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Comprehension: In the following passage some of thesn words have been deleted. Read the passage carefully and select the correct answer for the given blank out of the four alternatives. Network security (1) ______ securing a network and protecting the user’s information about (2) ______ is connected through that network. Over the network (3) ______ steal, the packets of data through iffing and spoofing (4) ______, man in the middle attack, was driving, etc, and misuse the data for their (5) ______. Select the most appropriate option to fill in blank number 1.