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助理工程师
 
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发表于 2018-12-4 17:35:04
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显示全部楼层
) K2 [8 c. x: I在300-135 offical cert guide,有兩題 a8 N$ [2 w/ f# d, I2 _9 v
+ O, ?, L/ u u$ b) X @/ B
11. Which statements are true about GRE tunnels?
: ?# G# ~. k1 |' M1 la. The original packet is encapsulated in a GRE header only.
( r; o8 E& \3 `% o+ [b. The original packet is encapsulated in a GRE header, and then a new IP header is) ]* z0 i% v8 Y- n5 |
added.! K8 {0 m( A! E4 V! f" g: q
c. The original packet is encapsulated in an IP header, and then a GRE header is
8 q! D8 A% L7 z; |7 ]added.# v4 k; t+ n5 r- l! I' F, D
d. The original packet header is rewritten by the GRE header.
. h. K, J1 x$ g- g答案是B( f3 a8 ~5 h& p: n, E( f! N
12. When creating a virtual tunnel interface, what is the default tunnel mode?5 K9 P& z% q2 k9 Z0 K( z
a. GRE/IP Y! j! H2 W `' W% q2 a
b. GRE/IPv6
9 E* F6 z/ A, }0 g7 B1 `, c2 F0 Hc. IPv6/IP9 O, Q- N) {9 z9 y
d. GRE/Multipoint
! |: B1 _6 ?* p% c9 T答案是A
7 e+ ~( k+ S9 k: C
/ \3 Q$ F5 E/ a& P我認為GRE/IP為by default,GRE encapsulate original packet,加上new IP header是正確的,6 F) X2 o& z% X) c4 s
所以選BC應該沒錯 |
22#
2018-12-4 17:35:04
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