Added content.

- Notes
- Practical (Handouts, Softcopies, Write-ups)
- Question Papers
- DISCLAIMER file and motto
Lastly, updated README file.

DISCLAIMER.md

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+# DISCLAIMER
+
+Disclaimer for [ComputerNetworksAndSecurity](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity) repository under [sppu-te-comp-content](https://git.kska.io/sppu-te-comp-content) organization.
+
+---
+
+- Please be advised that this repository ([ComputerNetworksAndSecurity](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity)), its organization ([sppu-te-comp-content](https://git.kska.io/sppu-te-comp-content)), and all of its content are entirely independent and not associated to, and/or affiliated with SPPU (Savitrbai Phule Pune University, Pune) and/or any of its colleges, nor with [KSKA Git](https://git.kska.io). The materials provided within, including assignments from our contributors and notes from our professors, are solely for educational purposes and convenience.
+
+- KSKA Git serves merely as a platform for this content and does not imply any association and/or endorsement from SPPU or KSKA Git. It is important to recognize that the organization (sppu-te-comp-content) and all of its repositories in KSKA Git operates independently, and any references to educational institutions or platforms are purely for informational clarity.
+
+- Furthermore, it is emphasized that the content available within this repository remains meticulously curated to align with the latest 2019 SPPU syllabus for computer engineering. Our commitment to accuracy ensures that the materials provided reflect the current academic standards prescribed by SPPU, offering students a reliable resource to supplement their studies.
+
+---

README.md

@@ -1,3 +1,74 @@
 # Computer Networks and Security (CNS)
 
+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.
+
+---
+
+> [!TIP]
+> Want to contribute? Start by [opening an issue](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/issues) in this repository!
+
+## Index
+
+### Notes
+
+1. [Unit 1 - Introduction To Computer Networks](Notes/Unit%201%20-%20Introduction%20To%20Computer%20Networks)
+2. [Unit 2 - Data Link Layer](Notes/Unit%202%20-%20Data%20Link%20Layer)
+3. [Unit 3 - Network Layer](Notes/Unit%203%20-%20Network%20Layer)
+4. [Unit 4 - Transport Layer](Notes/Unit%204%20-%20Transport%20Layer)
+5. [Unit 5 - Application Layer](Notes/Unit%205%20-%20Application%20Layer)
+6. [Unit 6 - Security](Notes/Unit%206%20-%20Security)
+
+### Assigments
+
+> Each folder contains **handout**, **write-up** and **softcopy** (i.e. code + output).
+
+1. [A1 - Wired LAN using switch](Practical/Assignment-A1)
+2. [A2 - Network types, topologies and transmission media](Practical/Assignment-A2)
+3. [A3 - Error detection and correction using Hamming code and CRC](Practical/Assignment-A3)
+4. [A4 - Sliding Window Protocol](Practical/Assignment-A4)
+5. [B5 - Subnetting and subnet mask](Practical/Assignment-B5)
+6. [B6 - Link state & distance vector](Practical/Assignment-B6)
+7. [B7 - RIP/OSPF/BGP](Practical/Assignment-B7)
+8. [B8 - TCP Socket](Practical/Assignment-B8)
+9. [B9 - UDP Protocol](Practical/Assignment-B9)
+10. [C10 - DNS](Practical/Assignment-C10)
+11. [C11 - DHCP](Practical/Assignment-C11)
+12. [C12 - TCP & HTTP traffic capture using Wireshark](Practical/Assignment-C12)
+13. [C13 - Analyse HTTP, HTTPS & TCP Protocols](Practical/Assignment-C13)
+14. [C14 - SSL Protocol](Practical/Assignment-C14)
+
+> [Practical dates (all batches)](Practical/CNSL%20-%20Practical%20dates.pdf)
+
+### Question Papers
+
+- [IN-SEM](Question%20Papers/IN-SEM)
+- [END-SEM](Question%20Papers/END-SEM)
+
+> [Important VIVA Questions (with answers)](Question%20Papers/CNSL%20-%20Important%20Viva%20Questions%20%28Answers%29.pdf)
+
+> [Sample Photocopy (END-SEM)](Question%20Papers/CNS%20-%20Sample%20Photocopy%20-%20END-SEM%20%282019%20Pattern%29.pdf)
+
+> [Sample IN-SEM Unit Test Paper](Question%20Papers/CNS%20-%20Unit%20Test%20Sample%20Paper%20%28IN-SEM%2C%202019%20Pattern%29.pdf)
+
+---
+
+## Miscellaneous
+
+**-> Disclaimer:** Please read the [DISCLAIMER](DISCLAIMER.md) file for important information regarding the contents of this repository.
+
+**-> Note:** Content such as codes, printable outputs (softcopies), write-ups and question papers is provided by us, i.e. our contributors. You are free to use this content however you wish, without any restrictions. Some of the notes and handouts have been provided by our professors, thus to use them for anything other than educational purposes, please contact them.
+
+**-> Maintained by:**
+- [notkshitij](https://git.kska.io/notkshitij)
+
+**->** Repository icon from [Icons8](https://icons8.com/).
+
+**-> Motto:**
+
+![Making information freely accessible to everyone.](motto.jpg)
+
+**-> Keywords:**
+
+SPPU, Savitribai Phule Pune University, Pune University, Computer Engineering, COMP, Third Year, TE, Semester 5, SEM-5, Computer Networks and Security, CNS, CNS codes, CNS handouts, CNS assignments, CNS write-ups, CNS code outputs, CNS printable outputs, CNS PYQs, CNS question papers
+
 ---