Madge Networks 802.11b Instrukcja Użytkownika Pobierz pdf (Strona 11)

FDDI -Fiber Distributed Data Interface

(ANSI X3T12)

• Similar to token ring, except that

– FDDI runs on fiber-optic (token ring runs on twisted pair)

– FDDI is based on IEEE 802.4 token bus rather than IEEE 802.5

token ring standard

• In Token bus, token is explicitly transmitted to the “next” node

– Has two counter-rotating rings i.e., data flow is in opposite direction

to the other ring

• Rings are independent: primary and secondary

• During normal operation primary ring is used

• During node failure, the primary ring wraps around secondary

ring, creating a single ring and bypassing the failed node

– All nodes participate equally in maintaining the FDDI ring

– Data rate is : 100 Mbps

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 44 45

Brak uwag

Madge Networks 802.11b Instrukcja Użytkownika Strona 11