How is an intranet different from an internet, Computer Networking

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QUESTION

a) How is an Intranet different from an Internet?

b) State the main differences between a router and a switch

c) Explain the function of a modem

d) Calculate the download time of a 2.5 GB file with an ADSL connection with a downstream speed of 256 kbps and an upstream speed of 128 kbps

i. When the line is 100% usage

ii. When the line is 80% usage

Express your answers in Hours: Minutes: Seconds

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