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COMPUTER NETWORKS AND SECURITY(18CS52)


COMPUTER NETWORKS AND SECURITY

Course Code:18CS52 
CIE Marks:40
SEE Marks:60
Number of Contact Hours/Week 3:2:0 
Total Number of Contact Hours:50 
Exam Hours:03
CREDITS:4

Course Learning Objectives: This course (18CS52) will enable students to:

• Demonstration of application layer protocols
• Discuss transport layer services and understand UDP and TCP protocols
• Explain routers, IP and Routing Algorithms in network layer
• Disseminate the Wireless and Mobile Networks covering IEEE 802.11 Standard
• Illustrate concepts of Multimedia Networking, Security and Network Management

Module 1

Application Layer: Principles of Network Applications: Network Application Architectures,
Processes Communicating, Transport Services Available to Applications, Transport Services
Provided by the Internet, Application-Layer Protocols. The Web and HTTP: Overview of
HTTP, Non-persistent and Persistent Connections, HTTP Message Format, User-Server
Interaction: Cookies, Web Caching, The Conditional GET, File Transfer: FTP Commands &
Replies, Electronic Mail in the Internet: SMTP, Comparison with HTTP, Mail Message
Format, Mail Access Protocols, DNS; The Internet's Directory Service: Services Provided by
DNS, Overview of How DNS Works, DNS Records and Messages, Peer-to-Peer
Applications: P2P File Distribution, Distributed Hash Tables, Socket Programming: creating
Network Applications: Socket Programming with UDP, Socket Programming with TCP.
T1: Chap 2

Module 2

Transport Layer : Introduction and Transport-Layer Services: Relationship Between
Transport and Network Layers, Overview of the Transport Layer in the Internet,
Multiplexing and Demultiplexing: Connectionless Transport: UDP,UDP Segment Structure,
UDP Checksum, Principles of Reliable Data Transfer: Building a Reliable Data Transfer
Protocol, Pipelined Reliable Data Transfer Protocols, Go-Back-N, Selective repeat,
Connection-Oriented Transport TCP: The TCP Connection, TCP Segment Structure, Round-
Trip Time Estimation and Timeout, Reliable Data Transfer, Flow Control, TCP Connection
Management, Principles of Congestion Control: The Causes and the Costs of Congestion,
Approaches to Congestion Control, Network-assisted congestion-control example, ATM
ABR Congestion control, TCP Congestion Control: Fairness.
T1: Chap 3


Click here to download Module-2


Module 3

The Network layer: What's Inside a Router?: Input Processing, Switching, Output
Processing, Where Does Queuing Occur? Routing control plane, IPv6,A Brief foray into IP
Security, Routing Algorithms: The Link-State (LS) Routing Algorithm, The Distance-Vector
(DV) Routing Algorithm, Hierarchical Routing, Routing in the Internet, Intra-AS Routing in
the Internet: RIP, Intra-AS Routing in the Internet: OSPF, Inter/AS Routing: BGP, Broadcast
Routing Algorithms and Multicast.
T1: Chap 4: 4.3-4.7
 



Module 4

Network Security:Overview of Network Security:Elements of Network Security ,
Classification of Network Attacks ,Security Methods , Symmetric-Key Cryptography :Data
Encryption Standard (DES),Advanced Encryption Standard (AES) , Public-Key
Cryptography :RSA Algorithm ,Diffie-Hellman Key-Exchange Protocol , Authentication
:Hash Function , Secure Hash Algorithm (SHA) , Digital Signatures , Firewalls and Packet
Filtering ,Packet Filtering , Proxy Server .
Textbook2: Chapter 10

scroll down to get full notes

Module 5

Multimedia Networking: Properties of video, properties of Audio, Types of multimedia
Network Applications, Streaming stored video: UDP Streaming, HTTP Streaming, Adaptive
streaming and DASH, content distribution Networks
Voice-over-IP :Limitations of the Best-Effort IP Service ,Removing Jitter at the Receiver for
Audio ,Recovering from Packet Loss Protocols for Real-Time Conversational Applications ,
RTP , SIP
Textbook11: Chap 7

1-5 module notes




Course Outcomes: The student will be able to :

• Explain principles of application layer protocols
• Recognize transport layer services and infer UDP and TCP protocols
• Classify routers, IP and Routing Algorithms in network layer
• Understand the Wireless and Mobile Networks covering IEEE 802.11 Standard
• Describe Multimedia Networking and Network Management

Question Paper Pattern:

• The question paper will have ten questions.
• Each full Question consisting of 20 marks
• There will be 2 full questions (with a maximum of four sub questions) from each module.
• Each full question will have sub questions covering all the topics under a module.
• The students will have to answer 5 full questions, selecting one full question from each module.

Textbooks:

1. James F Kurose and Keith W Ross, Computer Networking, A Top-Down Approach, Sixth edition,
Pearson,2017 .
2. Nader F Mir, Computer and Communication Networks, 2nd Edition, Pearson, 2014.

Reference Books:

1. Behrouz A Forouzan, Data and Communications and Networking, Fifth Edition, McGraw Hill, Indian Edition
2. Larry L Peterson and Brusce S Davie, Computer Networks, fifth edition, ELSEVIER
3. Andrew S Tanenbaum, Computer Networks, fifth edition, Pearson
4. Mayank Dave, Computer Networks, Second edition, Cengage Learning
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