Chapter Review Questions

The following questions test your knowledge of topics explained in this chapter. You can find the answers to the questions in Appendix A, "Answers to Chapter Review Questions."

1.	Which three of the following are examples of VoIP call control protocols? SIP RSVP Megaco SAP SGBP
2.	Which two functions are associated with CDRs? Bandwidth management Troubleshooting Billing User support Capacity planning
3.	In H.323 call establishment, which channel do endpoints use to communicate with the gatekeeper? B-channel RAS channel Forward channel In-band control channel
4.	The following command is configured on a gatekeeper: zone remote gk-zone2.test.com test.com 10.52.218.46 1719 What is the function of this command? Defines a technology prefix Defines the identity and IP address of a neighboring gatekeeper Defines the identity and IP address of the local gatekeeper Defines the IP address of the gateway to which default calls will be forwarded
5.	Which four of the following are SIP servers? Registrar Gateway Redirect Location Proxy
6.	What does the session target sip-server dial peer subcommand do? It tells the router to use DNS to resolve sip-server. It tells the router to use the server identified in the SIP UA configuration. It tells the router to use SIP as the session protocol. This is invalid syntax, and an error will be generated.
7.	Which call control model is used by MGCP? Distributed Centralized Ad-hoc Hybrid
8.	How do you configure a router to use MGCP on a digital port? Add the application mgcpapp subcommand to the dial peer. Add the service mgcp subcommand to the dial peer. Add the parameter application mgcpapp to the ds0-group controller subcommand. Add the service mgcp parameter to the ds0-group controller subcommand.
9.	Which call control model's encoding is more compact but harder to decode and troubleshoot? H.323 SGCP SIP MGCP
10.	MGCP supports which of these requirements? Integration with instant messaging Distributed call processing Scalability through the use of proxy servers, redirect servers, registrar servers, and location servers Call processing controlled from a central server with no intelligence at the endpoints