DC1621 High Speed Network Architecture M.E Question Bank : niceindia.com
Name of the College : Noorul Islam College of Engineering
University : Anna University
Degree : M.E Communication Systems
Department : Electronics and Communication Engineering
Subject Code/Name : DC 1621 – High Speed Network Architecture
Document Type : Question Bank
Website : niceindia.com
Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/niceindia.com/3111-DC1621_HIGH_SPEED_SWITCHING_ARCHITECTURE.pdf
High Speed Network Architecture Sample Question Paper
Unit 1 :
1.DefineISDN? :
The integrated services digital network is to provide a unique user network interface(UNI) for the support of the basic set of narrow band(NB) services that is voice and low speed data thus providing a narrowband integrated access.
Related : Noorul Islam College of Engineering XCS593 Networks Security M.Sc Question Bank : www.pdfquestion.in/3136.html
2.What are the features of an ISDN? :
1.Standard user network interface (UNI)
2.Integrated digital transport
3.Service integration
4.Intelligent network services
3.What is constant bit rate(CBR)? :
CBR is used to provide circuit emulation services . The corresponding bandwidth allocated on the peak of the traffic sources so that a virtually loss free communication service is obtained with prescribed targets of cell transfer delay(CTD) and cell delay variation(CDV)
4.What is available bit rate(ABR)? :
It is used to support data traffic sources. In this class a minimum bandwidth can be required by the source that is guaranteed by the network. The service is supported with the guarantee of CLR or CTD.
5.What is unspecified bit rate(UBR)? :
It is used to support data sources willing to use just the capacity left available by all the other with out any objective on CLR and CTD.
6. Define ATM adaptation layer(AAL)? :
A collection of standardized protocols that provide services to higher layers by adapting user traffic to a cell format.
7.Define AAL1(AAL type 1)? :
An AAL used for the transport of constant bit rate (CBR) traffic (ie. Audio and video ) and for emulating TDM based circuits.
8.Define AAL2(AAL type2)? :
An AAL used for supporting time dependent variable bit rate (VBR-RT) connection oriented traffic(ie.packetized video and audio).
9.What is AAL3/4(AAL type 3 and 4)? :
An AAL used for supporting both connectionless and connection oriented variable bit rate (VBR) traffic.It is also used to support SMDS.
10.What is AAL5(AAL type5)? :
The most common AAL type used for the transport of data packets.
11.Define ATM? :
A broadband switching and multiplexing, connection-oriented,high performance and cost effective integrated technology for supporting BISDN services.
12.What are the features of SDH? :
1.provision of single world wide transmission network
2. easy multiplexing and demultiplexing
3.flexibility in adapting internal signal structure
4.provision of operation and maintenance functions.
13. What are the layers present in SDH ? :
1.Circuit layer 2.path layer 3.transmission layer
14.Give the SDH multiplexing elements? :
Container, virtual container, tributrary unit, tributrary unit group , administrative unit, administrative unit group, synchronous transport module .
15. What is meant by floating mode of multiplexing? :
Pointer information allows a VC to float within it’s TU is called mode of multiplexing.
16.What are the elements present in VC? :
A VC consists of a Container and the path overhead processed in the SDH multiplexer.
17. What are the functions of a tributrary unit group? :
It performs the function of assembling together several TU’s with out further overhead.
18.What is path overhead? :
The header needed to perform the functions at the path layer is path overhead.
19. What is the need for plesiochronous digital hierarchy? :
The need is to develop a step-by-step hierarchical multiplexing in which higher level multiplexing are needed.
20. What is SS7? :
SS7 defines athe signaling network features and the protocol architecture of the common channel signaling used in ISDN.