Discuss the advantages and the disadvantages of using a fixed value for the retransmission timer.
1. In order to be able retransmit lost packets, TFTP must keep a copy of the data it sends. How many packets of data must TFTP keep at a time to implement this retransmission mechanism? 2. TFTP, like most protocols, will never send an error packet in response to an error packet it receives.Why? […]
o complete the coding for the client and then run the server program in one command window and the client program in each of two further command windows (so that there are two clients communicating with the server at the same time).
This exercise converts the above files into a simple email server and email client respectively. The server conversion has been done for you and is contained in file EmailServer.java, a printed version of which appears on the following pages for ease of reference. Some of the code for the client has also been provided for […]
Examine this code and make the necessary additions in the places indicated by the commented lines.
1.If you haven’t already done so, compile and run the server program DayTimeServer and its associated client, GetRemoteTime, from Section 2.3. 2.4 Program Echo is similar to program TCPEchoClient from Section 2.2.1, but has a GUI front-end similar to that of program GetRemoteTime from Section 2. It provides an implementation of the echo protocol (on port 7). This implementation sends one-line messages to a […]
Implement the same electronic chatroom application that you did for exercise
1.Implement the same electronic chatroom application that you did for exercise 2. above, but this time using Java's non-blocking I/O on the server. You may very well be able to make use of your original client program, but have the client close its socket only after it has received (and displayed) its own 'Bye' […]
write a Java program that uses a while loop to read values from the above text file and displays then in a table under the headings
1. Using a text editor or wordprocessor, create a text file holding a series of surnames and payroll numbers (at least five of each). For example: Smith 123456 Jones 987654 Jenkins 555555 … … Now write a Java program that uses a while loop to read values from the above text file and displays then in […]