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初级工程师
  
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目前有三道题,不知道该怎么选,求指教~~~~1 L0 f& e$ A( A/ J \; M3 }. o
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In which two modes do IPv6-in-IPv4 tunnels operate? (Choose two.); T4 a0 m# p4 C) y4 K0 m6 O: A
A. tunnel mode3 m4 R' i0 y& m" C
B. transport mode+ y! S, q4 ^* a# u: q8 {
C. 6to4 mode
0 C1 W( Q' S# b/ A# [7 @# A oD. 4to6 mode! f2 X0 Q; c+ }& n
E. ISATAP mode
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Q986 Q1096这道题选AB Q50里面选CE
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还有这道: D) I( w6 q. I6 }2 W
Which statement about NAT64 is true?" z) f! N- f3 }7 D0 ?
A. NAT64 provides address family translation and translates IPv4 to IPv6 and
$ e, k B+ t1 |% u) pIPv6 to IPv4.
6 G/ [% e4 S1 R |: Z0 R3 XB. NAT64 provides address family translation and can translate only IPv6 to
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C. NAT64 should be considered as a permanent solution.
' ], k- y3 p9 o7 V8 j9 T) ]D. NAT64 requires the use of DNS64
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( s1 t2 m/ ?6 C有的题库选A,有的选B ,能看懂的同学,给详细解释一下吧" V& Q( l6 ]. z% U) K5 g
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还有一道Q22里面的题:
! m* n. D z" L. s& |4 z( K5 hwhat are two requirements for NSF operation in an MPLS L3 VPN?1 P2 {+ b l! x7 f) I1 G1 {
A.SSO must be active, M& ?$ X! r& w4 ]$ S
B.Graceful restart must be configured in BGP
3 @3 a5 J& X8 U$ L1 ^ m9 K5 O4 ^C.Stateful HA must be deployed% {- b! r3 H/ E4 @7 K5 s9 C* r" v- B
D.ISSU must be active
5 E+ ^4 F# B" W3 ^. G" TE.The NSF must bve configured for Layer 2 traffic
) [/ i+ \4 G; A% w$ j/ E/ `* VF.Graceful restart must be configured in LDP% R1 P4 ~0 V* | G( y8 N
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这道题Q1069里面选AD Q22里面选的是BF
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