SIP Trunk Configuration Basics CCNP

1. What does SRTP stand for in the context of SIP trunk security?

Secure Real-time Transport Protocol

Session Routing Transfer Protocol

Synchronous Relay Transport Protocol

Service Request Transmission Protocol

2. In Cisco Unified Communications, which protocol handles the actual voice media transport over SIP trunks?

SIP

RTP

TCP

HTTP

3. What is the purpose of the Contact header in SIP messages?

To identify the call destination

To provide the address where future requests should be sent

To encrypt the message body

To log the call duration

4. What is the function of a SIP Proxy Server in trunk deployments?

To store voicemail messages

To route SIP requests and responses between endpoints

To encode voice packets

To manage IP phone configurations

5. What does NAT traversal accomplish in SIP trunk configurations?

Encrypts all signaling traffic

Enables communication across network address translation boundaries

Reduces bandwidth consumption

Prevents call forwarding

6. Which codec is recommended for high-quality voice over SIP trunks?

G.711

G.729

G.723

GSM

7. What is the purpose of SIP REGISTER messages in trunk configuration?

To initiate voice calls

To authenticate and register endpoints with a proxy

To terminate active sessions

To request call status

8. In Cisco Unified Communications, which component acts as a SIP User Agent Server?

IP Phone

CallManager

Voice Gateway

All of the above

9. What does SIP stand for in the context of VoIP communications?

Session Initiation Protocol

Secure Internet Protocol

Synchronous IP Protocol

Service Integration Protocol

10. Which SIP header field identifies the originating party of a call?

To

From

Via

Contact

11. In SIP trunk configuration, what is the purpose of the SIP Route Pattern?

To define which calls use the SIP trunk

To encrypt voice data

To manage IP addresses

To schedule call records

12. What does a SIP 200 OK response indicate?

Call rejected

Call successfully established

Temporary unavailable

Server error occurred

13. Which Cisco Unified Communications component handles SIP trunk termination and signaling?

Cisco Unified CallManager

Cisco Voice Gateway

Cisco IP Phone

Cisco Unified Messaging

14. In SIP, which message type is used to initiate a call session?

INVITE

REGISTER

OPTIONS

BYE

15. What is the primary purpose of a SIP trunk in Cisco Unified Communications?

To encrypt all voice traffic

To connect internal call processing to external VoIP providers

To replace all local PBX systems

To manage video calls only

16. Which transport protocol is commonly used for SIP signaling in enterprise environments?

UDP only

TCP and TLS

SCTP only

IGMP

17. Which protocol is used for secure SIP signaling over TLS?

SIPS

HTTPS

SRTP

DTLS

18. What is the default SIP signaling port for unencrypted connections?

80

443

5060

5061

19. In SIP, the Via header indicates which of the following?

The destination of the message

The path the message took through proxies

The calling party identity

The media codec used

20. Which SIP response code indicates that the called party is temporarily unavailable?

404

486

503

603

CCNP Collaboration SIP Trunk Configuration Basics Quiz