Multiple choice questions

Book: Fundamentals of Communications and Networking

 

 

Chapter 10 Assessment
1. VoIP refers to all systems that implement digital telephony over the IP network.
A. True B. False
2. What is the first step in setting up a VoIP call?
A. Media channel setup
B. Signaling
C. Digitize the analog voice signal
D. Transmit packets on the IP network
3. Which of the following statements represents one of the main advantages of VoIP?
A. Overall network usage is decreased
B. VoIP is more secure than traditional
telephone systems
C. VoIP is designed to run on existing
IP network infrastructure
D. Endpoints are compatible with PSTN
and VoIP
4. Which of the following devices allow multiple legacy analog phones to connect to an IP network?
A. ATA B. Gatekeeper C. MCU D. VoIP gateway
5. Which protocol was the original signaling protocol for VoIP?
A. SIP B. RTP C. H.323 D. IMS
6. At which IMS layer do Call Session Control Function (CSCF) servers operate?
A. Application B. Control C. Transport D. Device 7. ________ is a signaling protocol from the IETF that is widely used to control communication sessions
over IP networks.
8. The RTP specification defines which two protocols? (Select two).
A. RTP B. SRTP C. SDP D. RTCP
9. Which protocol defines streaming media attributes and parameters and is used to describe
multimedia sessions?
A. SIP B. H.323 C. UDP D. SDP 10. Which of the following terms is a measure of how successful a network is at meeting packet
delivery timing and error rate goals?
A. Latency B. Jitter C. QoS D. Error rate
11. The variable delay that causes gaps in a conversation due to uneven data flow is called ________ .
12. Which common PSTN traffic do VoIP systems not handle well?
A. Voice B. Video C. Fax D. File transfer Chapter 11 Assessment
1. The definition of UC is not the same in all situations.
A. True B. False
2. The Session Initiation Protocol (SIP) is documented primarily in which Request for Comments (RFC)?
A. RFC 2520 B. RFC 791 C. RFC 3261 D. RFC 3265
3. Which of the following are generations of signaling in the traditional telephony network? (Select
two.)
A. Digital Switching B. IN C. AIN D. TIP and RING
4. Which of the following are possible types of SIP gateways? (Select three.) A. Dial Plan B. Session Border Controller (SIP-SIP) C. SIP-Trunking D. Domain Name Service (DNS) E.
Application
5. Which of the following affect the quality of [user] experience?
A. Grounding B. Packet loss C. Delay variation D. A and B only E. None of the above
6. Desired quality of service in IP networks is signaled by ________.
7. Big bandwidth traffic engineering ________.
A. Provides “big pipes” resulting in low utilization
B. Optimizes QoS using TOS bits and prioritization
C. Manages TOS bits for prioritization and QoE
D. Does not take QoE into effect
8. Managed bandwidth traffic engineering ________.
A. Doesn’t take QoE into effect
B. Provides “big pipes” resulting in
low utilization
C. Is used for Service Level Agreement
purposes only
D. Optimizes QoS using TOS bits and
prioritization
9. When a SIP UA is initialized, it usually ________.
A. Registers with the SIP server/registrar
B. Uses Address Resolution Protocol to map
its URI to a MAC address
C. Uses Address Resolution Protocol to map its URI to an IP address
D. Sends an Internet Control Message Protocol
10. request for its URI URI stands for ________. 11. Presence in UC means ________.
A. How near one resource is to another
B. The geolocation of a human or
nonhuman resource
C. The availability or unavailability
of a human or nonhuman resource
(such as a conference room)
D. The way that a subscriber would like
their calls to be handled
12. There are three phases of a UC call. They are ________.
A. Call setup, information transfer, and call teardown
B. Initialization, transfer, and de-initialization
C. SS7, IN, and AIN
D. Start phase, transfer phase, and shut-down
phase
13. The Layer 4 protocol used most often with SIP is ________.
A. Internet Protocol version 4 (IPv4)
B. User Datagram Protocol (UDP)
C. Transmission Control Protocol (TCP) D. Internet Protocol version 6 (IPv6)
14. Preference allows ________.
A. A subscriber to direct a UC system on how to handle incoming communications
B. Geolocation of a human or nonhuman resource (such as a conference room) in three-dimensional
space
C. Routers to determine the shortest path first for any particular UCUC message
D. None of the above
15. UC is specified in ________.
A. RFC 3621
B. RFC 791 B. RFC 3625
C. None of the above

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• 1493346145-Chapter 10 11 Assessment.docx