Free Cisco 642-437 Practice Test & Real Exam Questions
Which three methods are used by a Cisco Unified Border Element to provide network hiding? (Choose three.)
Correct Answer: A,B,C
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What is a Cisco Voice Gateway feature that enables class of service or calling privileges to be assigned?
Correct Answer: C
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DRAG DROP
Drag the components that make up Cisco fax relay and T.38 from the left and drop them under the appropriate category on the right.
Cisco 642-437 Exam
Drag the components that make up Cisco fax relay and T.38 from the left and drop them under the appropriate category on the right.
Cisco 642-437 Exam
Correct Answer:
Explanation:
Cisco fax relay is the oldest method of supporting fax on Cisco IOS gateways and has been supported since Cisco IOS Release 11.3. Cisco fax relay uses Real-Time Transport Protocol (RTP) as the method of transport. In Cisco fax relay mode, gateways terminate T.30 fax signaling by spoofing a virtual fax machine to the locally attached fax machine. The gateways use a Cisco-proprietary fax-relay RTP-based protocol to communicate between them.
T.38 Fax Relay provides an ITU-T standards-based method and protocols for fax relay. Data is packetized and encapsulated according to the T.38 standard. The encoding of the packet headers and the mechanism to switch from VoIP mode to fax relay mode are clearly defined in the specification.
http://www.cisco.com/en/US/docs/ios/12_3/vvf_c/voice_troubleshooting/old/vts_fax.html
What equipment should you use if you want to route calls between a branch in a private network and a branch in a public network, hiding the networks between them?
Correct Answer: A
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How many VoIP G.711 calls can be made simultaneously over a 256-kb/s Frame Relay circuit (Layer 3) if cRTP is enabled and the default IOS voice payload size of 160 is used?
Correct Answer: C
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Which command should you use to configure a T1 CAS trunk to use the most reliable line coding technique?
Correct Answer: A
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Which Session Initiation Protocol server role is given to the component that implements a mechanism to resolve addresses?
Correct Answer: B
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Refer to the exhibit.
How does a switch port that receives marked traffic from a Cisco IP phone use the mls qos trust cos command?
How does a switch port that receives marked traffic from a Cisco IP phone use the mls qos trust cos command?
Correct Answer: A
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If a centralized solution has to be implemented on multiple-equipment vendors devices, which signaling protocol should be used?
Correct Answer: D
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What is the function of TEHO in a path selection strategy?
Correct Answer: B
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Which command is used to assign 20% of the bandwidth of an interface to a traffic class with priority?
Correct Answer: A
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