NGN Architecture & protocols Flashcards by Prabhash K P

NGN feature(s)
1) common transport network
2) Vendor independence
3) circuit-based network

1 and 2
but packet-based network

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NGN is
1) packet-based network
2) circuit-based network
3) both

packet-based network

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In NGN service-related functions are ________ of the underlying transport-related technologies
1) dependent
2) independent

independent

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______ supports generalized mobility without SIM
1) UMTS
2) NGN

NGN

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Usr can register _____ device(s) at a time in NGN registrar servers
1) one
2) more than one

more than one

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NGN access layer consists of
1) Routers
2) Gateways

Gateways.
Example of getaways are media Gateway, Access gateway. Signalling gateway

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Entity nearer to subscriber
1) Router
2) Access gateway

Access gateway

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Transport Layer of NGN
1) based on IP
2) can utilize the advantage of MPLS
3) both

both

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________ is responsible for carrying traffic originated by access layer
1) access layer
2) transport layer
3) control layer
4) application layer

transport layer

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____ can utilize the advantage of MPLS
1) access layer
2) transport layer
3) control layer
4) application layer

transport layer

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It is basically an assembly
of routers connected with optical network.
1) access layer
2) transport layer
3) control layer
4) application layer

transport layer

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It makes use of band width policies and Qos policies
1) access layer
2) transport layer
3) control layer
4) application layer

transport layer

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It is responsible of call setup, routing and charging policies
1) access layer
2) transport layer
3) control layer
4) application layer

control layer

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It consists of call servers where all information of the network
resides
1) access layer
2) transport layer
3) control layer
4) application layer

control layer

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responsible for setting up, modifying, charging and tear down of the calls
1) access layer
2) transport layer
3) control layer
4) application layer

control layer

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NGN may work on soft switch principle. It uses _______ as an overall controller
1) MG
2) MGC

MGC (Media Gateway Controller)

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NGN may work on soft switch principle. It uses _______ for termination of traffic
1) MG
2) MGC

MG (Media Gateway)

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It is responsible for OSS/BSS
1) access layer
2) transport layer
3) control layer
4) application layer

application layer

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___ is responsible for direct subscriber attachment function
1) access layer
2) transport layer
3) control layer
4) application layer

access layer

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_________ is responsible for packetisation of media under the instruction of control layer
1) access layer
2) transport layer
3) control layer
4) application layer

access layer

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access layer is responsible for packetisation of media under the instruction of ________
1) access layer
2) transport layer
3) control layer
4) application layer

control layer

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All the required configuration of subscribers should be done at ____
1) access layer
2) transport layer
3) control layer
4) application layer

control layer

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Choose correct item(s) for NGN
1) centralised call control
2) dedicated network for providing voice services
3) working on packet switching
4) excellent quality of voice as compared to PSTN

1 and 3
PSTN call quality is better as compared to NGN

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________ is the 1st step towards NGN
1) IMS project
2) IP Tax Project

IP Tax Project
- is a class4 NGN implementation.
- equipment by M/s ZTE.

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conference call is supported by _________ in IPTAX 1) Media gateway 2) Soft switch 3) signaling gateways

Media gateway

_______ holds the ultimate responsibility of defining what resources are to be allocated for a particular call 1) MGC 2) MGW 3) MGE

MGC (Media Gateway Controller)

____ maintains a state table for all resources within the MGs in its zone 1) MGC 2) MGW 3) MGE

MGC (Media Gateway Controller)

the call handling is performed at 1) MG 2) MGC

MGC (Media Gateway Controller)

_____ should be capable of providing conversions between SS7 addresses (point codes) and IP addresses 1) MG 2) AG 3) SG

SG (Signalling gateway)

IP-TAX components 1) Media Gateway 2) Softswitch (Media gateway controller) 3) Signaling gateway 4) Announcement server 5) All

