Scenario 1: After visiting your doctor, you need to let your teacher, Mr. Ellis, know that you will miss the next three days of school. You are concerned because you will miss not only the last day working with your group on a project, but also your group’s presentation day. Write an email to your teacher explaining your situation and your concerns, and include what you consider to be an appropriate request and/or solution to your dilemma. To: Ms. Ellis

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3. bob is arguing that if you use output feedback (ofb) mode twice in a row to encrypt a long message, m, using the same key each time, it will be more secure. explain why bob is wrong, no matter what encryption algorithm he is using for block encryption (15 points).

1. which of the following statements are true about routers and routing on the internet. choose two answers. a. protocols ensure that a single path between two computers is established before sending packets over it. b. routers are hierarchical and the "root" router is responsible for communicating to sub-routers the best paths for them to route internet traffic. c. a packet traveling between two computers on the internet may be rerouted many times along the way or even lost or "dropped". d. routers act independently and route packets as they see fit.

*! 20 points! *jeff wants to create a website with interactive and dynamic content. which programming language will he use? a. dhtml b. html c. css d. javascript