Download New Latest (May) Cisco 642-437 Actual Tests 61-70

Ensurepass

 

QUESTION 61  (Topic 1)

 

What is the reason that an outgoing call succeeds when COR is applied to the incoming dial peer, but no COR is applied to the outgoing dial peer?

 

A.

The COR list for incoming calls on the incoming dial peer is a superset of COR lists for outgoing calls on the outgoing dial peer.

B.

COR lists for incoming calls on the incoming dial peer are not a superset of COR lists for outgoing calls on the outgoing dial peer.

C.

The outgoing dial peer, by default, has the lowest priority.

D.

The incoming dial peer, by default, has the highest COR priority when no COR is applied.

 

Answer: C

 

 

QUESTION 62  (Topic 1)

 

A new Cisco 7965 IP phone is installed on a Cisco Unified Communications Manager Express system. When the phone requests the .loads file from the TFTP server, it sees that the versions are different. What does the IP phone do to resolve this issue?

 

A.

The IP phone requests the SEP<mac>.cfg file and reboots.

B.

The IP phone attempts to obtain the new firmware file image from the TFTP server.

C.

The IP phone boot requests the XMLDefault.cnf.xml file and boots up.

D.

The IP phone does not boot up and will require manual intervention to factory reset the phone before a new firmware image can be downloaded.

 

Answer: B

Explanation: Cisco IP Phone Initialization Process:

1. At initialization, the Cisco IP phone sends a request to the DHCP server to get an IP address, DNS server address, and TFTP server name or address, if appropriate. Options are set in DHCP server (Option 066, Option 150, and so on). It also gets a default gateway address if set in DHCP server (Option 003).

2. If a DNS name of the TFTP sever is sent by DHCP, then a DNS sever IP address is required to map the name to an IP address. This step is bypassed if the DHCP server sends the IP address of the TFTP server. In this case study, the DHCP server sent the IP address of TFTP because DNS was not configured.

3. If a TFTP server name is not included in the DHCP reply, then the Cisco IP phone uses the default server name.

4. The configuration file (.cnf) file is retrieved from the TFTP server. All .cnf files have the name SEP<mac_address>.cnf, where “SEP” is an acronym for Selsius Ethernet Phone. If this is the first time the phone is registering with the Cisco CallManager, then a default file, SEPdefault.cnf, is downloaded to the Cisco IP phone.

5. All .cnf files include the IP address(es) of the primary and secondary Cisco CallManager(s). The Cisco IP phone uses the IP address to contact the primary Cisco CallManager and register.

6.Once the Cisco IP phone has connected and registered with Cisco CallManager, the Cisco CallManager tells the Cisco IP phone which executable version (called a load ID) to run. If the specified version does not match the executing version on the Cisco IP phone, the Cisco IP phone will request the new executable from the TFTP server and reset automatically.

 

http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_tech_note09186a00801 29d92.shtml

 

 

QUESTION 63  (Topic 1)

 

What is the decimal equivalent of the DSCP value AF21?

 

A.

16

B.

17

C.

18

D.

21

 

Answer: C

Explanation: Assured Forwarding (AF) is a means to offer different levels of forwarding assurances for IP packets. Four AF classes are defined, where each AF class is in each DS node allocated a certain amount of forwarding resources(buffer space and bandwidth). Within each AF class IP packets are marked with one of three possible drop precedence values. A congested node tries to protect packets with a lower drop precedence value from being lost by preferably discarding packets with a higher drop precedence value. Classes 1 to 4 are referred to as AF classes. The following table illustrates the DSCP coding for specifying the AF class with the probability. Bits DS5, DS4 and DS3 define the class; bits DS2 and DS1 specify the drop probability; bit DS0 is always zero. he following table illustrates the DSCP coding for specifying the AF class with the probability. Bits DS5, DS4 and DS3 define the class; bits DS2 and DS1 specify the drop probability; bit DS0 is always zero.

 

clip_image001

 

http://www.cisco.com/en/US/tech/tk543/tk757/technologies_tech_note09186a00800949f2.s html

 

 

QUESTION 64  (Topic 1)

 

 

Refer to the exhibit.

 

clip_image002

 

A new Cisco Unified Communications Manager Express system has been deployed and the technician is trying to add the first new IP phone to the system. The phone powers up, but it does not register with the system. The technician has verified that the phone is getting the proper VLAN information from Cisco Discovery Protocol. The phone is also getting the correct IP address and TFTP server address from DHCP. The phone has been assigned to an ephone and the correct MAC address is configured. With the information provided, which two of the following does the administrator need to verify to resolve this situation? (Choose two.)

 

A.

Verify that the ip helper-address is correctly configured.

B.

Verify that telephony-service has been configured.

C.

Verify that the ephone has a button assigned.

D.

Verify that the tftp-server path has been configured.

E.

Verify that the Cisco Unified Communications Manager Express service is running.

F.

Verify that the correct phone type files are in the tftp-server path.

 

Answer: DF

Explanation: Since the phone is getting the correct TFTP address, the next thing that needs to be verified is the TFTP Server path and IP Reachablity for the IP Phone to the TFTP Server. Once the TFTP settings has been verified, check if the files mentioned in the termxx.defaults.loads file is available in the TFTP Server for the phone to download. http://www.cisco.com/en/US/docs/voice_ip_comm/cuipph/7960g_7940g/7_0/sip/english/ad ministration/guide/7960trbS.html

 

 

QUESTION 65  (Topic 1)

 

Refer to the exhibit.

