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发表于 2011-10-20 00:42:15
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9tut上的答案和解释。与楼主的不同,请确认。
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1 J: u4 R& W) `% P" ?4 TWhich two states are the port states when RSTP has converged? (choose two)8 l8 O0 y8 z" {( p
0 Y" B2 B1 e* Y bA. blocking
( Q+ B( |! I) {; A7 A4 j! Q- wB. learning . u- E' h, A- ^- k
C. disabled - l" t5 E2 b4 }
D. forwarding . D! B8 ]7 O2 N @& n
E. listening
$ J( Y9 k$ @, }. c6 w1 F
8 P, w/ b: d4 ~: \0 d, c! z" [Answer: A D2 i* d1 a; c0 Q3 N* U k
; j8 H1 Y7 N1 H1 S ?Explanation
@0 k: O( b V# a" J. ] }% d: c: `0 R I7 A2 ~
RSTP only has 3 port states that are discarding, learning and forwarding. When RSTP has converged there are only 2 port states left: discarding and forwarding but the answers don’t mention about discarding state so blocking state (answer A) may be considered the best alternative answer.; U \) p. N0 K% Q; Z# {( d
7 b8 e5 J" E$ }, d0 r
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2011-10-20 00:42:15
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