IMS BASED SERVICES

E4-E5 CFA
IMS BASED SERVICES
Q. 1 , What are operators looking for in response to new business opportunities?

A. Quick and flexible ways to respond

B. Cheaper call rates

C. Multimedia services

D. Increased subscriber base

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Q. 2 , What is the goal of operators in delivering seamless and consistent user experiences?

A. To increase revenue

B. To charge on the basis of value

C. To reduce service creation and provisioning costs

D. To meet user needs for ease-of-use, manageability and seamless access

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Q. 3 , How do operators want to charge for service bundles?

A. On the basis of time

B. On the basis of volume

C. On the basis of value

D. On the basis of content

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Q. 4 , What is a key way to retain subscribers according to the text?

A. Offering cheap or free calls

B. Personalization and service bundling

C. Reducing call charges in the short term

D. Strengthening the customer relationship

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Q. 5 , What is IMS?

A. An architectural framework for delivering IP multimedia to mobile users

B. An approach to delivering Internet services over GPRS

C. A tool for operators to enable the creation and delivery of PS-based person-to-person MM services

D. A common core, enablers, support systems and interworking functions enabling operators and service providers to leverage on installed legacy networks

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Q. 6 , What problem does the IMS architecture solve?

A. Subscriber churn

B. Service creation and provisioning costs

C. Quality of service

D. Service scalability

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Q. 7 , What is the core offering of IMS?

A. Personalization and service bundling

B. Support to compose services and expand existing services

C. A common core, enablers, support systems, and interworking functions

D. Differentiation in areas like co-branding, business-to-business relations, tariffs, single sign-on, and quality of service

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Q. 8 , What is the layered architecture of IMS?

A. An application layer, a control layer, and a connectivity layer

B. An application layer, a transmission layer, and a service layer

C. A transmission layer, a control layer, and an access layer

D. An access layer, a service layer, and a connectivity layer

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Q. 9 , What is the benefit of the layered architecture in IMS?

A. It allows each layer to evolve independently as market and technology demands change.

B. It makes the upper layers independent of the transmission technology in the connectivity layer.

C. It supports the migration to new transmission technologies.

D. All of the above.

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Q. 10 , What is the original formulation of IMS?

A. An approach to delivering Internet services over GPRS

B. An architectural framework for delivering IP multimedia to mobile users

C. A tool for operators to enable the creation and delivery of PS-based person-to-person MM services

D. A common core, enablers, support systems and interworking functions enabling operators and service providers to leverage on installed legacy networks

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Q. 11 , What is the goal of IMS according to the text?

A. To standardize applications

B. To aid the access of multimedia and voice applications across wireless and wireline terminals

C. To provide converged multimedia services across multiple accesses

D. To support networks other than GPRS, such as Wireless LAN, CDMA2000 and fixed line making IMS access independent

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Q. 12 , What protocols does IMS use as far as possible?

A. Wireless protocols

B. Internet protocols

C. Transmission protocols

D. Access protocols

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Q. 13 , What are operators looking for in response to new business opportunities?

A. Slow and inflexible ways

B. Quick and flexible ways

C. Slow and rigid ways

D. None of the above

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Q. 14 , What do operators want to deliver to users?

A. A seamless and consistent user experience

B. A complicated and inconsistent user experience

C. A limited user experience

D. None of the above

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Q. 15 , What do operators need to be able to charge for?

A. Value

B. Time

C. Volume

D. A and B

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Q. 16 , What must be easy for operators to create, implement and charge for?

A. Service bundles that attract repeated use over an extended period

B. Service bundles that are difficult to use

C. Service bundles that have limited access

D. None of the above

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Q. 17 , What must the services meet in order to satisfy user needs?

A. Ease-of-use

B. Manageability

C. Seamless access

D. All of the above

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Q. 18 , What is one key way to attract and retain subscribers?

A. Offer differentiation in areas like personalization, service bundling, and quality of service

B. Offer limited services

C. Offer the same services as competitors

D. None of the above

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Q. 19 , What is another key way to retain subscribers?

A. Build on and strengthen the customer relationship

B. Provide limited services

C. Offer services that competitors offer

D. None of the above

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Q. 20 , What does IMS offer?

A. Standardized service enablers and network interfaces that make interoperability of new MM services easier to achieve

B. A tool for operators to enable the creation and delivery of PS based person-to-person MM services

C. Both A and B

D. None of the above

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Q. 21 , How does IMS solve service scalability?

A. By offering support to compose services and expand existing services

B. By limiting the number of services that can be offered

C. By offering only basic services

D. None of the above

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Q. 22 , What is the core of IMS?

A. Combining the best of two worlds: datacom industry & telecom industry

B. Offering basic services

C. Offering limited services

D. None of the above

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Q. 23 , What does IMS consist of?

