Wep is supposed to protect data sent over a wireless link. as discussed in the text, wep has many security flaws, one of which involves its use of initialization vectors, or ivs. wep ivs are 24 bits long. wep uses a fixed long-term key k. for each packet, wep sends an iv in the clear along with the encrypted packet, where the packet is encrypted with a stream cipher using the key kjy = (iv, k), that is, the iv is pre-pended to the long-term key k.
suppose that a particular wep connection sends packets containing 1500 bytes over an 11 mbps link.
a. if the ivs are chosen at random, what is the expected amount of time until the first iv repeats? what is the expected amount of time until some iv repeats?
b) why is a repeated iv a security concern?

Assignment directions the owner of a popular local coffee shop has approached you to design a network for his business. he would like to offer his customers wifi access to the internet, but also thinks it might be handy to network the kitchen and store room together with the office computer he already uses for ordering, scheduling, and payroll. he thinks that might save him time doing inventory control and ordering. your assignment is to create a set of questions for him that will precisely define the purpose of the network and any constraints and restrictions on its implementation. assignment guidelines create a list of at least ten questions to ask your customer. of those ten questions, at least one question must come from each of the following subject areas: purpose of the network network access and security issue network availability and fault tolerance issues future expansion issues vendor issues briefly explain in two or three sentences why you would ask each question and what you expect to learn from your customer’s response. submission requirements your questions should meet the criteria of a good survey question by being specific, unambiguous, and closed-ended. all questions, as well as your explanations, should be written in proper english using correct grammar, spelling, and punctuation. use complete sentences, and do not use slang, texting abbreviations, or shortcuts.

What is the first step in creating a maintenance ?

A911 dispatcher is the sole sender of messages to all police officers. while on patrol, officers communicate with the dispatcher who, in turn, relays messages to other officers. the officers do not communicate directly with one another. this illustrates a network.