813的一个选择题求解......>>>>>>>>>>

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813题库中有2个题一样，但是给的答案却不一样，求解呀！！！！！！！！！
QUESTION 289
Which two statements correctly describe characteristics of the PortFast feature? (Choose two.)
% T, g$ r- j# G6 mA. STP will be disabled on the port.
B. PortFast can also be configured on trunk ports.
0 w8 f9 S- y& n. u& {* \C. PortFast is required to enable port-based BPDU guard.
D. PortFast is used for both STP and RSTP host ports.
E. PortFast is used for STP-only host ports.
$ S/ \* o, N5 e" T. ]. Z( L" ]Answer: BD
Section: Mixed Practice Questions 3

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( d% X7 e% |  G- iQUESTION 374
Which two statements correctly describe characteristics of the portFast feature?(choose two)
A. STP is disable on the port
B. PortFast can also be configured on trunk ports
8 J' c5 Q* u* O7 u8 g$ rC. PortFast is needed to enable port-based BPDU guard
. V" i( O9 X7 M5 ?8 |2 R; p+ Z( `D. PortFast is used for STP and RSTP host ports
E. PortFast is used for STP-only host ports
" a. t- b' v& m% f+ HAnswer: CE
Section: New Topic
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5 {% o6 V1 P, x  x) B
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zoom123

choose bd

qingqing123

BD两项正确。

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qingqing123 发表于 2011-6-20 13:43
8 }: p; ?) }! y1 `0 hBD两项正确。

; h! \$ j0 ]3 k9 Z' I2 n谢了！

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zoom123 发表于 2011-6-19 16:29
choose bd

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drainer01375