diff --git a/README.md b/README.md
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+++ b/README.md
@@ -30,6 +30,7 @@ This Git repository is a comprehensive resource for the Computer Networks and Se
 ### Write-ups
 
 1. [Write-up - A1](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Write-ups/Write-up%20-%20A1.pdf)
+2. [Write-up - A4](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Write-ups/Write-up%20-%20A4.pdf)
 
 ### Question Papers
 
diff --git a/Write-ups/Write-up - A4.pdf b/Write-ups/Write-up - A4.pdf
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Binary files /dev/null and b/Write-ups/Write-up - A4.pdf differ