Some networking questions I can't work out...

Hi there I am doing my CCNA and my MCSE finally after saving for ages,
anyway, I have the CCNA toolkit with the questions but

not the answers for that I have to buy the full toolkit, and money
being tight, I can't really afford to so I as wondering if

you guys can help.


The following questions I haven't managed to work out:

a)In relation to IEEE802.3 Ethernet media topologies:

i Explain the ‘5:4:3 Rule'.
ii. What is meant by the term ‘Extended Star' ?
iii. Explain how the 5:4:3 rule is applied in an extended star
network. Clearly show how the rule limits the topology of

an extended star network.


b)Explain what is meant by the terms vulnerable time and collision
window. Calculate the vulnerable time and collision window

for the following networks based upon knowledge of their cable length
specifications:

i. 10Base2
ii. 10BaseT
iii. 100BaseT

In each case determine the slot time specified within the IEE802.2
standards and compare with the collision window calculated

above. Discuss the reason/s why your answers differ from those
specified.


c)Describe carrier extension used in Gigabit Ethernet and explain why
it is necessary.


Now I just don't know how to even answer those hard questions PLUS,
how technical do I have to go in oder to get the markrs I

need.


Thanks very much.

On 8 Feb 2004 07:25:28 -0800, (E-Mail Removed) (Fox) wrote:

> I as wondering if
>you guys can help.

Do a google search and start reading. You might learn something.

Dan


>
>The following questions I haven't managed to work out:
>
>a)In relation to IEEE802.3 Ethernet media topologies:
>
>i Explain the ‘5:4:3 Rule'.
>ii. What is meant by the term ‘Extended Star' ?
>iii. Explain how the 5:4:3 rule is applied in an extended star
>network. Clearly show how the rule limits the topology of
>
>an extended star network.
>
>
>b)Explain what is meant by the terms vulnerable time and collision
>window. Calculate the vulnerable time and collision window
>
>for the following networks based upon knowledge of their cable length
>specifications:
>
>i. 10Base2
>ii. 10BaseT
>iii. 100BaseT
>
>In each case determine the slot time specified within the IEE802.2
>standards and compare with the collision window calculated
>
>above. Discuss the reason/s why your answers differ from those
>specified.
>
>
>c)Describe carrier extension used in Gigabit Ethernet and explain why
>it is necessary.
>
>
>Now I just don't know how to even answer those hard questions PLUS,
>how technical do I have to go in oder to get the markrs I
>
>need.
>
>
>Thanks very much.