Cisco 642-437 Online Practice Questions and Exam Preparation

Cisco 642-437 Online Questions & Answers

• Question 111:

  Which three are primary applications for classifying data on the network using QoS? (Choose three.)

  A. transactional applications
  B. any applications
  C. best-effort applications
  D. mission-critical applications
  E. World Wide Web applications
  F. database applications
  A. transactional applications
  C. best-effort applications
  D. mission-critical applications

• Question 112:

  Which four are benefits of VLANs in an organization? (Choose four.)

  A. increased performance
  B. improved manageability
  C. better VLAN database
  D. quick response to ping times
  E. physical topology independence
  F. better LAN infrastructure
  G. switch is able to reboot faster
  H. increased security
  A. increased performance
  B. improved manageability
  E. physical topology independence
  H. increased security

• Question 113:

  Click and drag the feature on the left to the category it belongs to on the right.

  Select and Place:

  

  

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  Gateway Functionality : Gateways are responsible Media stream handling and speech path integrity, DTMF relay, Fax relay and pass-through, Digit translation and call processing, Dial peers and codec filtering, Carrier ID handling, Termination and re-origination of signaling and media The Cisco Unified Border Element is a session border controller designed to provide easy, secure, and cost-effective connectivity between independent unified communications networks or network domains for different enterprises. It provides interconnection between incompatible applications within the enterprise network, between different enterprises for business-to-business applications, and between enterprise networks and service provider Session Initiation Protocol (SIP) trunks. The Cisco Unified Border Element provides key session management capabilities, H.323 and SIP interworking functions, and network-to-network interface security and demarcation capabilities. It performs most of the same functions of a public switched telephone network (PSTN)-to-IP gateway but joins two VoIP call legs. Media packets can either flow through (thus hiding the networks from each other) or around the Cisco Unified Border Element platform http://www.cisco.com/en/US/docs/ios/voice/cube/configuration/guide/vb-gwoverview_ps10591_TSD_Products_Configuration_Guide_Chapter.html

• Question 114:

  Which Cisco Unified Communications Manager component provides direct digital-to-digital conversion from one codec to another?

  A. media termination point
  B. media converter
  C. digital signal processor
  D. coder
  C. digital signal processor

• Question 115:

  Drag the appropriate IOS commands from the left and drop them in the spaces on the right to create a dial peer that will match all in bound calls and prevent two dialing on a T1PRI circuit. Not all boxes are used and not all options are used.

  Select and Place:

  

  

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  In the case of Digital Interfaces, when the PBX or central office (CO) switch sends a setup message that contains all the digits necessary to fully route the call, those digits can be mapped to an outbound Voice over IP (VoIP) dial-peer (or hairpin to plain old telephone service (POTS) dial-peer directly). The router/gateway does not present a secondary dial tone to the caller and does not collect digits. It forwards the call directly to the configured destination. In the case of analog interfaces, the user only hears the dial tone once (either local or remote), and then dials the digits and gets through to the destination phone. This is called one stage dialing. When one receives an inbound call from a POTS interface, the Direct Inward Dial (DID) feature in dial-peers enables the router/gateway to use the called number (dialed number identification service (DNIS)) to directly match an outbound dial-peer. When DID is configured on the inbound POTS dial-peer, the called number is automatically used to match the destination pattern for the outbound call leg. The incoming called number command will match the dialpeer that has the DID configured. http://www.cisco.com/en/US/tech/tk652/tk698/technologies_tech_note09186a00800e00d0.shtml

• Question 116:

  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 H.323-embedded IP addressing
  B. IP network security boundary
  C. Media flow-through
  D. RSVP
  E. IP network privacy and topology hiding
  F. Intelligent IP address translation for RTP flows
  B. IP network security boundary
  E. IP network privacy and topology hiding
  F. Intelligent IP address translation for RTP flows

  ---

  Cisco Unified Border Element can protect the network by hiding the network addresses and names for both the access (customer) side and the backbone (network core) side. A CUBE is de- signed to provide IP network privacy and topology hiding, IP network security boundary, Intelligent IP address translation for call media and signaling, Back-to-back user agent, replacing all SIP-embedded IP addressing, History information based topology hiding and call routing.

  http://www.cisco.com/en/US/docs/routers/asr1000/configuration/guide/sbc/sbc_topology_hide.ht ml

• Question 117:

  Which three Cisco IOS commands are required to configure a voice gateway as a DHCP server to support a data subnet with the IP address of 10.1.30.0/24 and a default gateway of 10.1.30.1/24? (Choose three.)

  A. ip dhcp pool
  B. subnet 10.1.30.1 255.255.255.0
  C. ip dhcp pool data
  D. network 10.1.30.1/24
  E. network 10.1.30.0 255.255.255.0
  F. default-gw 10.1.30.1/24
  G. default-router 10.1.30.1
  C. ip dhcp pool data
  E. network 10.1.30.0 255.255.255.0
  G. default-router 10.1.30.1

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  1) To configure the DHCP address pool name and enter DHCP pool configuration mode, use the following command in global configuration mode:

  Router(config)# ip dhcp pool name - Creates a name for the DHCP Server address pool and places you in DHCP pool configuration mode

  2) To configure a subnet and mask for the newly created DHCP address pool, which contains the range of available IP addresses that the DHCP Server may assign to clients, use the following command in DHCP pool configuration mode:

  Router(dhcp-config)# network network-number [mask | /prefix-length] - Specifies the subnet network number and mask of the DHCP address pool. The prefix length specifies the number of bits that comprise the address prefix. The prefix is

  an alternative way of specifying the network mask of the client. The prefix length must be preceded by a forward slash (/).

  3) After a DHCP client has booted, the client begins sending packets to its default router. The IP address of the default router should be on the same subnet as the client. To specify a default router for a DHCP client, use the following

  command in DHCP pool configuration mode:

  Router(dhcp-config)# default-router address [address2 ... address8] - Specifies the IP address of the default router for a DHCP client. One IP address is required; however, you can specify up to eight addresses in one command line.

  http://www.cisco.com/en/US/docs/ios/12_2/ip/configuration/guide/1cfdhcp.html#wp1000999

• Question 118:

  What is the function of TEHO in a path selection strategy?

  A. Allows users to place an intersite call by dialing a site code.
  B. Uses the WAN link for call routing to avoid PSTN charges.
  C. Uses the WAN link for call routing to avoid PSTN charges; in addition, the PSTN breakout should be as close as possible to the final PSTN destination.
  D. Defines each site with a unique site code.
  C. Uses the WAN link for call routing to avoid PSTN charges; in addition, the PSTN breakout should be as close as possible to the final PSTN destination.

• Question 119:

  Assume a SIP voice network. Drag each characteristic to the type of SIP call setup the characteristics best describes.

  Select and Place:

  

  

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  Direct call setup:

  +

  Nonscalable

  +

  UA must keep data on large number of destinations

  +

  Relies on cached information to resolve addresses

  Redirect Server Call Setup:

  + Server reports back to a UA with destination coordinates

  Proxy Server Call Setup:

  +

  Most dynamic address resolution capability

  +

  All setup messages to through server

  +

  UA incapable of establishing its own sessions http://www.cisco.com/en/US/tech/tk652/tk701/technologies_configuration_guide_chapter09186a0080163444.html

• Question 120:

  Which command should you use to associate a Session Initiation Protocol phone using a tag of 1 with a directory number with a tag of 20?

  A. button 1:20
  B. button 20:1
  C. number 20 dn 1
  D. number 1 dn 20
  D. number 1 dn 20