【汇总】CCNP最新题库（大虾专用导航） 不断更新~~

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asmiller

QUESTION 335
7 ]9 a5 U* s; q9 r% O/ a" ]Which two statements about the various implementations of STP are true? (Choose two.)
( M& B! r- k. p  qA. Common Spanning Tree maintains a separate spanning-tree instance for each VLAN configured in the
network.
4 a- Z1 q% `% i; r# {B. The Spanning Tree Protocol (STP) is an evolution of the IEEE 802.1w standard.
C. Per-VLAN Spanning Tree (PVST) supports 802.1Q trunking.
4 t6 {# B7 G: KD. Per-VLAN Spanning Tree Plus(PVST+) is an enhancement to 802.1Q specification and is supported
! h+ f$ `- f+ I8 yonly on Cisco devices.
E. Rapid Spanning Tree Protocol (RSTP) includes features equivalent to Cisco PortFast, UplinkFast, and
2 G0 U4 e+ Y+ w) X2 VBackboneFast for faster network reconvergence.
F. Multiple Spanning Tree (MST) assumes one spanning-tree instance for the entire Layer 2 network,
& y8 V5 \$ l' l* v8 |' M# K6 Mregardless of the multiple number of VLANs.
3 F2 K1 d. y6 P2 P  VAnswer: DE
Section: Mixed Practice Questions 5
Explanation/Reference:
8 A8 ~) j$ j( {3 ]1 O6 Q# `. FPVST+对802.1D改进，只有CISCO设备支持。D选项的802.1Q有笔误，要改成802.1D。
MST使用instance，一个instance映射多个VLAN。
8 P( T( U+ h0 x* D! {/ u& I  w! D& k这一题的答案跟解释不符合。按解释选择的话应该选的是D,F

不知哪位高手能告诉我一下。谢谢