 

 

 

clip_image003

 

Cisco Unified Communications Manager Express has been partially configured to support 6 IP phones and 12 directory numbers. The Cisco Unified Communications Manager Express will use the IP address 10.1.130.1/24. Which two elements of the configuration are missing from the command output and need to be added so that phones do not auto-register, but can manually register with Cisco Unified Communications Manager Express? (Choose two.)

 

A.

ip address 10.1.130.1

B.

no reg-ephone

C.

create profile

D.

ip source-address 10.1.130.1

E.

create cnf-files

F.

no auto-reg-ephone

 

Answer: DF

Explanation: To identify the IP address and port through which IP phones communicate with a CiscoUnifiedCME router, use the ip source-address command in telephony-
service or group configuration mode. This command enables a router to receive messages from CiscoUnifiedIPphones through the specified IP address and port. The CiscoUnifiedCME router cannot communicate with CiscoUnifiedCME phones if the IP address of the port to which they are attached is not configured.

 

Normally when you configure basic telephony-service parameters, then phone can register with CME although no DN will be assigned to them. You can disable this by using the no auto-reg-ephone command. After this command the phone which will try to register will receive message “Registration Rejected: No configuration entry…..”.. When automatic registration is blocked, CiscoUnifiedCME records the MAC addresses of phones that attempt to register but cannot because they are blocked. http://www.cisco.com/en/US/docs/voice_ip_comm/cucme/command/reference/cme_a1ht.ht ml#wp1031242

 

 

QUESTION 66  (Topic 1)

 

What is the function of class-based marking?

 

A.

Marking packets is based only on CoS value, IP precedence value or DSCP value allows Layer 3 frames to be identified and distinguished from other packets.

B.

Marking frames based only on CoS value or IP precedence value allows Layer 2 frames to be identified and distinguished from other frames.

C.

Marking frames or packets sets information in the Layer 2 and Layer 3 headers of a packet so that the frame or packet can be identified and distinguished from other frames or packets in the same traffic flow.

D.

Marking frames only sets information in the Layer 2 headers of a frame so that the frame can be identified and distinguished from other packets or frames.

E.

Marking allows network devices to classify a packet or frame, based on a specific traffic descriptor.

 

Answer: E

 

 

QUESTION 67  (Topic 1)

 

You are configuring a network to support voice to the PSTN. One important aspect to the configuration is to be able to determine the individual slot, subunit, and port number from the gateway endpoint identifier. Which signaling protocol is appropriate for this situation?

 

A.

H.323

B.

SIP

C.

SCCP

D.

MGCP

 

Answer: D

Explanation: Endpoints are any of the voice ports on the designated gateway. These voice ports provide connectivity to both analog ports and digital trunks to the PSTN. Ports on gateways are identified by endpoints in very specific ways. It is important to note that gateways can have multiple endpoints dependent on the number of ports it contains, and that the endpoints are case insensitive. A sample MGCP endpoint addressing scheme is provided below.

 

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http://www.cisco.com/en/US/tech/tk1077/technologies_tech_note09186a00801da84e.shtml

 

 

QUESTION 68  (Topic 1)

 

When a Cisco Unified Border Element connects two VoIP streams using flow-around media, which of the following options describes the components of the call that flow around and the components that flow through the device?

 

A.

All security information flows through the Cisco Unified Border Element, and all call signaling and RTP flows around the device.

B.

Call signaling flows through and call media flows around the device.

C.

Call media flows through and call signaling flows around the device.

D.

The initial call-signaling traffic flows through the device to initiate the call and then all subsequent calls flow around the device.

 

Answer: B

 

 

QUESTION 69  (Topic 1)

 

A small office needs to provide outbound dialing and in-bound DID without the cost of a T1 circuit. All signaling is loop start. Which analog port configuration will support these requirements?

 

A.

voice-port 0/0/0

description fxs-did

signal did loop-start

!

voice-port 0/1/0

description fxo

signal loop-start

!

dial-peer voice 1 pots

incoming called-number .

direct-inward-dial

port 0/0/0

!

 

 

dial-peer voice 90 pots

destination-pattern 9T

port 0/1/0

B.

voice-port 0/0/0

signal loop-start

!

voice-port 0/1/0

signal loop-start

!

dial-peer voice 1 pots

incoming called-number T

direct-inward-dial

!

dial-peer voice 90 pots

destination-pattern 9T

port 0/1/0

C.

voice-port 0/1/0

signal did loop-start

!

dial-peer voice 1 pots

incoming called-number .

!

dial-peer voice 90 pots

destination-pattern 9T

port 0/1/0

D.

voice-port 0/0/0

signal did loop-start

!

dial-peer voice 1 pots

incoming called-number .

direct-inward-dial

!

dial-peer voice 90 pots

destination-pattern 9T

port 0/0/0

 

Answer: A

 

 

QUESTION 70  (Topic 1)

 

When deploying an 802.3af switch what is the default number of Watts consumed by each port if 802.3af compliant devices are attached to the switch?

 

A.

4 Watts

B.

6.3 Watts

C.

7 Watts

D.

15.4 Watts

E.

22.3 Watts

 

Answer: D