A. A common core, enablers, support systems, and interworking functions

B. Only a common core

C. Only enablers

D. None of the above

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Q. 24 , What does IMS enable operators and service providers to leverage on?

A. Installed legacy networks

B. New transmission technologies

C. Both A and B

D. None of the above

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Q. 25 , What is the IMS architecture based on?

A. A layered architecture

B. A horizontal architecture

C. A vertical architecture

D. None of the above

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Q. 26 , What does IMS stand for?

a) Internet Messaging Service

b) Internet Multimedia Subsystem

c) Internet Management System

d) Intelligent Messaging System

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Q. 27 , Who standardized the IMS initially?

a) 3rd Generation Partnership Projects (3GPP)

b) WiMax Forum

c) IEEE

d) Internet Engineering Task Force (IETF)

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Q. 28 , Which release of 3GPP added inter-working with WLAN?

a) Release 4

b) Release 5

c) Release 6

d) Release 7

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Q. 29 , What is the IMS designed to support?

a) Media Layer for packet based services

b) Control Layer for packet based services

c) Bearer services of the Access Network

d) Both a and c

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Q. 30 , In a multi-access environment, what does IMS ensure?

a) Availability to selected Access Networks

b) Service availability to all Access Networks

c) Limited access to Access Networks

d) None of the above

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Q. 31 , What protocol does IMS use to support signaling and session control for real-time services?

a) TCP

b) UDP

c) SIP

d) HTTP

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Q. 32 , How many groups of elements can IMS nodes be split into?

a) 2

b) 3

c) 4

d) 5

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Q. 33 , What are the three groups of IMS nodes?

a) Database Elements, Control Elements, and User Elements

b) Database Elements, Control Elements, and Media Elements

c) Control Elements, User Elements, and Network Elements

d) Database Elements, Media Elements, and Network Elements

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Q. 34 , What is the main database element in IMS?

a) HLR

b) VLR

c) HSS

d) MSC

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Q. 35 , What is the function of the HSS?

a) Subscriber data and authentication data

b) Location Register

c) IMS Service Profile Processing

d) All of the above

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Q. 36 , Which IMS database element is accessed by the I-CSCF and S-CSCF to obtain which HSS stores the user data when more than one HSS is present in the network?

a) HLR

b) VLR

c) HSS

d) SLF

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Q. 37 , What is a CSCF?

a) A database element

b) A network element

c) A SIP server

d) An access network

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Q. 38 , What are the three types of CSCFs?

a) S-CSCF, P-CSCF, and I-CSCF

b) S-CSCF, P-SGSN, and I-CSCF

c) S-CSCF, P-GGSN, and I-CSCF

d) S-CSCF, P-BSC, and I-CSCF

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Q. 39 , What does S-CSCF stand for?

a) Serving Call Session Control Function

b) Serving Connection Session Control Function

c) Service Call Session Control Function

d) Service Connection Session Control Function

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Q. 40 , What is the main function of the S-CSCF?

a) To authenticate users

b) To maintain session states for registered users’ on-going sessions

c) To enforce the rule set for services based on the general policy of the operator and the user’s subscription parameters

d) All of the above

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Q. 41 , What is the role of the S-CSCF in service request handling?

a) It decides on the handling of service requests from the user based on the user’s profile

b) It forwards service requests to the appropriate Application Server either based on the user’s profile or based on the operator’s local policy

c) Both a) and b)

d) None of the above

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Q. 42 , Where is the S-CSCF always located?

a) In the visited network

b) In the home network

c) In the IMS network

d) In the access network

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Q. 43 , Can there be several S-CSCFs in the network?

a) Yes, there can be several S-CSCFs in the network.

b) No, there can only be one S-CSCF in the network.

c) It depends on the capabilities of the nodes or the capacity requirements of the network.

d) It depends on the operator’s local policy.

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Q. 44 , How does the I-CSCF allocate the S-CSCF for a user?

a) Based on the services requested

b) Based on the capabilities of the mobile

c) Based on the user’s profile

d) All of the above

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Q. 45 , What is the advantage of the S-CSCF architecture?

a) The visited IMS network provides the services and service features

b) The user is restricted to the capabilities of the visited IMS network

c) The user’s configurations are always the same and are always provided by the home network operator

d) None of the above

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Q. 46 , What is the role of an S-CSCF in session control services for a user?

a) To maintain session states for registered users’ on-going sessions

b) To relay SIP requests and responses between calling and called parties

c) To act as a SIP Registrar to accept users’ SIP registration requests

d) All of the above

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Q. 47 , What is the function of an S-CSCF as a Proxy Server?

a) To maintain session states for registered users’ on-going sessions

b) To relay SIP requests and responses between calling and called parties

c) To act as a SIP Registrar to accept users’ SIP registration requests

d) All of the above

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Q. 48 , What is the role of an S-CSCF as an interface to application servers?

