RS 400-101 笔试题库 个别易混淆题 求证

mangangcs

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8 g* i* }1 J/ p  S! T& ]目前有三道题，不知道该怎么选，求指教~~~~

一：
In which two modes do IPv6-in-IPv4 tunnels operate? (Choose two.)
! E$ m( M: d1 j2 [6 O8 K) ?: zA. tunnel mode
B. transport mode
9 h# M, O2 _+ _- V' G- {4 }3 mC. 6to4 mode
D. 4to6 mode
E. ISATAP mode

, U& e2 z0 ^2 N' U, gQ986 Q1096这道题选AB    Q50里面选CE
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+ Z) R* @3 n5 s; s( A5 e5 @二：
  m4 @" }: R, t) q5 k9 y; j还有这道：
Which statement about NAT64 is true?
$ D  ]6 k' q/ x8 ?8 {$ KA. NAT64 provides address family translation and translates IPv4 to IPv6 and
IPv6 to IPv4.
B. NAT64 provides address family translation and can translate only IPv6 to
IPv4.
C. NAT64 should be considered as a permanent solution.
D. NAT64 requires the use of DNS64

0 Y! N# ]* l6 F1 L7 X) l1 k有的题库选A，有的选B   ，能看懂的同学，给详细解释一下吧

三：
  [( y6 t/ [- W7 x还有一道Q22里面的题：
, A' r- \; k: V$ Xwhat are two requirements for NSF operation in an MPLS L3 VPN?
A.SSO must be active
B.Graceful restart must be configured in BGP
# u: ^# K& k, i$ e0 cC.Stateful HA must be deployed
% o& i, `0 h$ \# w* O+ N) ], g0 YD.ISSU must be active
; O. C+ f( I2 FE.The NSF must bve configured for Layer 2 traffic
F.Graceful restart must be configured in LDP
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这道题Q1069里面选AD    Q22里面选的是BF

mangangcs

顶顶顶顶顶~~~~~~~~~~~~

luopoxy

同求 NAT64 这题确实有2种答案，求高手解答