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# Computer Networks and Security (CNS)
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This Git repository is a comprehensive resource for the Computer Networks and Security (CNS) course under the SPPU 2019 syllabus. It includes materials on fundamental concepts such as network architectures, protocols, and technologies, as well as practical implementations of client-server applications and insights into the data link layer and routing protocols. The repository also covers the application layer's role and essential network security topics, providing students with the knowledge and skills needed to master the course outcomes effectively.
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## Index
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### Notes
1. [Unit 1 - Introduction To Computer Networks ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Notes/Unit%201%20-%20Introduction%20To%20Computer%20Networks )
2. [Unit 2 - Data Link Layer ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Notes/Unit%202%20-%20Data%20Link%20Layer )
3. [Unit 3 - Network Layer ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Notes/Unit%203%20-%20Network%20Layer )
4. [Unit 4 - Transport Layer ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Notes/Unit%204%20-%20Transport%20Layer )
5. [Unit 5 - Application Layer ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Notes/Unit%205%20-%20Application%20Layer )
6. [Unit 6 - Security ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Notes/Unit%206%20-%20Security )
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### Assigments
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> [Practical dates (all batches)](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/CNSL%20-%20Practical%20dates.pdf)
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##### A1 - Wired LAN using switch
- [Handout-A1 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Handouts/Handout-A1.pdf )
- [Write-up - A1 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Write-ups/Write-up%20-%20A1.pdf )
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> [!NOTE]
> No code or output for assignment A1.
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##### A2 - Network types, topologies and transmission media
- [Handout-A2 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Handouts/Handout-A2.pdf )
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- [Write-up - A2 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Write-ups/Write-up%20-%20A2.pdf )
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- [Output-A2 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Printable%20outputs/Output-A2.pdf )
> [!NOTE]
> No code for assignment A2.
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##### A3 - Error detection and correction using Hamming code and CRC
- [Code-A3 (CRC) ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Codes/Code-A3%20%28CRC%29.cpp )
- [Code-A3 (Hamming Code) ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Codes/Code-A3%20%28Hamming%20Code%29.cpp )
- [Handout-A3 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Handouts/Handout-A3.pdf )
- [Write-up - A3 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Write-ups/Write-up%20-%20A3.pdf )
- [Output-A3 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Printable%20outputs/Output-A3.pdf )
##### A4 - Sliding Window Protocol
- [Code-A4 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Codes/Code-A4%20%28Sliding%20Window%29.cpp )
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- [Handout-A4 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Handouts/Handout-A4.pdf )
- [Write-up - A4 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Write-ups/Write-up%20-%20A4.pdf )
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- [Output-A4 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Printable%20outputs/Output-A4.pdf )
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##### B5 - Subnetting and subnet mask
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- [Code-B5 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Codes/Code-B5.cpp )
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- [Handout-B5 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Handouts/Handout-B5.pdf )
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- [Write-up - B5 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Write-ups/Write-up%20-%20B5.pdf )
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- [Output-B5 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Printable%20outputs/Output-B5.pdf )
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##### B6 - Link state & distance vector
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- [Code-B6 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Codes/Code-B6.py )
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- [Handout-B6 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Handouts/Handout-B6.pdf )
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- [Write-up - A6 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Write-ups/Write-up%20-%20B6.pdf )
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- [Output-B6 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Printable%20outputs/Output-B6.pdf )
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##### B7 - RIP/OSPF/BGP
- [Handout-B7 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Handouts/Handout-B7.pdf )
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- [Write-up - A7 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Write-ups/Write-up%20-%20B7.pdf )
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- [Output-B7 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Printable%20outputs/Output-B7.pdf )
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##### B8 - TCP Socket
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- [Code-B8 (Client) ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Codes/Code-B8%20%28Client%29.py )
- [Code-B8 (Server) ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Codes/Code-B8%20%28Server%29.py )
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- [Handout-B8 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Handouts/Handout-B8.pdf )
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- [Write-up - B8 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Write-ups/Write-up%20-%20B8.pdf )
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- [Output-B8 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Printable%20outputs/Output-B8.pdf )
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##### B9 - UDP Protocol
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- [Code-B9 (Sender) ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Codes/Code-B9%20%28Sender%29.py )
- [Code-B9 (Receiver) ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Codes/Code-B9%20%28Receiver%29.py )
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- [Handout-B9 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Handouts/Handout-B9.pdf )
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- [Write-up - B9 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Write-ups/Write-up%20-%20B9.pdf )
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- [Output-B9 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Printable%20outputs/Output-B9.pdf )
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##### C10 - DNS
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- [Code-C10 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Codes/Code-C10.py )
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- [Handout-C10 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Handouts/Handout-C10.pdf )
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- [Write-up - C10 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Write-ups/Write-up%20-%20C10.pdf )
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- [Output-C10 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Printable%20outputs/Output-C10.pdf )
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##### C11 - DHCP
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- [Code-C11 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Codes/Code-C11.py )
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- [Handout-C11 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Handouts/Handout-C11.pdf )
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- [Write-up - C11 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Write-ups/Write-up%20-%20C11.pdf )
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- [Output-C11 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Printable%20outputs/Output-C11.pdf )
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##### C12 - TCP & HTTP traffic capture using Wireshark
- [Handout-C12 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Handouts/Handout-C12.pdf )
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- [Write-up - C12 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Write-ups/Write-up%20-%20C12.pdf )
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- [Output-C12 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Printable%20outputs/Output-C12.pdf )
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##### C13 - Analyse HTTP, HTTPS & TCP Protocols
- [Handout-C13 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Handouts/Handout-C13.pdf )
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- [Write-up - C13 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Write-ups/Write-up%20-%20C13.pdf )
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##### C14 - SSL Protocol
- [Handout-C14 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Handouts/Handout-C14.pdf )
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- [Write-up - C14 ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Write-ups/Write-up%20-%20C14.pdf )
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### Question Papers
- [IN-SEM ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Question%20Papers/IN-SEM )
- [END-SEM ](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Question%20Papers/END-SEM )
> [Sample Photocopy (END-SEM)](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Question%20Papers/CNS%20-%20Sample%20Photocopy%20-%20END-SEM%20%282019%20Pattern%29.pdf)
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> [Sample IN-SEM Unit Test Paper](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Question%20Papers/CNS%20-%20Unit%20Test%20Sample%20Paper%20%28IN-SEM%2C%202019%20Pattern%29.pdf)
