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Here you can download the free Computer Networks Notes Pdf Material – CN Notes Pdf of Latest & old materials with multiple file links to download. Computer networks pdf notes starts with the topics covering Introduction to networks, internet, protocols & standards, the OSI model, layers in OSI model, TCP/IP suite, Addressing, Analog & digital signals, etc.

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Computer Networks Notes Pdf Free Download (CN Notes Pdf)

Latest Material 2 Links – Computer Networks Pdf Notes

Unit 1

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Unit 2

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Unit 3

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Unit 4

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Unit 5

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Link – Complete Notes (Temporarily this File is not available)

computer networks pdf notes


Latest Material 3 Links

Link – Complete Notes

Unit 1

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Unit 2

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Unit 3

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Unit 4

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Unit 5

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computer networks pdf notes

Latest Material 4 Links

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Unit 1

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Unit 2

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Unit 3

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Unit 4

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Unit 5

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computer networks pdf notes

Old Material Links

Computer networks notes – UNIT I

Introduction to networks, internet, protocols and standards, the OSI model, layers in OSI model, TCP/IP suite, Addressing, Analog and digital signals.


Download CN notes pdf unit – 1


Download C-N notes pdf unit

UNIT II – Computer Networks pdf notes

Physical Layer: digital transmission, multiplexing, transmission media. circuit switched networks. Datagram networks. virtual circuit networks, switch and Telephone network.


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UNIT III – Computer Networks pdf notes

Data link layer: Introduction, Block coding, cyclic codes, chccksum, framing, flow and error control, Noiseless channels, noisy channels, HDLC, point to point protocols


Download CN notes pdf unit – 3


Download C-N notes pdf unit – 3a

UNIT IV – Computer Networks pdf notes

Medium Access sub layer: Random access, controlled access, channelization. IEEE standards. Ethernet. Fast Ethernet, Giga-Bit Ethernet, wireless LANs.


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UNIT V – Computer Networks notes pdf

Connecting LANs, backbone networks and virtual LANs, Wireless WANs, SONET, frame relay and ATM.

Computer Networks Notes Pdf Material – CN Notes Pdf

Download CN notes pdf unit – 5


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UNIT VI – Computer Networks notes pdf

Network Layer: Logical addressing, internetworking, tunneling, address mapping, ICMP, IGMP, forwarding, uni-cast routing protocols, multicast routing protocols.


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UNIT VII – Computer Networks notes pdf

Transport Layer: Process to process delivery, UDP and TCP protocols, SCTP, data traffic, congestion, congestion control. QoS. integrated services, differentiated services. QoS in switched networks.


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UNIT VIII – Computer Networks notes pdf

Application Layer — Domain name space, DNS in intcrnet, electronic mail, FTP, WWW, HTTP, SNMP, multi-media, network security


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Download C-N notes pdf unit – 8


  1. Data Communications and Networking — Behrouz A. Forouzan. Fourth Edition TMH,2006.
  2. Computer Networks Andrew S Tanenbaum, 4th Edition, Pearson Education.


  1. An Engineering Approach to Computer Networks-S.Keshav,2nd Edition,Pears0n Education
  2. Understanding communications and Net’works,3rd Edition, W.A.Shay,Cengage Learning.
  3. Computer and Communication Networks ,Nader F. Mir, Pearson Education
  4. Computer Networking:A’l‘op-Down Approach Featuring the Internet. James F.Kurose,K.W.Ross,3“’ Edition,Pearson Education.
  5. Data and Computer C0mmunications,GtS.Hura and M.Singhal,CRC Press,Taylor and Francis Group.
  6. Data communications and computer Networks,P.C.Gupta,PHI.

Note :- These notes are according to the r09 Syllabus book ofJNTUH.In R13 ,8-units of R09 syllabus are combined into 5-units in r13 syllabus.Click here to check all the JNTU Syllabus books

Frequently Asked Questions

Q1: What is a computer network?

A1: A computer network is a group of computers linked to each other that enables the computer to communicate with another computer and share their resources, data, and applications.

Q2: What are the types of computer network?


  • LAN(Local Area Network)
  • PAN(Personal Area Network)
  • MAN(Metropolitan Area Network)
  • WAN(Wide Area Network)

Q3: What is a LAN?

A3: Full form of LAN is Local Area Network, LAN is a group of computers connected to each other in a small area such as office, building. It is used to connect two or more personal computers through a communication medium such as coaxial cable, twisted pair, etc. LAN is not very costly as it is built with inexpensive hardware such as network adapters, hubs and ethernet cables. The data in Local Area Network will be transferred at an extremely faster rate. LAN provides higher security.

Q4: What is PAN?

A4: Full form of PAN is Personal Area Network. It is a network arranged within a range of 10 meters, typically within an individual person. PAN is used for connecting the computer devices of personal use. Personal Area Network idea was bought by Thomas Zimmerman who was a research scientist. It covers an area of 30 feet. Personal computer devices that are used to develop the personal area network are the mobile phones, laptop, play stations and media players.

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