Fast Ethernet

Question

Collision Domain Of Fast Ethernet is Limited to ____ m
 

1. 2.5
2. 25
3. 250
4. 2500

My Approach
Fast Ethernet is 100 BASE T   Where 100Mbps and Repeaters are used in 100m length
Therefore Collision Domain of Fast Ethernet would be 100 m

Collision Domain is maximum distance data travels without collision


 

Comments

ans is 2500

pg 382 3rd paragraph

https://books.google.co.in/books?id=m5Z20sMJGI8C&pg=PA382&lpg=PA382&dq=collision+domain+fast+ethernet+is+limited+to&source=bl&ots=wR9Yin4oJn&sig=KPGxGwJ4TgDxMVLIpbLzWyiNjj8&hl=en&sa=X&ved=0ahUKEwigzLPAj4XQAhWGro8KHUJpAL4Q6AEINjAE#v=onepage&q=collision%20domain%20fast%20ethernet%20is%20limited%20to&f=false

---

2500 metre limitation is to achieve data rate of 10Mbps.

As Fast Ethernet is 100Mbps,

So 250 metre limitation is Correct Answer.

Answer 1

Collision domain 

L/ B = 2 * d/v

d is distance,L is packet size,V is velocity,B is bandwidth

So 72B / 100Mbps = 2 * d/ (2 * 10^8 m/sec)

L is of ​72B is minimum frame size to detect collision...

V is standard velocity for Ethernet...

So d is 576m (collision domain)

As per standard it ia taken 250m 

For gigabit ethernet distance won't be decrease but 72B + padding is used...

Comments

Could u pls tell How to calculate the same for Gigabit Ethernet  ? and its standard Domain ? I searched in internet but didn;t get standard distance .