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Voice Questions


Here you will find answers to Voice Questions
Question 1
Refer to the exhibit. Voice traffic is marked “precedence 5.” How much bandwidth is allocated for voice traffic during periods of congestion?
!
class-map match-all Signal
match ip precedence 3
class-map match-any System
match access-group name Security
match ip precedence 6
match ip precedence 7
class-map match-all Bearer
match ip precedence 5
!
!
policy-map ProviderOut
class Bearer
priority 48
class Signal
bandwidth 15
class System
bandwidth 15
class class-default
fair-queue
random-detect
shape average 512000
!
interface Ethernet0/1
description Provider Interface
ip address dhcp client-id Ethernet0/1
ip access-group 111 in
ip nat outside
full-duplex
no cdp enable
service-policy output ProviderOut
!
A. a minimum of 48 kb/s
B. a maximum of 48 kb/s
C. a minimum of 48% of the available bandwidth
D. a maximum of 48% of the available bandwidth

Answer: B
Question 2
Refer to the exhibit. Which of these is applied to the Bearer class?
!
class-map match-all Signal
match ip precedence 3
class-map match-any System
match access-group name Security
match ip precedence 6
match ip precedence 7
class-map match-all Bearer
match ip precedence 5
!
!
policy-map ProviderOut
class Bearer
priority 48
class Signal
bandwidth 15
class System
bandwidth 15
class class-default
fair-queue
random-detect
shape average 512000
!
interface Ethernet0/1
description Provider Interface
ip address dhcp client-id Ethernet0/1
ip access-group 111 in
ip nat outside
full-duplex
no cdp enable
service-policy output ProviderOut
!
A. WRED 
B. traffic shaping 
C. packet marking 
D. packet classification 
E. FIFO queuing within the class

Answer: E
Question 3
What is the overall type of queuing being used on the outgoing data for interface Ethernet0/1?
!
class-map match-all Signal
match ip precedence 3
class-map match-any System
match access-group name Security
match ip precedence 6
match ip precedence 7
class-map match-all Bearer
match ip precedence 5
!
!
policy-map ProviderOut
class Bearer
priority 48
class Signal
bandwidth 15
class System
bandwidth 15
class class-default
fair-queue
random-detect
shape average 512000
!
interface Ethernet0/1
description Provider Interface
ip address dhcp client-id Ethernet0/1
ip access-group 111 in
ip nat outside
full-duplex
no cdp enable
service-policy output ProviderOut
!
A. LLQ 
B. FIFO 
C. CBWFQ 
D. priority queuing 
E. weighted fair queuing 
F. IP RTP priority queuing

Answer: A
Question 4
An expanding company is deploying leased lines between its main site and two remote sites. The bandwidth of the leased lines is 128kb/s each, terminated on different serial interfaces on the main router. These links are used for combined VOIP and data traffic. The network administrator has implemented a VOIP solution to reduce costs, and has therefore reserved sufficient bandwidth in a low latency queue on each interface for the VOIP traffic. Users now complain about bad voice quality although no drops are observed in the low latency queue. What action will likely fix this problem?
A. mark VOIP traffic with IP precedence 6 and configure only “fair-queue’ on the links 
B. configure the scheduler allocate 3000 1000 command to allow the QoS code to have enough CPU cycles 
C. enable class-based traffic shaping on the VoIP traffic class 
D. enable Layer 2 fragmentation and interleaving on the links
E. enable Frame Relay on the links and send voice and data on different Frame Relay PVCs

Answer: D
Question 5
You are the network administrator of an enterprise with a main site and multiple remote sites. Your network carries both VOIP and data traffic. You agree with your service provider to classify VOIP and data traffic according to the different service RFCs. How can your data and VOIP traffic be marked?
A. data marked with DSCP AF21, VOIP marked with DSCP EF
B. data marked with DSCP AF51, VOIP marked with DSCP EF
C. data marked with the DE-bit, VOIP marked with the CLP-bit
D. data marked with DSCP EF, VOIP marked with DSCP AF31
E. data marked with IP precedence 5, VOIP marked with DSCP EF

Answer: A
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