All

Announcement server is ________ the IP domain 1) within 2) outside

within

In exchanges, BHCA stands for

Busy-hour call attempts

Digital Signal 0 (DS0) is a basic digital signaling rate of _____ 1) 16kbit/s 1) 32kbit/s 1) 64kbit/s 1) 1024kbit/s

64kbit/s

Soft switch Control: ZXSS10 SS1b Billing records are stored at _____ levels 1) 1 2) 2 3) 3 4) 4

3 levels

Soft switch Control: ZXSS10 SS1b Maximum capacity of trunk is 1) 100,000 DS0/shelf 2) 200,000 DS0/shelf 3) 400,000 DS0/shelf 4) 800,000 DS0/shelf

200,000 DS0/shelf

ZTE Soft switch can support maximum load of traffic ______ without extension 1) 1M BHCA/shelf 2) 2M BHCA/shelf 3) 3M BHCA/shelf 4) 4M BHCA/shelf

2M BHCA/shelf

ZTE Soft switch can support maximum load of traffic ______ with extension 1) 4M BHCA/shelf 2) 8M BHCA/shelf 3) 16M BHCA/shelf 4) 32M BHCA/shelf

16M BHCA/shelf (max shelf is 8 and 2M BHCA/shelf)

ZTE Soft switch can support maximum shelf 1) 2 shelf 2) 4 shelf 3) 8 shelf 4) 16 shelf

8 shelf

ZTE ZXMSG 9000 can provide the functions of _____ through different board and software configurations 1) TG 2) SG 3) AG 4) All

All

Trunk Media Gateway: ZXMSG 9000 supports ________ E1 as Trunk Gateway 1) 3200 2) 4800 3) 5600 4) 6400

5,600

Trunk Media Gateway: ZXMSG 9000 can be configured as announcement server T/F

The architecture of network management system is divided into typical 3 layers. write expansions 1) NEL 2) EML 3) NML

Network Element Layer (NEL), Element Management Layer (EML) Network Management Layer (NML)

NGN NOC location 1) Chennai 2) Hyderabad 3) Delhi 4) bangalore

Chennai

NGN NOC DR (Disaster Recovery) location 1) Chennai 2) Hyderabad 3) Delhi 4) bangalore

Delhi

Class 5 implementation of Access equipment BSNL has adopted two different approaches 1) Soft Switch based 2) _________

IMS based M/s Huawei with additional capacity tender given to M/s UTSTARCOM

Class 5 implementation of Access equipment BSNL has adopted two different approaches 1) ____________ 2) IMS based

Soft Switch based tender to M/s CDOT

Class 5 implementation of Access equipment 'Soft Switch based' system tender given to 1) M/s CDOT 2) M/s Huawei 3) M/s UTSTARCOM

M/s CDOT

Class 5 implementation of Access equipment 'IMS based' system tender given to 1) M/s CDOT 2) M/s Huawei 3) M/s UTSTARCOM

M/s Huawei with additional capacity tender given to M/s UTSTARCOM

CDOT MAX NG Core Locations for north zone 1) Gurgaon, Chandigarh (DR) 2) Gurgaon, Delhi (DR) 3) Chandigarh, Delhi (DR) 4) Lucknow , Delhi (DR)

Gurgaon, Chandigarh (DR)

CDOT MAX NG Core Locations for east zone 1) Kolkata, Bhubhaneshwar(DR) 2) Kolkata, Cuttack (DR) 3) Bhubhaneshwar, Cuttack (DR) 4) Cuttack, Bhopal (DR)

Kolkata, Cuttack (DR)

CDOT MAX NG Core Locations for south zone 1) Chennai, Hyderabad (DR) 2) Bangalore, Chennai(DR) 3) Bangalore, Hyderabad (DR) 4) Pune, Hyderabad (DR)

Bangalore, Hyderabad (DR)

CDOT MAX NG Core Locations for west zone 1) Ahmedabad, Bhopal (DR) 2) Ahmedabad, Pune(DR) 3) Pune, Ahmedabad(DR) 4) Pune, Bhopal (DR)

Pune, Bhopal (DR)

