average number of packets in the system in steady- state. For the values of A and µ specified in Problem 4(b), compute the value of E[N]. What happens when A→ µ? (b) Find an expression for Var[N], i.e., the variance…3. Consider the M/M/1 queue discussed in class. Assume that packets arrive to a queue with average arrival rate A [pkts/s]. The average service rate of the queue is denoted by u [pkts/s]. (a) Write expressions for: (i) the mean time between packet arrivals to the queue, i.e., the average inter-arrival time; and (ii) the mean service time, i.e., the average time needed to transmit a packet onto the outgoing link. (b) Let N denote the number of packets in the system in steady-state. Suppose A and u = 850 %3D 1000. Find the smallest value of B such that P(N > B) < € = 10-4. Hint: Use MATLAB or some other computational tool (you could even use an Excel spreadsheet) to test different values of B.Develop a simulation program to simulate an 8-port Ethernet switch. The switch initially has no knowledge about the hosts connected to each port. It learns frame addresses and stores-and- forwards the frames. The input text file "in.txt" contains information of the incoming frames, one frame per line. There are 4 pieces of data per line: frame ID, arrival port, frame source address, and frame destination address. The frames arrive at the switch in the order of which they appear in the input file. Destination address "X" indicates a broadcast frame. The output text file "out.txt" has 8 lines. Each line lists all the frames departing from each port, here is an example: "in.txt" contains 5 incoming frames: F1 P2 B--A F2 P6 D--C F3 P5 E--B F4 P7 F--D F5 P6 D--X "out.txt" should list the departing frames on each port: P1: F1 F2 F5 P2: F2 F3 F5 P3: F1 F2 F5 P4: F1 F2 F5 P5: F1 F2 F5 P6: F1 F4 P7: F1 F2 F5 P8: F1 F2 F5 I