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。
" C+ L* R/ g% I. v1. Which IOS feature provides dial pan scalability and bandwidth management for H.323 VoIP implementations?# Y# d% T6 Y _. S' D$ M
A. Gatekeeper3 z" q& d% H2 y/ r3 h J2 {' A! D1 o
B. Call Routing
8 b: L5 A4 R0 B* [: V' T7 y+ b8 aC. Call Admission Control" m/ d% Y6 E& _' Y
D. Digital Signal Processors
4 H/ |1 F6 Z& y/ ~7 tAnswer: A
% g. E/ {* ]. k( c& E6 F" g. j 1. Refer to the exhibit. Which statement is true?" n7 l1 h4 R' R: @ h
A. Telnet packet with a source address of 10.1.1.2 will be denied access to the control plane.0 z; m" b* D# o2 Y' `. G& [
B. Telnet packet with a source address of 10.1.1.2 forwarded to the control plane will be policed at he specified rate.; Q! q4 W& u& R) {
C. Telnet packets with a source address of 10.1.1.2 will be forwarded to be the control plane without constraint.
+ A H/ k% m& |0 S! e5 h7 M2 oD. Telnet packet with a destination address of 10.1.1.1 will be forwarded to the control plane without constraint.
. j: ?2 t) b8 kAnswer: C( V' B& b% O M% d: J$ J; Z
3. Which two statements about WRED are true? (Choose two .)
3 T" ]1 v3 O4 L; K( ^A. WRED can selectively discard priority traffic when the interface becomes congested and can provide differentiated performance characteristics for different classes of service./ j8 M/ L1 T& K. e( J a: y! Y7 A
B. Resource Reservation Protocal (RSVP) and WRED cannot be configured on the same interface.' @, N# o" V4 \ u5 M/ E
C. WRED will throttle back voice traffic only as a last resort.- `9 {* t1 Q/ J# ]& i
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.
5 ^3 L, d8 x+ |; }9 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.
5 `" K3 `9 T1 d% o4 KF. WRED treats non-IP traffic as precedence 4.6 v( c2 o7 x/ c. P* q' a
Answer: AD. | J, F( Y3 [
4. What is the purpose of the NBAR protocol discovery?
9 w! V" }8 m+ w8 NA. to build a Packet Description Language Module(PDLM) file to be used in protocol matching y( `9 r5 Y4 f$ R" G
B. to discover applications and build class maps for data classification
( }# w& \3 A: i0 P( c6 f6 gC. to look into the TCP or UDP payload and classify packets based on the content
: C! D& W( D4 d; k b6 ED. to build a database of all application data that passes through the router and queue the data accordingly/ e: }: z; E& V" t+ Y
Answer: C I5 F7 h2 l2 M
. W- U# W+ K; j) k% n) z
& {9 j- q5 z+ V, R5 {( ~9 w5. Which two functions can be provided by an Integrated Services Router (ISR) in a VoIP network? (Choose two)
- p, @- @( Y# Q7 u- mA. ISR can perform the functions of a multipoint control unit to facilitate voice conferencing.# `. s$ ]: I8 Y1 }
B. ISR can perform the function of a call agent in the event loss of communication with a CallManager .
4 H+ W% H' V% O3 p3 q6 ~C. ISR can provide XML applications to the phones.
9 a; H1 f( W L* Y1 o) qD. ISR can provide all of the functionality of a CallMannager in the event of loss of communication to the CallManager.
4 P6 l0 {& B8 v" Y3 `E. ISR can act as a voice gateway to the PSTN.
) ?: T$ p+ \2 n0 c0 |+ hAnswer: BE
" X/ t& ]" k& q4 W0 {% C7 i |