Computer Networks [R15A0513] Lecture Notes

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COMPUTER NETWORKS
[R15A0513]
LECTURE NOTES


B.TECH III YEAR – II SEM (R15)
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(2019-20)
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DEPARTMENT OF
COMPUTER SCIENCE AND ENGINEERING

MALLA REDDY COLLEGE OF ENGINEERING &
TECHNOLOGY
(Autonomous Institution – UGC, Govt. of India)
Recognized under 2(f) and 12 (B) of UGC ACT 1956
(Affiliated to JNTUH, Hyderabad, Approved by AICTE - Accredited by NBA & NAAC – ‘A’ Grade - ISO 9001:2015 Certified)
Maisammaguda, Dhulapally (Post Via. Hakimpet), Secunderabad – 500100, Telangana State, India

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III Year B. Tech. CSE –II Sem L T/P/D C
4 1/- / - 3
(R15A0513) Computer Networks
Objectives:
 To introduce the fundamental types of computer networks.
 To demonstrate the TCP/IP & OSI model merits & demerits.
 To know the role of various protocols in Networking

UNIT - I:
Introduction: Network, Uses of Networks, Types of Networks, Reference Models: TCP/IP
Model, The OSI Model, Comparison of the OSI and TCP/IP reference model. Architecture of
Internet.
Physical Layer: Guided transmission media, Wireless transmission media, Switching
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UNIT - II:
Data Link Layer - Design issues, Error Detection & Correction, Elementary Data Link Layer
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Protocols, Sliding window protocols
Multiple Access Protocols - ALOHA, CSMA,CSMA/CD, CSMA/CA, Collision free protocols,
Ethernet- Physical Layer, Ethernet Mac Sub layer, Data link layer switching: Use of bridges,
learning bridges, spanning tree bridges, repeaters, hubs, bridges, switches, routers and
gateways.
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UNIT - III:
Network Layer: Network Layer Design issues, store and forward packet switching connection
less and connection oriented networks-routing algorithms-optimality principle, shortest path,
flooding, Distance Vector Routing, Count to Infinity Problem, Link State Routing, Path Vector
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Routing, Hierarchical Routing; Congestion control algorithms, IP addresses, CIDR, Subnetting,
SuperNetting, IPv4, Packet Fragmentation, IPv6 Protocol, Transition from IPv4 to IPv6, ARP,
RARP.
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UNIT - IV:
Transport Layer: Services provided to the upper layers elements of transport protocol
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addressing connection establishment, Connection release, Error Control & Flow Control, Crash
Recovery.
The Internet Transport Protocols: UDP, Introduction to TCP, The TCP Service Model, The TCP
Segment Header, The Connection Establishment, The TCP Connection Release, The TCP Sliding
Window, The TCP Congestion Control Algorithm.

UNIT - V: Application Layer- Introduction, providing services, Applications layer paradigms:
Client server model, HTTP, E-mail, WWW, TELNET, DNS; RSA algorithm,

TEXT BOOKS:

1. Computer Networks - Andrew S Tanenbaum, 4th Edition, Pearson Education.
2. Data Communications and Networking - Behrouz A. Forouzan, Fifth Edition TMH, 2013.

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REFERENCES BOOKS:
1. An Engineering Approach to Computer Networks - S. Keshav, 2nd Edition, Pearson Education.
2. Understanding communications and Networks, 3rd Edition, W. A. Shay, Cengage Learning.
3. Computer Networking: A Top-Down Approach Featuring the Internet, James F. Kurose, K. W.
Ross, 3rd Edition, Pearson Education.

Outcomes:
 Students should be understand and explore the basics of Computer Networks and
Various Protocols.
 Student will be in a position to understand the World Wide Web concepts.
 Students will be in a position to administrate a network and flow of information further
 Student can understand easily the concepts of network security, Mobile
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INDEX
TOPIC PAGE NO
UNIT NO
INTRODUCTION TO NETOWRKS 1

TYPES OF NETWORKS, 4
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INTRODUCTION TO PYSICAL LAYER 18

COMPARISON OF OSI AND TCP/IP 25
PROTOCOLS
DATA LINK LAYER DESIGN ISSUES 35

II SLIDI NG WINDOW PROTOCOLS 41
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MULTIPLE ACCESS PROTOCOLS 49
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NETWORK LAYER DESIGN ISSUES 78

III CONNECTION LESS AND CONNECTION 80
ORIENTED PROTOCOLS
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ROUTING PROTOCOLS,IP ADDRESS
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TRANSPORT LAYER SERVICES 101
IV PROVIDED
THE INTERNET TRANSPORT 130
PROTOCOLS
APPLICATION LAYER SERVICES 249
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APPLICATIONS LAYER PARADISMS 256
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