Thread: gigabit networks
View Single Post
Old 18-08-2004, 13:24   #12
gazzae
Inactive
 
gazzae's Avatar
 
Join Date: Jun 2003
Location: Belfast
Age: 46
Posts: 4,594
gazzae is cast in bronzegazzae is cast in bronzegazzae is cast in bronzegazzae is cast in bronze
gazzae is cast in bronzegazzae is cast in bronzegazzae is cast in bronzegazzae is cast in bronzegazzae is cast in bronzegazzae is cast in bronzegazzae is cast in bronzegazzae is cast in bronzegazzae is cast in bronzegazzae is cast in bronzegazzae is cast in bronzegazzae is cast in bronzegazzae is cast in bronzegazzae is cast in bronzegazzae is cast in bronzegazzae is cast in bronzegazzae is cast in bronzegazzae is cast in bronzegazzae is cast in bronze
Re: gigabit networks
Quote:
Originally Posted by SOSAGES
so it will be working at 1000 if its over 25m ?
Yes

Quote:
http://www.pctechguide.com/29network...t_Ethernet.htm

The topology rules for 1000Base-T are the same as those used for 100Base-T, Category 5 link lengths being limited to 100 metres and only one CSMA/CD repeater being allowed in a collision domain. Migration to 1000Base-T is further simplified both by the fact that 1000Base-T uses the same auto-negotiation system employed by 100Base-TX, and the availability of product components capable of both 100 Mbit/s and 1000 Mbit/s operation.

[...]

In Fast Ethernet, the maximum cable length is reduced to a maximum of 100 metres, with the minimum frame size and slot time left intact. maintains the minimum and maximum frame sizes of Ethernet. Since it's 10 times faster than Fast Ethernet, for Gigabit Ethernet to maintain the same slot size, the maximum cable length would have to be reduced to about 10 metres, which is impractical. Instead, Gigabit Ethernet uses a larger slot size of 512 bytes.
gazzae is offline   Reply With Quote