300-101 几道选择题答案不确定

爱一一

请问各位大侠一下几道题到底选什么？题库给的答案不一致。
QUESTION 117
2 y% l3 D- W9 R4 sThe enterprise network WAN link has been receiving several denial of service attacks from
/ I% A- S4 D6 j% |/ [- R$ ~! K/ oboth IPv4 and IPv6 sources. Which three elements can you use to identify an IPv6 packet
via its header, in order to filter future attacks? (Choose three.)
& l( i0 l. ?- N6 D( }1 f" O/ {9 `A. Traffic Class
B. Source address
) L1 @& e4 s( L& c3 _6 A. oC. Flow Label
D. Hop Limit
: I0 W: z# f! f0 V; qE. Destination Address
F. Fragment Offset

是选ACD, 还是选BCE
/ l2 J( N5 Y; c& j7 p4 ^, @
QUESTION 138
5 F: w& S. i8 [0 j0 QOther than a working EIGRP configuration, which option must be the same on all routers
for EIGRP authentication key rolleover to work correctly?
' m# l) J& T# d; e# RA. SMTP
B. SNMP
C. Passwords
; B7 V+ |# W) e. b/ W- v% a" b* dD. Time
, \4 L+ I3 D4 @2 H- ?+ n! l) G
选D还是c？

5 t/ ?, P; G/ o4 r7 DQUESTION 425
What is the minimum log level for the event generated when an ACL drops a packet?
% M" F4 ~: _3 B( U7 G: vA. 3
B. 4
C. 5
& x$ E! ]2 s& l" f+ O$ G  _+ U7 FD. 6
E. 7

7 r- A( W4 G4 \$ w2 F! u选E？

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