Explain how to setup a TCP connection.
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First, the source computer delivers a SYN packet to the destination computer. This packet has the initial sequence number (ISN) that the destination computer must use in order to send a response (ACK) to the source computer. The ISN is indicated by whether the SYN bit is "set." For example, if the SYN bit is set to 1, the 32-bit sequence number represents ISN. However, if the SYN bit is not set, meaning the value of the SYN bit is zero (0), the 32-bit number represents the (ongoing) sequence number.
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Case-Based Critical Thinking QuestionsCase 22-1Ethan is in charge of Internet security for a small company. Employees are often asking him questions related to their identity and privacy online, as well as about some phishing schemes. Below are three of these questions. I have received an e-mail that warns about a devastating new virus, tells how to remove it, and encourages me to notify all my friends. What is this e-mail called?
A. an infection hoax B. a virus warning C. a virus hoax D. a virus scam
Which of the following about nested IIf functions is FALSE?
A) When having one IIf function nested inside another, the second IIf function becomes the falsepart of the first IIf function. B) You can create a nested IIf function, allowing you to evaluate a series of dependent expressions. C) When having one IIf function nested inside another, the second IIf function becomes the truepart of the first IIf function. D) A nested IIf function is used when you need to test for multiple conditions.
List three decisions that Mr. Madison can make using the data in the workbook and what type of decision each is—structured, unstructured, or semi-structured
What will be an ideal response?
?In data and process modeling, a(n) _____ shows what the system must do, regardless of how it will be implemented physically.
A. ?organizational model B. ?physical model C. ?logical model D. ?relational model