Exercise Set 2:
Turn-Around Overhead
Assigned: Wed. 21 Mar. 2007 (week 2) -- Due: Wed. 28 Mar. 2007 (week 3)
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[Lecture:
1.3 Point-to-Poin versus Buses] |
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2.1 Turn-around Overhead
In a shared-medium-based LAN (ehternet style),
we wish to keep the turn-around overhead (as defined in class)
down to 5 % of the useful transmission time
when the packet size is 80 bytes.
What is the maximum allowable distance between transmitters
in order to achieve this when the transmission rate is
(a) 10 Mbps, (b) 100 Mbps, (c) 1 Gbps, (d) 10 Gbps.
Transmission is bit-serial,
and the speed of light in the LAN medium is 200 Mm/s.