Download New Latest (May) Cisco 642-437 Actual Tests 51-60

Ensurepass

 

QUESTION 51

DRAG DROP  (Topic 1)

 

Drop

 

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Answer:

 

 

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A.

 

B.

 

C.

 

D.

 

 

Answer:

 

 

QUESTION 52

DRAG DROP  (Topic 1)

 

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Answer:

 

 

clip_image004

 

A.

 

B.

 

C.

 

D.

 

 

Answer:

 

 

QUESTION 53  (Topic 1)

 

If a packet is marked with an IP precedence value of 011, what is the corresponding binary DSCP class-selector value?

 

A.

000011

B.

011110

C.

011000

D.

011010

E.

011100

 

Answer: C

 

 

QUESTION 54  (Topic 1)

 

Refer to the exhibit. Callers dial 0 to reach an outside line. When they try to place calls to directory services (322) or services (422), they hear the reorder tone. What needs to be edited in the dial peer to allow these calls to complete successfully?

 

clip_image005

 

A.

The destination pattern is incorrect. It needs to start with a 9.

B.

A “prefix 1” statement needs to be added to the dial-peer configuration.

C.

The forward-digits all command needs to be applied to the dial peer.

D.

The destination pattern needs to be edited so that the first digit that is matched is a 0.

E.

The destination pattern needs to be edited so that the first digit that is matched is a 0 and the forward-digits all command needs to be added to the dial peer.

F.

The destination pattern needs to be edited so that the first digit that is matched is a 1 and the forward-digits all command needs to be added to the dial peer.

G.

The destination pattern needs to be edited so that the first digit that is matched is a 0 and the forward-digits 3 command needs to be added to the dial peer.


 

Answer: G

Explanation: Since the callers dial 0 before any actual number to go outside line, they should have a destination pattern starting with 0 to place a successful call to directory services or other services. The forward-digits command controls the number of digits that are stripped before the dialed string is passed to the telephony interface. On outbound POTS dial peers, the terminating router normally strips off all digits that explicitly match the destination pattern in the terminating POTS dial peer. Only digits matched by the wildcard pattern are forwarded. The forward-digits command can be used to forward a fixed number of dialed digits, or all dialed digits, regardless of the number of digits that explicitly match the destination pattern.

http://www.cisco.com/en/US/docs/ios/12_3/vvf_c/dial_peer/dp_confg.html#wp1067010

 

 

QUESTION 55

DRAG DROP  (Topic 1)

 

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Answer:

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A.

 

B.

 

C.

 

D.

 

 

Answer:

 

 

QUESTION 56  (Topic 1)

 

Refer to the exhibit. Your company’s QoS policy states that all traffic that is arriving at access layer switches from IP phones should be marked with a DSCP value of 46 and that all untagged traffic that is arriving from a PC that is attached to an IP phone should be marked with a CoS value of 1. Which two options will satisfy the requirements for the CoS- to-DSCP map and are the correct QoS commands? (Choose two.)

 

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A.

mls qos 1

B.

mls qos map cos-dscp 0 10 18 26 34 46 48 56

C.

mls qos cos 1

D.

mls qos map dscp 0 8 16 26 32 40 48 56

E.

mls qos map cos 0 8 18 26 40 48 50 56

F.

mls qos dscp 1

 

Answer: BC

Explanation:To define the ingress Class of Service (CoS)-to-differentiated services code point (DSCP) map for trusted interfaces, use the mls qos map cos-dscp command in global configuration mode.

mls qos map cos-dscp dscp1…dscp8

dscp1…dscp8 – Defines the CoS-to-DSCP map. For dscp1…dscp8, enter eight DSCP values that correspond to CoS values 0to 7. Separate consecutive DSCP values from each other with a space. The supported DSCP values are 0, 8, 10, 16, 18, 24, 26, 32, 34, 40, 46, 48, and 56.

To define the default multilayer switching (MLS) class of service (CoS) value of a port or to assign the default CoS value to all incoming packets on the port, use the mls qos cos command in interface configuration mode.

mls qos cos cos-value

cos-value – Assigns a default CoS value to a port. If the port is CoS trusted and packets are untagged, the default CoS value is used to select one output queue as an index into the CoS-to-DSCP map. The CoS range is 0 to 7. The default is 0. http://www.cisco.com/en/US/docs/ios/qos/command/reference/qos_m2.html#wp1041343

 

 

QUESTION 57  (Topic 1)

 

Which three methods are used by a Cisco Unified Border Element to provide network hiding? (Choose three.)

 

A.

Back-to-back user agent, replacing all SIP-embedded IP addressing

B.

IP network security boundary

C.

media flow-through

D.

RSVP

E.

IP network privacy

F.

Intelligent IP address translation for RTP flows

 

Answer: BEF

 

 

QUESTION 58  (Topic 1)

 

Which of the following describes SIP Early Offer?

 

A.

In SIP Early Offer mode, the SDP media capabilities are sent in the INVITE message of the calling device.

B.

SIP Early Offer always uses session indicator 183.

C.

In SIP Early Offer mode, the SDP media capabilities are sent in the 200 OK messages of the calling device.

D.

In SIP Early Offer mode, the INVITE and the 200 OK messages use non-SDP message format to indicate SIP Early Offer

 

Answer: A

 

 

QUESTION 59  (Topic 1)

 

You have a Cisco Unified Border Element configured to provide H.323 to SIP interworking. Which command will verify that you have a single H.323 and a single SIP call leg when the call is placed?

 

A.

show call active voice

B.

debug voip ipipgw

C.

show dialpeer voice

D.

debug voice dialpeer

 

Answer: A

Explanation: The show call active voice command allows you to display the contents of the active call table. The show call active voice command displays data from the plain old telephone service (POTS) and VoIP call legs on the voice gateway. The information presented includes call times, dial peers, connections, quality of service parameters, and gateway handling of jitter. This information can be useful when you troubleshoot a range of voice quality problems.

http://www.cisco.com/en/US/docs/ios/voice/cube/configuration/guide/vb-gw- h323sip.html#wp1342172

 

 

QUESTION 60  (Topic 1)

 

Which QoS methodology combines strict priority queuing with class-based weighted fair queuing?

 

A.

IP RTP Priority

B.

Multilink PPP

C.

IP Frame Relay RTP Priority

D.

RSVP

E.

LLQ

 

Answer: E