hi! with this assignment it came with a exe. simulation file which i
atttached along with this mail. u need to use start > run command to insert
the parameters and see the results. first type in ethersim.exe/? to see how
to key in the parameter. Please do let me know how this assignment works.
Thank you.
----- Original Message -----
From: "Allen May" <[EMAIL PROTECTED]>
To: "Cisco Group Study" <[EMAIL PROTECTED]>
Sent: Saturday, March 31, 2001 3:44 AM
Subject: Re: ANYBODY HELP ? I cant understand this assigment.....!
> I saw this on Star Trek once. You have to induce a subspace photon gamma
> ray beacon to neutralize the incorrect propogation electron strays in the
> data stream.
>
> heh...actually I don't have a clue. Which test is this for??
>
>
>
> ----- Original Message -----
> From: "Steiven Poh (Jaring)" <[EMAIL PROTECTED]>
> To: "Cisco Group Study" <[EMAIL PROTECTED]>
> Sent: Friday, March 30, 2001 12:30 PM
> Subject: ANYBODY HELP ? I cant understand this assigment.....!
>
>
> > The simulation code you are given treats the Ethernet as a star =
> > topology LAN with a central repeater and a line to each node. All =
> > traffic appears on every line. The simulation assumes that the longest =
> > distance from one station to another across an ethernet is 400m, and the
=
> > signal travels at 80% of the speed of light, which is 300 million metres
=
> > per second. Determine D for this network (D is the propagation delay =
> > across the network).=20
> > Conduct simulations of this network at 10%, 40%, 80%, 95% and 120% =
> > nominal utilization. Utilization is the proportion of the time that the
=
> > ethernet is carrying successful packets. The nominal utilization is the
=
> > utilization which would be achieved if all packets were successfully =
> > carried. For example, 40% nominal utilisation will be achieved when =
> > packets arrive at the rate 0.4 * 10,000,000 / (250*8) =3D 2000 packets =
> > per second. Some of these factors mean that the actual proportion of =
> > time during which the network is busy could be greater or less than 40%.
=
> >
> > In each of these simulations, you should measureor investigate:=20
> >
> >
> > a.. the effective utilization rate (only count bits successfully =
> > sent),=20
> > b.. the rate at which packets are rejected by the ethernet access =
> > layer (also known as the packet loss rate),=20
> > c.. packet throughput (ie. 1 - the loss rate),=20
> > d.. collision rate (collisions per packet),=20
> > e.. average number of packets involved in a collision,=20
> > f.. the average number of collisions experienced by a packet given =
> > that it experiences one collision, and=20
> > g.. the average delay experienced by a packet.=20
> > In addition, repeat the simulations at 40% and 80% for a network with =
> > 100 times the propagation delay, as might be experienced if the network
=
> > was extended over too wide a physical distance.=20
> >
> > Note that the package length in the program is in bytes, and some =
> > figures may not be explicitly designed in the program, it requires you =
> > to investigate from the program execution statistics.=20
> >
> > Submission Requirements=20
> >
> > The submission should be in the form of essay. In the essay, you
should=20
> >
> > 1. determine the number of bits which can be transmitted in the time D,
=
> > given that the transmission rate of the network is 10 Mbit/s, the =
> > average packet length is 250 bytes, and the nominal utilization level of
=
> > the network is 80%.=20
> >
> > 2. tabulate or plot these resultsfor the network of LAN at different =
> > nominal utilization. Also, you should comment on the significance of the
=
> > results for the successful management of an ethernet LAN.=20
> >
> > 3. tabulate or plot the results for the network (ie, 100 times the =
> > propagation delays) but only at 40% and 80% of the nominal utilization.
=
> > You shall comment on the implication of these experiments
> >
> >
> > _________________________________
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> >
>
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