Talk:Fiber Distributed Data Interface

Removed text

I removed the following text which doesn't belong: "FDDI also uses the 4B/5B digital signal encoding method instead of the Manchester encoding method used by Token Ring and Ethernet. The use of 4B/5B provides nearly the same real world throughput on a 100Mbit link as Ethernet would achieve using 200Mbit." Although it is true that FDDI uses 4B/5B encoding, that detail doesn't really fit in the current article, which is fairly high level. When the article evolves to include lower level details (like the MAC, PHY, and various PMD layers), this would fit in. The second sentence is simply untrue; encoding has no effect on throughput. Indeed, Fast Ethernet itself uses the same 4B/5B encoding method as FDDI! --Rick Sidwell 04:07, 6 March 2006 (UTC)[reply]

FDDI doesn't use the "token ring" algorithm

It's a popular but incorrect claim that FDDI uses the token ring (meaing the IEEE 802.5) protocol. FDDI is indeed a ring network, but its MAC (Media Access Control) protocol is fundamentally different from 802.5. Instead, it was adapted from IEEE 802.4 (token bus). FDDI and 802.4 both use a "timed token" approach, while 802.5 does not. Paul Koning 14:49, 23 March 2007 (UTC) Elie Hachache[reply]