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Write a client and a server that permit the client to execute arbitrary shell commands on the server host. (If you don't implement any security mechanism in this application, you should ensure that the server is operating under a user account where it can do no damage if invoked by malicious users.) The client should be executed with two command-line argumentAfter connecting to the server, the client sends the given command to the server, and then closes its writing half of the socket using shutdown(), so that the server sees end-of-file. The server should handle each incoming connection in a separate child process (i.e., a concurrent design). For each incoming connection, the server should read the command from the socket (until end-of-file), and then exec a shell to perform the command. Here are a couple hints:
See the implementation of system() in Section 27.7 for an example of how to execute a shell command. By using dup2() to duplicate the socket on standard output and standard error, the execed command will automatically write to the socket.
Compare and contrast the data communication technologies of guided media and unguided media. This should include transmission media, data link control protocols, and multiplexing. Compare digital transmission to analog transmission to determine the a..
Conduct research to find examples of the differences between I.T. security controls and countermeasure gap analysis, and identify tactical, strategic, risk mitigation, threats, and vulnerability dimensions and gaps associated with compliance recom..
Pick one of the most useful interfaces defined by the .NET framework (e.g. IComparable, IComparer, etc), and describe a real world scenario that you would use one of these interfaces using code fragment or a complete program.
Design the logic (pseudocode and diagram) for a program that allows a user to continuously enter numbers until the user enters 0. Display the sum of the numbers entered.
Write a class (and a client class to test it) that encapsulates the evolution of the sales tax rates in the 50 U.S states over the last 10 years. Your only instance variable should be a two-dimensional array of values representing the sales tax ra..
The file is read into memory, all of it in one buffer, and the buffer is reversed, then the file is overwritten. For simplicity, we may assume that the maximum size of the file is 200000 bytes. If no file was selected an error message is displayed..
What are the advantages of a Web server?
The DOM with JavaScript and traversing the DOM with jQuery
Write a 1-2 page paper on a development lifecycle for an IDS system, including the following: Inception Configuration Deployment
Prior to writing your paper, you may choose to submit a short research topic proposal in the form of a short paragraph, to your instructor. If you choose to do so, please email a copy of your paragraph description of your Research Paper topic p..
Stockiest has to supply 400 units of a product every Monday to his customers. He gets the product at Rs. 50/- per unit from the manufacturer. The cost of ordering and transportation from the manufacturer is Rs. 75 per order. The cost of carrying inve..
Suppose an IP packet is fragmented into 10 fragments, each with 1% (independent) probability of loss. To a reasonable approximation, this means there is a 10% chance of losing the whole packet due to loss of a fragment. What is the probability of net..
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