CDOT NGN the entry point for the core 1) C4 Soft switch 2) C5 Soft switch 3) SBC 4) RATER Engine

SBC: Session Border Controller

All the access equipments will be aggregated and connected to 1) C4 Soft switch 2) C5 Soft switch 3) SBC 4) RATER Engine

SBC: Session Border Controller

____acts as a firewall for the CDOT 1) C4 Soft switch 2) C5 Soft switch 3) SBC 4) RATER Engine

SBC: Session Border Controller

It is having different elements inside it namely Database server, Feature server, Media server, billing server and call processing engine 1) C4 Soft switch 2) C5 Soft switch 3) SBC 4) RATER Engine

C5 Soft switch

It is responsible for routing calls from/to CDOT NGN to PLMN/PSTN. 1) C4 Soft switch 2) C5 Soft switch 3) SBC 4) RATER Engine

C4 Soft switch

It supports MEGACO,SIP protocols for routing signalling messages 1) C4 Soft switch 2) C5 Soft switch 3) SBC 4) RATER Engine

C4 Soft switch

For processing of the CDR received from C5 and to push it towards billing server 1) C4 Soft switch 2) C5 Soft switch 3) SBC 4) RATER Engine

RATER Engine

SG Server helps in converting ____ to SIGTRAN and vice versa. 1) SS7 2) X.25 3) V5.1

SS7

SG Server helps in converting SS7 to _________ and vice versa. 1) SIGTRAN 2) X.25 3) V5.1

SIGTRAN

Backup and restoration of LAGU can be done through 1) NGEMS 2) LAGEMS 3) LIS Server 4) INSSP

LAGEMS

For NMS functionality to support O&M of core elements 1) NGEMS 2) LAGEMS 3) LIS Server 4) INSSP

NGEMS

For monitoring of calls 1) NGEMS 2) LAGEMS 3) LIS Server 4) INSSP

LIS Server

For routing calls which requires trigger towards SCP database 1) NGEMS 2) LAGEMS 3) LIS Server 4) INSSP

INSSP

LAGU stands for

Line access gateway unit

CACU stands for

Central Access Control Unit

choose item(s) LAGU unit is connected to CACU via 1) E1’s 2) STM-1 3) Ethernet

1 and 3

A single _______unit can replace a BM along with two LM working in concentration mode 1) LAGU 2) CACU

LAGU

________ card is responsible for processing and converting analogue voice traffic from ATU’s of BM to RTP packets 1) EBM 2) NGTK 3) MLS 4) SLM

NGTK

For converting E1 traffic to Ethernet and vice versa 1) EBM 2) NGTK 3) MLS 4) SLM

EBM

It acts as a L3 switch and is used for aggregating all the LAGU to CACU 1) EBM 2) NGTK 3) MLS 4) SLM

MLS

It is a shelf monitoring card for the CACU unit 1) EBM 2) NGTK 3) MLS 4) SLM

SLM

For every Co-located Line BM and Remote BM there is requirement of ____system. For every MBM system there is requirement of one _______ system 1) LAGU, CACU 2) CACU, LAGU

LAGU, CACU

IMS based Core Locations for north zone 1) Gurgaon, Chandigarh (DR) 2) Gurgaon, Delhi (DR) 3) Chandigarh, Lucknow (DR) 4) Lucknow, Delhi (DR)

Chandigarh, Lucknow (DR)

IMS based Core Locations for east zone 1) Kolkata, Bhubhaneshwar(DR) 2) Kolkata, Cuttack(DR) 3) Bhubhaneshwar, Kolkata(DR) 4) Cuttack, Bhopal(DR)

Bhubhaneshwar, Kolkata(DR)

IMS based Core Locations for south zone 1) Chennai, Hyderabad(DR) 2) Bangalore, Chennai(DR) 3) Bangalore, Hyderabad(DR) 4) Hyderabad , Bangalore(DR)

Hyderabad, Bangalore(DR)