a) To maintain session states for registered users’ on-going sessions

b) To relay SIP requests and responses between calling and called parties

c) To act as a SIP Registrar to accept users’ SIP registration requests

d) To act as the interface to application servers and other IP or legacy service platforms

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Q. 49 , What is the function of the P-CSCF in the IMS network?

a) To act as a hiding entity within the home network

b) To query the HSS and find the location of the S-CSCF

c) To establish a security association with the user and validate all session requests

d) To act as the entry point towards the IMS network from any access network

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Q. 50 , How is the P-CSCF allocated to a user in the case of UMTS/GPRS?

a) By the GGSN in the PDP activation message

b) Through a DHCP query made by the user

c) By the access network configuration

d) By the I-CSCF in the home network

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Q. 51 , Which SIP message does the P-CSCF send towards the corresponding I-CSCF after receiving a registration query?

a) SIP INVITE

b) SIP ACK

c) SIP REGISTER

d) SIP BYE

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Q. 52 , What is the function of the Policy Decision Function (PDF) in the P-CSCF?

a) To establish a security association with the user

b) To authorize the use of bearer and QoS resources within the access network for IMS services

c) To maintain the knowledge of the ‗SIP Server‘ associated to the user

d) To forward SIP messages from the network to a mobile

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Q. 53 , What is the role of the I-CSCF in the home network?

a) To act as the entry point towards the IMS network from any access network

b) To query the HSS and find the location of the S-CSCF

c) To establish a security association with the user and validate all session requests

d) To serve as a central contact point for all sessions destined to a subscriber of that network or a roaming user currently visiting that network

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Q. 54 , How does the I-CSCF select an S-CSCF for a user's session?

a) Based on the user's capabilities

b) Based on the location of the user's P-CSCF

c) Based on the location of the S-CSCF

d) All of the above

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Q. 55 , What is the main job of the I-CSCF in the home network?

a) To act as the entry point towards the IMS network from any access network

b) To query the HSS and find the location of the S-CSCF

c) To establish a security association with the user and validate all session requests

d) To select an S-CSCF for a user's session and route SIP requests to it

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Q. 56 , What does the I-CSCF do in order to mask the internal configuration of the home network's environment from external interrogating devices?

a) It acts as a hiding entity into a home network's IM subsystem

b) It forwards SIP messages from the network to a mobile

c) It compresses and decompresses SIP messages

d) It maintains a security association with the user

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Q. 57 , What is the responsibility of MGCF and IM-MGW?

a) MGCF is responsible for media inter-working and IM-MGW for signaling inter-working

b) MGCF and IM-MGW are both responsible for signaling inter-working

c) MGCF is responsible for signaling inter-working and IM-MGW for media inter-working

d) MGCF and IM-MGW are both responsible for media inter-working

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Q. 58 , What is the responsibility of BGCF?

a) BGCF selects to which PSTN network a session should be forwarded

b) BGCF is responsible for media inter-working

c) BGCF is responsible for signaling inter-working

d) BGCF is responsible for selecting the appropriate IM-MGW

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Q. 59 , Which two IMS services are deployed in BSNL?

a) VoLTE and VoWiFi

b) Convergent Conference Solution and Convergent Centrex Solution

c) Session Border Controller and Media Gateway

d) HSS and SLF

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Q. 60 , What type of terminals are the new communication paradigm based on?

a) Circuit-switched mobile devices

b) IP-based mobile devices

c) PSTN-based mobile devices

d) Soft clients

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Q. 61 , What type of applications are peer-to-peer entities?

a) Applications that exchange information only with the user interface

b) Applications that facilitate sharing

c) Applications that require the telephone network to establish a connection

d) Applications that are isolated entities

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Q. 62 , What does IMS stand for?

a) Internet Mobile System

b) Integrated Mobile System

c) IP Multimedia Subsystem

d) Integrated Multimedia System

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Q. 63 , What is the key ingredient required for IP-based applications to communicate?

a) A mechanism to reach the correspondent

b) A large, high-precision display

c) A built-in camera

d) A lot of resources for applications

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Q. 64 , Which network currently provides the critical task of establishing a connection?

a) The PSTN

b) The IMS

c) The Internet

d) The BSNL network

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Q. 65 , What does the Convergent Conference Solution in BSNL support?

a) Only video conference

b) Only instant messaging

c) Video conference, instant messaging, application share, electronic whiteboard, and automated dial-out conference

d) Only electronic whiteboard

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Q. 66 , What does the Convergent Centrex Solution in BSNL facilitate?

a) Fixed to mobile convergence

b) Multiple PBX modes

c) Wide variety of terminals and access modes

d) All of the above

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Q. 67 , Which AS is required for the Convergent Centrex Solution in BSNL?

a) HSS

b) SLF

c) IM-MGW

d) None of the above

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