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.
642-812 Exam
Demo
3. Which statement is true about RSTP topology changes?
A. Any change
in the state of the port generates a TC BPDU.
B. Only nonedge ports moving to
the forwarding state generate a TC BPDU.
C. If either an edge port or a
nonedge port moves to a block state, then a TC BPDU is generated.
D. Only
nonedge ports moving to the blocking state generate a TC BPDU.
E. Any loss of
connectivity generates a TC BPDU.
Answer: B
4. Refer to the exhibit. What is the effect when the switchport priority
extend cos 3 command is configured on the switch port interface connected to the
IP phone?
A. Effectively, the trust boundary has been moved to the PC
attached to the IP phone.
B. The computer is now establishing the CoS value
and has effectively become the trust boundary.
C. The IP phone is enabled to
override with a CoS value of 3 the existing CoS marking of the PC attached to
the IP phone.
D. The switch will no longer tag incoming voice packets and
will extend the trust boundary to the distribution layer switch.
E. RTP will
be used to negotiate a CoS value based upon bandwidth utilization on the
link.
Answer: C
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