Download New Latest (May) Cisco 642-437 Actual Tests 21-30

Ensurepass

 

QUESTION 21

DRAG DROP  (Topic 1)

 

 

 

clip_image001

Answer:

clip_image002

 

A.

 

B.

 

C.

 

D.

 

 

Answer:

 

 

QUESTION 22

DRAG DROP  (Topic 1)

 

clip_image003

 

 

Answer:

clip_image004

 

A.

 

B.

 

C.

 

D.

 

 

Answer:

 

 

QUESTION 23

DRAG DROP  (Topic 1)

 

clip_image005

Answer:

clip_image006

 

A.

 

B.

 

C.

 

D.

 

 

Answer:

 

 

QUESTION 24  (Topic 1)

 

The administrator has added a new ephone-dn and a new ephone to the Cisco Unified Communications Manager Express system, but the new phone will not register with the system. If other phones are operating properly, which of the following should the administrator do first to try to resolve the issue?

 

A.

Reboot the router.

B.

Remove the ephone, then re-add the ephone.

C.

Verify that the url authentication is configured for the correct authentication URL.

D.

Verify that the url services is configured to the correct URL for services.

E.

Enter the command no telephony-service, then enter telephony service in global configuration mode.

F.

Enter the command no create cnf-files, then enter create cnf-files under the telephony- service configuration.

 

Answer: F

 

 

QUESTION 25

DRAG DROP  (Topic 1)

 

clip_image007

Answer:

 

 

clip_image008

 

A.

 

B.

 

C.

 

D.

 

 

Answer:

 

 

QUESTION 26  (Topic 1)

 

When Cisco Unified Border Element is configured to support RSVP-based CAC, at which point during call setup are the RSVP path and reservation messages sent and received?

 

A.

The path message is sent immediately after the call setup message is received and the reservation message is received after H.245 capabilities negotiation is completed.

B.

The reservation message is sent immediately after the call setup message is received and the path message is received after H.225 call setup messages have been sent.

C.

The path and reservation messages are sent and received after the H.245 capabilities negotiation is completed.

D.

The path and reservation messages are sent and received immediately after the call setup message is received.

 

Answer: D

Explanation: The H.323 setup is suspended before the destination phone, triggered by the H.225 alerting message, starts ringing. The RSVP reservation
is made in both directions because a voice call requires a two-way speech path and therefore bandwidth in both directions. The terminating gateway ultimately makes the CAC decision based on whether or not both reservations succeed. At that point the H.323 state machine continues either with an H.225 Alerting/Connect (the call is allowed and proceeds), or with an H.225 Reject/Release (call is denied). The RSVP reservation is in place by the time the destination phone starts ringing and the caller hears ringback.

 

 

 

clip_image009

 

 

QUESTION 27  (Topic 1)

 

Which command should be included in order to trust the DSCP-marked traffic from the distribution layer?

 

A.

mls qos trust cos

B.

mls trust dscp-cos

C.

mls qos trust dscp

D.

mls qos trust dscp-cos

 

Answer: C

Explanation: To configure the multilayer switching quality of service port trust state and to classify traffic by examining differentiated services code point (DSCP) value, use the mls qos trust dscp command in interface configuration mode. This will enable the device to trust incoming packets that have DSCP values (the most significant 6 bits of the 8-bit service- type field).

http://www.cisco.com/en/US/products/hw/switches/ps5023/products_tech_note09186a0080 883f9e.shtml

 

 

QUESTION 28

DRAG DROP  (Topic 1)

 

clip_image010

Answer:

clip_image011

 

A.

 

B.

 

C.

 

D.

 

 

Answer:

 

 

QUESTION 29  (Topic 1)

 

Which of the following best describes the implementation challenges that are associated with variable-length numbering plans?

 

A.

the variable number of extensions that need to be implemented

B.

the number of trunks that need to be assigned

C.

the mapping between IP addresses and extension numbers

D.

the identification of the number of digits that need to be dialed before the call is routed

E.

the degree in which the dial plan varies

 

Answer: D

 

 

QUESTION 30  (Topic 1)

 

Calculate how many IP phone calls can be sent across a 64 kbps Frame Relay link that uses the G.729 codec being sampled 50 times a second, 20 bytes a sample, and has 6 bytes of Frame Relay header overhead with no checksum and uses header compression.

 

A.

3

B.

4

C.

5

D.

7

 

Answer: C

Free VCE & PDF File for Cisco 642-437 Real Exam

Instant Access to Free VCE Files: CCNA | CCNP | CCIE …
Instant Access to Free PDF Files: CCNA | CCNP | CCIE …