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Computer Networks Study Materials

Computer Networks study materials covering OSI and TCP/IP models, IP addressing, subnetting, routing protocols (RIP, OSPF), transport layer (TCP/UDP), application layer (HTTP, DNS, FTP), and network security.

B.TechBCAClass 12

Topic-wise Notes

OSI Model

Seven layers (Physical, Data Link, Network, Transport, Session, Presentation, Application) and their functions.

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TCP/IP Model

TCP/IP layers, comparison with OSI, IP protocol, and TCP vs UDP.

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IP Addressing & Subnetting

IPv4 addressing, classes, subnetting, CIDR, VLSM, and IPv6 basics.

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Routing & Routing Protocols

Static vs dynamic routing, RIP, OSPF, BGP, and routing algorithms (Dijkstra).

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Data Link Layer

Framing, error detection/correction, CRC, Hamming code, MAC addressing, and CSMA/CD.

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Transport Layer (TCP & UDP)

TCP connection establishment (3-way handshake), flow control, congestion control, and UDP.

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Application Layer Protocols

HTTP, HTTPS, DNS, FTP, SMTP, POP3, IMAP, DHCP, and SNMP.

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Wireless Networks & Wi-Fi

IEEE 802.11 standards, Wi-Fi security (WPA2, WPA3), Bluetooth, and cellular networks.

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Network Security

Firewalls, IDS/IPS, VPNs, SSL/TLS, cryptography in networks, and common attacks (DDoS, MITM).

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Socket Programming

Client-server model, socket API in Python/C, TCP and UDP socket programs.

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Cloud & SDN

Software-defined networking, network virtualisation, VPCs in AWS/Azure, and CDNs.

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Network Troubleshooting

Ping, traceroute, netstat, Wireshark, common connectivity issues, and their fixes.

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Frequently Asked Questions — Computer Networks

Where can I download free Computer Networks notes?
SII provides free Computer Networks study materials on this page. Browse chapter-wise notes, question papers, and revision guides prepared by our expert educators. Enrolled students get access to complete premium resources.
What topics are covered in Computer Networks at SII?
Our Computer Networks curriculum covers all major topics for B.Tech, BCA, Class 12 — including theory notes, solved examples, formulae sheets, and previous year exam questions. Each topic page has a dedicated notes section.
How are SII Computer Networks notes different from NCERT?
SII notes complement NCERT by providing extra solved examples, shortcut methods, common exam mistakes, important formulas, and concept summaries. They are specifically designed to help students score higher in board and competitive exams.
Can I access Computer Networks notes on mobile?
Yes! All SII study materials are fully mobile-optimised. You can browse, read, and download notes on any device — smartphone, tablet, or desktop — without any app download required.
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