BIT 351                                            WITH EFFECTFROM THE ACADEMIC YEAR 2012-2013

COMPUTER NETWORKS

Instruction                                                                                                           4 Periods per week
Duration of University Examination                                                                   3Hours
University Examination                                                                                     75Marks
Sessional                                                                                                            25 Marks

UNIT-I
Introduction :Uses of Computer Networks, Network Hardware,
Network Software :Reference Models (ISO-OS!, TCP/IP).
NetworkLayer :Network Layer Design Issues, RoutingAlogrithms, Congestion Control Algorithms, Quality of Service.

UNIT-II
Internetworking :Concatenated virtual circuits, connectionless internetworking, tunneling, internet work routing, and fragmentation.

Network layer in the Internet: IP protocol, IP addresses Internet control protocols, OSPF, BGP, internet multicasting, mobile 1P IPv6.

Transport Layer:The transport Service, Element of Transport Protocols, The Internet Transport Protocols: UDP, Internet TransportProtocols :TCP.

UNIT-III
Network Programming
Socket Interface :Sockets, Socket Address, Elementary Sockets, Advanced Sockets, Socket Options, Non Blocking110,Out of Band Data, Daemon Process and Internet Super Server, IPv4 and IPv6.
Interoperability
Application Layer:
Domain NameSystem :DNS Name Space, Resource Records, Name Servers.

UNIT-IV
ElectronicMail :Architecture and Services, User Agent, Message Formats, Message transfer and Final Delivery.
 World WideWeb:Architectural Overview, Static Web Documents, Dynamic Web Documents,HTTP, Wireless Web.
Multimedia:Digital Audio, Streaming Audio, Voice over IP, Video on Demand.

UNIT-V
NetworkSecurity :Cryptography, symmetric key algorithms, Publics key Algorithms, Digital Signatures, Management of Public Keys, Communication Security,Authentication protocols, E-mail security, web security.

Suggested Reading:
A.Andrew S.Tanenbaum,“ComputerNetworks“,4th edition,Pearson Education, 2004.
2. W. RichardStevens,“UnixNetwork Programming“,PearsonEducation, 2008.

References :
1.BehrouzAForouzan“Data Communications andNetworking”,4thedition,TataMcGrawHill,2007.
2.NataliaOlifer, VictorOlifer,“Computer Networks. Principles,Technologies and Protocols for Network Design“,Wiley India, 2006.
3. Larry L. Peterson & Bruce S. Davie:“ComputerNetworks”4thedition,Elsevier, MorganKaunannPublishers, 2007.