题库比较稳定,实验题show run 稍微看下分类及对应的DSCP值即可,有时参数或顺序会变化。+ {* g& a2 d2 J) Z! [
1. Which IOS feature provides dial pan scalability and bandwidth management for H.323 VoIP implementations?' N# f7 E" z+ {( t+ f3 ]9 T i
A. Gatekeeper
, T, e* Z6 H5 bB. Call Routing
- d( |& P# R5 p; D6 DC. Call Admission Control
9 L) i, M+ i0 m {. HD. Digital Signal Processors
1 w+ z% i* s: ^/ i+ {* `9 H0 hAnswer: A' P* C) K, \- L6 c2 C
1. Refer to the exhibit. Which statement is true?
8 X" y7 ]& h* L3 aA. Telnet packet with a source address of 10.1.1.2 will be denied access to the control plane.' D0 z* u/ o0 \+ t7 P. u1 H% _. E6 e
B. Telnet packet with a source address of 10.1.1.2 forwarded to the control plane will be policed at he specified rate.
% T) F5 f" l9 d# ~C. Telnet packets with a source address of 10.1.1.2 will be forwarded to be the control plane without constraint.
: I2 b; U0 r. H! N- b5 c" kD. Telnet packet with a destination address of 10.1.1.1 will be forwarded to the control plane without constraint.
5 l" r$ k8 L( M: O1 z9 l7 ?0 KAnswer: C @& z, A4 J: A: ]( s
3. Which two statements about WRED are true? (Choose two .)& G! w; ?9 n y2 v5 \
A. WRED can selectively discard priority traffic when the interface becomes congested and can provide differentiated performance characteristics for different classes of service.0 P+ i4 o( y0 F- O" _6 `) H+ I
B. Resource Reservation Protocal (RSVP) and WRED cannot be configured on the same interface.
5 a3 q4 x& F, W5 q8 {# J- V% C8 AC. WRED will throttle back voice traffic only as a last resort.6 u: l9 ]+ M( S4 h3 D# k
D. If the average queue length is greater than the minimum threshold but less than the maximum threshold, the based on the drop probability, WRED will either queue the packet or perform a random drop.
L0 p3 O% z& GE. WRED statistically drops more packets from low-bandwidth users than high-bandwidth users. Therefore, traffic source that generate the least traffic are more likely to be slowed down than traffic source that generate the most traffic.9 d/ W8 }0 o. Q0 p+ f
F. WRED treats non-IP traffic as precedence 4.
], p3 a& S: r* W1 z9 IAnswer: AD3 X( V( b" Y( t9 y5 p
4. What is the purpose of the NBAR protocol discovery?
; L0 r+ c: z) b5 k+ _A. to build a Packet Description Language Module(PDLM) file to be used in protocol matching ) X$ J9 ^1 I# s% c, d$ t q
B. to discover applications and build class maps for data classification
: H Y6 Q2 c& B' T7 Z. MC. to look into the TCP or UDP payload and classify packets based on the content
* f4 p9 Q5 c9 e: \& M; j7 u8 _$ T JD. to build a database of all application data that passes through the router and queue the data accordingly
0 k8 u7 |% V: _! v' P3 }8 q/ }Answer: C1 M$ O7 N; |) `$ B- e& |4 s
9 Z4 p' y) b) K( k: I7 P
& U" s1 p0 [& F5. Which two functions can be provided by an Integrated Services Router (ISR) in a VoIP network? (Choose two)
* M' U/ C4 _- q7 ~A. ISR can perform the functions of a multipoint control unit to facilitate voice conferencing.% [5 s, u- d3 H6 ~" G0 o, d. \
B. ISR can perform the function of a call agent in the event loss of communication with a CallManager .1 V" I' C* t0 ?7 M
C. ISR can provide XML applications to the phones.
( X' p% g9 U" nD. ISR can provide all of the functionality of a CallMannager in the event of loss of communication to the CallManager.
! }. n' W4 b5 w, RE. ISR can act as a voice gateway to the PSTN.
6 m( l* z7 u/ k! q: }Answer: BE3 Y M$ d* e. Z" f8 ^3 ^1 ~& O
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