IMS based Core Locations for west zone 1) Bombay, Ahmedabad(DR) 2) Bombay, Pune(DR) 3) Pune, Bombay(DR) 4) Ahmedabad, Pune(DR)

Ahmedabad, Pune(DR)

UTstarcom IMS based Core Locations 1) Chandigarh, Hyderabad(DR) 2) Chandigarh, Bangalore(DR) 3) Bangalore, Hyderabad(DR) 4) , Hyderabad, Bangalore(DR)

Chandigarh, Hyderabad(DR)

choose correct item(s) IMS based package 2 Access Equipments are supplied 1) M/s Huawei 2) M/s ZTE 3) M/s UTStarcom 4) all

all

In IMS based NGN, the Access equipment called as ____ is a replacement to all the TDM based local exchanges 1) UA5000 2) LMG 3) IAG

LMG : Line Media Gateway

In IMS based NGN, ______ is equipped with both voice and ADSL functionality thus eliminating the use of DSLAM 1) UA5000 2) LMG 3) IAG

LMG

In IMS based NGN, for providing PRI/BRI facility separate _____ equipment is being provided 1) UA5000 2) LMG 3) IAG

IAG

LMG’s _____ (can/cannot) be cascaded to increase the capacity

can be

Choose which is not a call control protocol 1) SIP 2) H.248 3) H.323 4) BICC

H.248 is a Media Gateway Control Protocol

Choose which is not a Signalling transport protocol 1) UDP 2) TCP 3) RTP 4) SCTP

RTP is a Media Transport Protocol

Media Gateway Control Protocol 1) SIP 2) H.248 3) H.323 4) BICC

H.248(ITU-T) /Megaco (IETF)

Media Transport Protocol 1) UDP 2) TCP 3) RTP 4) SCTP

RTP/RTCP(IETF) over UDP(IETF)

Megaco protocol is 1) H.284 2) H.248 3) H.323 4) H.348

H.248

Two abstractions in H.248/Megaco protocol are (select 2) 1) Termination 2) Source 3) Context 4) Control

Termination and Context

A ________is an association between a collection of Terminations 1) Transaction 2) Source 3) Context 4) Control

Context

A __________ sources and/or sinks one or more streams. 1) Termination 2) gateway 3) Context 4) Control

Termination The media stream parameters, as well as modem, and bearer parameters are encapsulated within the Termination

_______ contains all Terminations that are not associated to any other Termination 1) empty context 2) null Context 3) void Context 4) null termination

null Context

In a decomposed access gateway, all idle lines are represented by Terminations in the _______ 1) empty context 2) null Context 3) void Context 4) null termination

null Context

____ commands defined in H.248 1) four 2) eight 3) sixteen

eight They are Add, Modify, Subtract, Move, Audit Value, Audit Capability, Notify and Service Change

____ command is not defined in H.248 1) add 2) subtract 3) move 4) divide

divide Commands are Add, Modify, Subtract, Move, Audit Value, Audit Capability, Notify and Service Change

a/an _______consists of a series of Commands that are limited to operating within a single Context 1) transaction 2) action

action

Transactions consist of one or more ______ 1) commands 2) actions 3) interactions

actions

each action typically must specify a _______ 1) ContextID 2) TransactionID

ContextID

________ may be executed in any order, or simultaneously 1) commands 2) transactions

transactions

________ are executed in order 1) commands 2) transactions

commands -Transactions guarantee ordered Command processing -the commands in an event interworking are executed in order

_______ guarantee ordered Command processing 1) transactions 2) actions 3) interactions

transactions

At the first failure of a Command in a Transaction, the processing of the remaining Commands in that Transaction will ____. 1) stop 2) continue skipping failed command

stop

There _________ an application level timer per transaction 1) may be 2) should be 3) need not be

should be Expiration of the timer should cause a retransmission of the request.

Expiration of the application level timer per transaction should cause a _________ of the request. 1) dropping 2) retransmission

retransmission - Receipt of a Reply should cancel the timer. - Receipt of Pending should restart the timer.

