642-812 BCMSN
Building Converged Cisco Multilayer Switched
Networks
Exam Number: 642-812
Associated Certifications: CCNP, CCIP, CCDP
Duration: 90
minutes (50-60 questions)
Available Languages: English, Japanese
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642-812 Exam Description
The Building Converged Cisco Multilayer Switched
Networks (BCMSN 642-812) is a qualifying exam for the Cisco Certified Network
Professional CCNP® and the Cisco Certified Design Professional CCDP®
certifications. The BCMSN 642-812 exam will
certify that the successful candidate has important knowledge and skills
necessary to implement scalable multilayer switched networks. The exam includes
topics on Campus Networks, describing and implementing advanced Spanning Tree
concepts, VLANs and Inter-VLAN routing, High Availability, Wireless Client
Access, Access Layer Voice concepts, and minimizing service Loss and Data Theft
in a Campus Network.
Exam : Cisco 642-812
Title :
BCMSN – Building Converged Cisco Multilayer Switched Networks
6. Refer to the
exhibit. Switch S2 contains the default configuration. Switches S1 and S3 both
have had the command spanning-tree mode rapid-pvst issued on them. What will be
the result?
A. Switches S1 and S3 will be able to exchange traffic but
neither will be able to exchange traffic with Switch S2
B. Switches S1, S2,
and S3 will be able to pass traffic between themselves. However, if there is a
topology change, Switch S2 will not receive notification of the change.
C.
Switches S1, S2, and S3 will be able to pass traffic among themselves.
D.
IEEE 802.1D and IEEE 802.1w are incompatible. All three switches must use the
same standard or no traffic will pass between any of the switches.
Answer:
C
7. Which statement is true about IP telephony calls?
A. A Voice over IP
(VoIP) packet consists of the voice payload, IP header, TCP header, RTP header,
and Layer 2 link header.
B. The voice carrier stream uses H.323 to set up,
maintain, and tear down call endpoints.
C. Call control signaling uses
Real-Time Transport Protocol (RTP) packets that contain actual voice
samples.
D. The sum of bandwidth necessary for each major application,
including voice, video, and data, should not exceed 75 percent of the total
available bandwidth for each link.
Answer: D
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