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Supplementary material for
T175A: Networked living: Exploring Information and Communication technologies
Question One (10 marks)
(d on in general Block 1 ideas and specially Block 1 Part2 Session 1)
In a Company a number of hand scanners are distributed in different buildings to for login and log out purposes. They are all connected to a main server through the wired network. An employee has a PC, printer and scanner in his/her office.
a) Draw an alent block diagram and write key processes in black and others in grey.
(6 marks)
b) Write the block deion for the hand scanners key process.
(3 marks)
c) If employees are goring to share the printer. Modify the above system map to reflect that.
(1 mark)
Question Two (12 marks)
a) (d on Block 1 Part 1 Session 2, Block 2 Part 3 Session 2)
Giving that T is a shortcut of Tera which is alent to 1024 Giga, find out the alent storage capacity of 8.25 TB in bits in scientific notation and rounded to 4 digits.
(4 marks)
b) (d on Block 2 Part 3 Session 2 )
Use the ‘short-cut’ method to evaluate the following, write the result in scientific notation. (Show the steps in details)
(4 marks)
c) (d on Block 2 Part 3 Sessions 3 and 6)
Estimate how many times larger the duty cycle of device A that typically connects to a network and transmits for 20 ms in every 0.5 second to device B which transmits for 40 ms in every 2 seconds.
(4 marks)
Question Three (8 marks)
a) (d on Block 1 Part 2 Session 3, Block 2 Part 3 Session 7)
Compare RFID technology with Barcode systems by filling the following table.
Characteristics RFID Technology Barcode System
How transmitted
Equipment needed
Items identification
Potential information stored
Damage possibility
(5 marks)
b) For each of the following figures choose a suitable network technology and justify your choice.
Network 1 Network 2
(3 marks)
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