Receipt of ________ should cancel the application level timer 1) Reply 2) Pending

Reply - Receipt of Pending should restart the timer.

The ___ is a data communications network for transport of control plane signaling 1) STN 2) SCN

SCN: Signaling Communication Network - The SCN is an IP-based network

SIGTRAN is derived from 1) Signalling transport 2) Signalling transmission 3) Signalling transaction

Signalling transport

SIGTRAN protocols use an Internet Protocol (IP) transport called ______ instead of TCP or UDP. 1) RTCP 2) SCTP

Stream Control Transmission Protocol (SCTP)

SIGTRAN protocol is composed of three parts: 1) Signaling application layer 2) Signaling adaptation layer 3) Signaling transmission layer 4) IP transmission layer

2) Signaling adaptation layer 3) Signaling transmission layer 4) IP transmission layer

Call control protocol SIP stands for

Session Initiation Protocol

Call control protocol BICC stands for

Bearer Independent Call Control Protocol

Media Transport Protocols: RTP/RTCP stands for

RTP: Real Time Transport Protocol RTCP: Real Time Control Protocol

Choose not true about SIP 1) to establish and manage multimedia sessions over IP networks 2) complete end to end signaling protocol 3) text based protocol 4) users in SIP are identified by the signalling IDs 5) none

4) users in SIP are identified by the URLs

entity not defined in SIP 1) user agents 2) Network Servers 3) Location Server 4) web server

3) Location Server 4) web server

SIP user agent client UAC is used to ________ call and user agent server UAS is used to _______ 1) initiate a call, answer a call 2) answer a call, initiate a call

1) initiate a call, answer a call

SIP can be implemented in 1) computer as one among many applications 2) dedicated device, such as SIP phone 3) either 1 or 2

3) either 1 or 2

All interaction between users and SIP protocol are mediated by ______ 1) Location servers 2) Network servers 3) User agents

3) User agents

SIP, three types of network servers 1) Redirect Server 2) Registrar Server 3) Proxy Server 4) location server

1, 2 and 3

______ is the first point of contact in the network. 1) Redirect Server 2) Registrar Server 3) Proxy Server 4) location server

Proxy Server

_____ help locate SIP UAs by providing alternative locations where the user can be reachable. 1) Redirect Server 2) Registrar Server 3) Proxy Server 4) location server

Redirect Server

transport protocol for voice and video on the Internet. 1) RTP 2) RTCP 3) SIP

RTP

______is used for loose session control, QoS reporting, and media synchronization, among other functions 1) RTP 2) RTCP 3) SIP

RTCP

Applications typically run RTP on top of _____ 1) TCP 2) UDP

UDP

RTP 1) guarantee delivery 2) prevent out-of-order delivery 3) guarantee QoS 4) all 5) none

none RTP itself does not provide any mechanism to ensure timely delivery or provide other quality-of-service guarantees, but relies on lower-layer services to do so. It does not guarantee delivery or prevent out-of-order delivery.

The sequence numbers in RTP 1) may indicate sender's packet sequence 2) may indicate proper location of a packet 3) either 1 or 2 4) both

3) either 1 or 2 The sequence numbers included in RTP allow the receiver to reconstruct the sender's packet sequence, but sequence numbers might also be used to determine the proper location of a packet, for example in video decoding, without necessarily decoding packets in sequence

The media stream parameters, as well as modem, and bearer parameters are encapsulated within the ____ 1) Termination 2) Source 3) Context 4) Control

Termination

One event interworking can be identified by a 1) ContextID 2) TransactionID

TransactionID

_____ guarantee that the existent SCN Signaling application can be put into use without modification 1) MEGACO 2) SIGTRAN 3) SIP

SIGTRAN supports the interface with the standard primary language of the SCN Signaling application without any modification

The _____ protocol stack transmits the SCN Signaling in the IP network 1) MEGACO 2) SIGTRAN 3) SIP

SIGTRAN

NGN Architecture & protocols Flashcards

(130 cards)