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最新的 CCVP 642-432 免費考試真題:
1. How do a-law and mu-law handle issues with signal-to-noise ratios related to the measure of amplitude?
A) Increase code points at lower amplitudes.
B) Increase code points at higher frequencies.
C) Use smaller step functions at lower amplitudes.
D) Use smaller step functions at higher frequencies.
2. What is the best description of an MGCP endpoint?
A) IP phones
B) the gatekeepers in a VoIP network
C) any analog telephony device (PBX, switch, etc.)
D) the interconnection between packet and traditional telephone networks
3. You have a customer that is interested in determining the number of VoIP calls their Frame Relay WAN links can support. Each of their Frame Relay WAN links has 84 kbps of bandwidth available outside all other applications and overhead. How many G.729 calls using the 8 kbps codec and 20 byte sample size can be supported?
A) 2
B) 4
C) 1
D) 3
4. In the VoIP network above, which protocol provides the necessary sequence numbers so voice packets originating at R1 are played in the correct order at R5?
A) RTCP
B) UDP
C) RTP
D) TCP
E) CRTP
5. Refer to the exhibit. Select the recommended QoS configuration for the LAN segments of the network in the campus and branch office.
A) Configure WRR with voice as highest priority.
Use ACLs to classify voice traffic.
Isolate voice traffic in its own VLAN .
Configure access switches to trust traffic from IP phones.
B) Configure a PQ with WRR.
Use ACLs to classify voice control traffic.
Isolate voice traffic in its own VLAN.
Configure access switches to trust traffic from IP phones.
C) Configure a PQ with WRR.
Use ACLs to classify voice traffic.
Isolate voice traffic in its own VLAN.
Configure access switches to trust traffic from IP phones.
D) Configure a PQ with voice control as highest priority.
Use ACLs to classify voice control traffic.
Isolate voice control traffic in its own VLAN .
Configure access switches to trust voice control traffic from IP phones.
問題與答案:
問題 #1 答案: C | 問題 #2 答案: D | 問題 #3 答案: D | 問題 #4 答案: C | 問題 #5 答案: C |