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游客
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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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: c" m/ Q3 O$ nWhich two states are the port states when RSTP has converged? (choose two)+ W- W! i' w' ^
7 `! L5 v4 L" H; I& uA. blocking
9 b# Z5 j* _ XB. learning
) T" _* q* X [7 i3 O6 EC. disabled 1 ~+ G' H5 z9 ?
D. forwarding $ S' |+ i7 }+ Q- k/ }" B+ Z! `/ T
E. listening( N! O& a u' ]7 I2 s+ K6 Z
6 J- D' i$ g- O c" ]
Answer: A D$ U( A3 s/ J; S$ M8 L0 D4 A* l+ c
/ |1 Y& H1 H0 n: `: C, K* @
Explanation" q; h4 W r2 `% }' d
4 i# G1 m6 H9 x# ^" ?5 _
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.+ C7 Z1 p. x( a; l3 x4 B, Y
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