1-2) Suppose computer #1 begins to transmit a packet that is
,1400 bytes long. After 1,200 bytes of transmitting, a
collision is detected. What should computer #1 do?
Is this an error, or a normal acceptable event?
3) Ethernet has a theoretical efficiency of ~38%. What is the practical limit to how fast a 100 Mb ethernet can send data?
About 15 Mb/second
About 30 Mb/second
About 38 Mb/second
About 90 Mb/second
4) I've just invented a new network, the Thuupernet. It
has a latency of 3 ms one way, and a bandwidth of 1 megabit/second.
How long does it take to send a 300 kilobyte jpg file?
5) Suppose a packet is sent on an ethernet. There are no collisions. Is the packet received by the receiver?
Yes, if there are no collisions the packet will be received.
No, there is no guarantee. For example ... _______________________________________________
6) A normal ethernet might have a latency of 0.5ms, and a
bandwidth of 100Mbit/second. What is the most time it can take
to send a 1 kilo-byte file?
7) Give one advantage of Token Ring over ethernet, and one
disadvantage
8-9) Normally, an ethernet card will wait a random amount of
time after a collision before it begins to retransmit. Suppose
I modify my card so this it retransmits immediately after a
collision. What will I, the user, notice?
Suppose everyone in my department does the same thing. What
will we notice?
10) Will an ethernet receiver ever receive a packet other
than the one transmitted. In other words, can corrupted data
ever be received? Explain.
11) Suppose two cards with the same MAC address were
placed on different ethernets. What would happen?
13) Suppose I ethernet keep as it is, except that
I double the maximum cable length. What else must I change
(if anything)?
15) Suppose I have a very lightly loaded network. My one goal is to minimize the average latency of small messages. Which is the best type of network. Why?
10 megabits/sec Ethernet. Why: _______________________________________________
10 megabits/sec Token Ring. Why: _____________________________________________
16) Batman and Wonder Woman are fighting over who has to do
the dishes next. Batman throws the first punch. Who
wins? Why?
17) Where is the Boy Wonder?
Grew up and went home
Working for his own paycheck
In bed watching cartoons
Studying for the next quiz