Sun-microsystems 1.0 Uživatelský manuál stáhnout pdf (Strana 171)

Glossary 145

TRT

(Token Rotation Timer). A timer in the FDDI MAC protocol that measures the

time between receipt of tokens. It expires when it reaches a value that exceeds

the Target Token Rotation Time (TTRT).

TTRT

(Target Token Rotation Time). A parameter in the FDDI MAC protocol that is

negotiated by all of the stations on a ring at the time a ring is brought up. FDDI

uses the TTRT in conjunction with the TRT and THT to allocate bandwidth to

individual stations on the ring. The FDDI MAC protocol guarantees that the

worst-case delay a token will experience while circulating the ring will never

exceed twice the negotiated TTRT.

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Sun-microsystems 1.0 Uživatelský manuál Strana 171