Get all latest (August) Cisco 640-461 Actual Test 71-80

Ensurepass

 

QUESTION 71

Which user parameter is used as a password when connecting through the telephony user interface?

 

A.

PIN

B.

Passphrase

C.

PassKey

D.

Key ID

Correct Answer: A

 

 

QUESTION 72

On an IP phone line appearance, for which two purposes is the Display parameter designed to be used? (Choose two.)

 

A.

display a number other than the directory number of the IP phone

B.

display a name instead of the directory number of the IP phone

C.

internal caller ID

D.

external caller ID

E.

full directory number ID for outgoing calls

 

Correct Answer: BC

Explanation:

http://cisco.biz/en/US/docs/voice_ip_comm/cucmbe/admin/8_6_1/ccmsys/a03dn.html#wp1100362

 

 

QUESTION 73

What are the two differences between the IntServe and DiffServ models of QoS? (Choose two.)

 

A.

DiffServ provides absolute QoS guarantees.

B.

IntServ is the default QoS mechanism for all routers, because applications signal the router with the QoS level they require.

C.

DiffServ inherits the connection-oriented approach from telephony network design. Every individual communication must explicitly specify its traffic descriptor and requested resources to the network.

D.

With IntServ, packet delivery is guaranteed. However, the use of IntServ can severely limit the scalability of a network.

E.

DiffServ was designed to overcome the limitations of both the best-effort and IntServ models and can provide an “almost guaranteed” QoS.

 

Correct Answer: DE

 

 

QUESTION 74

Which network component would cause variable network delay?

 

A.

dejitter buffer

B.

DSP delay

C.

processing delay

D.

serialization delay

E.

propagation delay

 

Correct Answer: C

 

 

QUESTION 75

Which three characteristics are associated with data? (Choose three.)

 

A.

Greedy

B.

TCP retransmits

C.

UDP priority

D.

delay sensitive

E.

drop insensitive

F.

benign

G.

benign or greedy.

 

Correct Answer: BEG

Explanation:

Data traffic always acknowledge TCP packets for confirm delivery E2E. It is not drop sensitive because it’s not real time traffic.

 

 

QUESTION 76

Refer to the exhibit. Is this configuration correct and is the T1 operational? If not, what is the cause?

 

clip_image002

 

A.

Yes, the configuration is correct and it is operational.

B.

No, the configuration is incorrect and the T1 is not operational because MGCP is not the proper service statement.

C.

No, the configuration is incorrect and the T1 is not operational because, the isdn switch- type is incorrect.

D.

No, the configuration is incorrect and the T1 is not operational because the isdn-bind-13 ccm-manager command is missing from the serial0/0/0:23 interface.

E.

No, the configuration is incorrect and the T1 is not operational because the no ip address command is applied to the serial0/0/0:23 interface.

 

Correct Answer: D

Explanation:

To bind Layer 3 of the ISDN PRI interface of the Media Gateway Control Protocol (MGCP) voice gateway to the Cisco CallManager for PRI Q.931 signaling backhaul support, use the isdn bind-l3 ccm-manager command in interface configuration mode.

http://www.cisco.com/en/US/docs/ios/12_3t/voice/command/reference/vrht_i2_ps5207_TS D_Products_Command_Reference_Chapter.html#wp1094910

 

 

QUESTION 77

Which headers are compressed when cRTP is used?

 

A.

the UDP and RTP headers

B.

the IP header only

C.

the TCP header only

D.

the RTP header only

E.

the IP, UDP, RTP headers and the first byte of the payload

F.

the IP, UDP, and RTP headers

 

Correct Answer: F

Explanation:

Compresses a header at various layers of the Open System Interconnection (OSI) reference model. Examples include Transmission Control Protocol (TCP) header compression, compressed RTP (cRTP), and compressed Internet Protocol/User Datagram Protocol (IP/UDP).

http://www.cisco.com/en/US/tech/tk543/tk762/technologies_tech_note09186a0080108e2c.shtml#head

 

 

QUESTION 78

Which description describes the low latency queuing algorithm?

 

A.

Empty queue 1. If queue 1 is empty, empty queue 2, then empty queue 3, unless a packet for a higher queue arrives.

B.

An administrator defines the traffic classes based on match criteria, including protocols, access control lists, and input interfaces.

C.

A flow-based algorithm that simultaneously schedules interactive traffic to the front of a queue to reduce response time and fairly shares the remaining bandwidth among high-bandwidth flows.

D.

This feature brings strict priority queuing to CBWFQ.

E.

Packets are placed into a single queue and serviced in the order they were received.

 

Correct Answer: D

Explanation:

A & C denotes to weighted fair queue or DWFQ. B denotes to CBWFQ (class based weighted fair queue).

http://www.cisco.com/en/US/docs/ios/12_1/qos/configuration/guide/qcdconmg.html#wp1001019

 

 

 

 

 

 

QUESTION 79

When generating QoS reports in the CAR tool, what two parameters are valid for report generation? (Choose two.)

 

A.

route lists

B.

route patterns/hunt pilots

C.

route groups

D.

gateway types

E.

partitions

F.

IP phone directory numbers

 

Correct Answer: BD

 

 

QUESTION 80

Which type of single switch port can support data and voice VLANs and is recommended for Cisco Unified IP phones?

 

A.

multiflex port

B.

trunk port

C.

access port

D.

ISL trunking port

 

Correct Answer: C

Explanation:

A port on a Cisco switch is either an access port or a trunk port. Access ports belong to a single VLAN and do not provide any identifying marks on the frames that are passed between switches.

 

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