________________________________________
Supplementary
material for
T175A:
Networked living: Exploring Information and Communication technologies
Question
One (10 marks)
(Based 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 equivalent block diagram and write key processes in black and others in
grey.
(6 marks)
b) Write
the block description 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) (Based
on Block 1 Part 1 Session 2, Block 2 Part 3 Session 2)
Giving
that T is a shortcut of Tera which is equivalent to 1024 Giga, find out the
equivalent storage capacity of 8.25 TB in bits in scientific notation and
rounded to 4 digits.
(4 marks)
b) (Based
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)
c) (Based
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.
Question
Three (8 marks)
a) (Based
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)
