請問 300-101 題庫（2017.5.12 ) 的 Q202.222.228

javie

QUESTION 202
" p# q' _0 J( u- K" U/ H5 sWhen unicast reverse path forwarding is configured on an interface, which action does
3 F/ r# d4 `% k# Othe interface take first when it receives a packet?
# Q- k2 o  f* B; yA. It check the ingress access list
/ M! @( w* `6 s5 VB. It check the egress access list
C. It verifies that the source has a valid CEF adjacency
1 T6 \& q5 I7 kD. It verifies a reverse path via the FIB to the source
Correct Answer: A
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" K& r  g  |! }; {8 _" L6 UQUESTION 222
9 x/ _1 `# ^+ ^% C5 O, i+ TWhat’s uRPF checking first when the packet enters the interface ? or when unicast reverse patch
forwarding is configured on interinterface.
: X" _) C0 g; \- y3 PA. it check the ingress access list
0 c+ D, H1 V7 [) w4 Q+ ?B. it check the egress access list
) S& c2 c, ?: H% mC. Route available in FIB ot it verifies a reverse patch via the fib to the source
1 m( w% U2 z. P! o  |; M' RD. it verify that the source has a......
Correct Answer: C
" {+ W: @0 ]* r& T5 A) Q8 ~) D
QUESTION 228
When unicast reverse path forwarding is configured on an interface, which action does the interface
4 o+ ]: B2 k4 \% Z( K" Y) U: ktake first when it receives a packet?
A. it verifies that the source has a valid VEF adjacency.
8 {3 {" p  A. w' V9 MB. It checks the egress access lists.
C. it verifies a reverse path via the FIB to the source.
( j5 c0 l. `* ?% a: W% ID. It checks the ingress access lists.
! I' D: W* G7 kCorrect Answer: C

這三題意思是一樣的吧？為何 Q202 答案和其他兩題不同
5 }- j! d1 R0 g+ n0 G) j而且 Q202 和 Q228 題目完全一樣答案卻不同
+ `* |6 i& i) T4 U- J2 r我的認知是選「It checks the ingress access lists.」
. j4 B0 z3 J: z8 {# Q! }請版上先進解惑~謝謝
: {- U# }8 D/ l1 F& P
+ P: w8 P2 |+ X

killu0008

推一個~! 近期要考 感謝大大幫忙整理

smilemhfish

可以参考下闫辉老师最新的路由视频，Q202选D

javie

感謝回覆

weng200504546

smilemhfish 发表于 2017-5-24 21:25
! }! @# i; O0 }2 h$ R( q: `. Y: }% {可以参考下闫辉老师最新的路由视频，Q202选D

三个都选择这个答案吗？