【2018.12.03】CCNP排错（300-135）题库V2.0

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jiashanpeng 发表于 2018-12-3 18:56
: d. l- `$ b( P, R2 S7 k& Y确实，这道题，两个版本答案不一样，期待乔帮主解决。

在300-135 offical cert guide，有兩題
" @1 G8 l) O# D4 C* {, r5 W! S) o
' Y) ?* y# A- P/ z4 _( ~( f% T! n+ [# Q11. Which statements are true about GRE tunnels?
a. The original packet is encapsulated in a GRE header only.
! l& u% h- [$ S( ^0 }b. The original packet is encapsulated in a GRE header, and then a new IP header is
7 t9 z3 K3 }2 p: F1 \9 Xadded.
c. The original packet is encapsulated in an IP header, and then a GRE header is
added.
d. The original packet header is rewritten by the GRE header.
+ e8 p! ~" ~2 I答案是B
0 o3 F! Z- C: Y, g9 M  @12. When creating a virtual tunnel interface, what is the default tunnel mode?
a. GRE/IP
+ c2 S& R# A6 t0 Ob. GRE/IPv6
; \0 @1 X4 J) _4 bc. IPv6/IP
d. GRE/Multipoint
- g5 p) j3 O0 \0 Y0 h答案是A

; G& o2 t/ q5 a# N( N+ ~9 i3 H我認為GRE/IP為by default，GRE encapsulate original packet，加上new IP header是正確的，
6 z5 l8 ]0 z* `( G: p1 K所以選BC應該沒錯

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