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LDCE Wireline > NGN Architecture & protocols > Flashcards

NGN Architecture & protocols Flashcards

1
Q

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

A

1 and 2
but packet-based network

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2
Q

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

A

packet-based network

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3
Q

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

A

independent

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4
Q

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

A

NGN

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5
Q

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

A

more than one

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6
Q

NGN access layer consists of
1) Routers
2) Gateways

A

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

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7
Q

Entity nearer to subscriber
1) Router
2) Access gateway

A

Access gateway

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8
Q

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

A

both

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9
Q

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

A

transport layer

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10
Q

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

A

transport layer

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11
Q

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

A

transport layer

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12
Q

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

A

transport layer

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13
Q

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

A

control layer

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14
Q

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

A

control layer

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15
Q

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

A

control layer

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16
Q

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

A

MGC (Media Gateway Controller)

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17
Q

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

A

MG (Media Gateway)

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18
Q

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

A

application layer

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19
Q

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

A

access layer

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20
Q

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

A

access layer

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21
Q

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

A

control layer

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22
Q

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

A

control layer

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23
Q

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

A

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

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24
Q

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

A

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

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25
Q

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

A

Media gateway

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26
Q

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

A

MGC (Media Gateway Controller)

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27
Q

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

A

MGC (Media Gateway Controller)

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28
Q

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

A

MGC (Media Gateway Controller)

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29
Q

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

A

SG (Signalling gateway)

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30
Q

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

A

All

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31
Q

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

A

within

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32
Q

In exchanges, BHCA stands for

A

Busy-hour call attempts

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33
Q

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

A

64kbit/s

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34
Q

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

A

3 levels

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35
Q

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

A

200,000 DS0/shelf

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36
Q

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

A

2M BHCA/shelf

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37
Q

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

A

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

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38
Q

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

A

8 shelf

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39
Q

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

A

All

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40
Q

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

A

5,600

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41
Q

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

A

T

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42
Q

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

A

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

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43
Q

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

A

Chennai

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44
Q

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

A

Delhi

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45
Q

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

A

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

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46
Q

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

A

Soft Switch based
tender to M/s CDOT

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47
Q

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

A

M/s CDOT

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48
Q

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

A

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

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49
Q

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

A

Gurgaon, Chandigarh (DR)

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50
Q

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

A

Kolkata, Cuttack (DR)

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51
Q

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

A

Bangalore, Hyderabad (DR)

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52
Q

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

A

Pune, Bhopal (DR)

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53
Q

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

A

SBC: Session Border Controller

54
Q

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

A

SBC: Session Border Controller

55
Q

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

A

SBC: Session Border Controller

56
Q

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

A

C5 Soft switch

57
Q

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

A

C4 Soft switch

58
Q

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

A

C4 Soft switch

59
Q

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

A

RATER Engine

60
Q

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

61
Q

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

62
Q

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

63
Q

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

64
Q

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

A

LIS Server

65
Q

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

66
Q

LAGU stands for

A

Line access gateway unit

67
Q

CACU stands for

A

Central Access Control Unit

68
Q

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

69
Q

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

70
Q

________ 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

71
Q

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

72
Q

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

73
Q

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

74
Q

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

A

LAGU, CACU

75
Q

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

A

Chandigarh, Lucknow (DR)

76
Q

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

A

Bhubhaneshwar, Kolkata(DR)

77
Q

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

A

Hyderabad, Bangalore(DR)

78
Q

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

A

Ahmedabad, Pune(DR)

79
Q

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

A

Chandigarh, Hyderabad(DR)

80
Q

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

81
Q

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

A

LMG : Line Media Gateway

82
Q

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

83
Q

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

84
Q

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

85
Q

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

A

H.248 is a Media Gateway Control Protocol

86
Q

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

A

RTP is a Media Transport Protocol

87
Q

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

A

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

88
Q

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

A

RTP/RTCP(IETF) over UDP(IETF)

89
Q

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

90
Q

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

A

Termination and Context

91
Q

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

92
Q

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

A

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

93
Q

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

A

null Context

94
Q

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

A

null Context

95
Q

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

A

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

96
Q

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

A

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

97
Q

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

98
Q

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

99
Q

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

100
Q

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

A

transactions

101
Q

________ are executed in order
1) commands
2) transactions

A

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

102
Q

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

A

transactions

103
Q

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

104
Q

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

A

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

105
Q

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

A

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

106
Q

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

A

Reply
- Receipt of Pending should restart the timer.

107
Q

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

A

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

108
Q

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

A

Signalling transport

109
Q

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

A

Stream Control Transmission Protocol (SCTP)

110
Q

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

A

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

111
Q

Call control protocol SIP stands for

A

Session Initiation Protocol

112
Q

Call control protocol BICC stands for

A

Bearer Independent Call Control Protocol

113
Q

Media Transport Protocols: RTP/RTCP stands for

A

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

114
Q

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

A

4) users in SIP are identified by the URLs

115
Q

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

A

3) Location Server
4) web server

116
Q

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

A

1) initiate a call, answer a call

117
Q

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

A

3) either 1 or 2

118
Q

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

A

3) User agents

119
Q

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

A

1, 2 and 3

120
Q

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

A

Proxy Server

121
Q

_____ 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

A

Redirect Server

122
Q

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

123
Q

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

124
Q

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

125
Q

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

A

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.

126
Q

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

A

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

127
Q

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

A

Termination

128
Q

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

A

TransactionID

129
Q

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

A

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

130
Q

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

LDCE Wireline (5 decks)

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