diff --git a/presentations/03_TCPIP.pptx b/presentations/03_TCPIP.pptx
index a2065a6c122309d4371d30e174d37822c6a352c2..91cb16047cfd2e00036aec61e0571f01c26dd5ba 100644
Binary files a/presentations/03_TCPIP.pptx and b/presentations/03_TCPIP.pptx differ
diff --git a/presentations/04_TCPSocketsJava.pptx b/presentations/04_TCPSocketsJava.pptx
index 580d26aaeb1e2dc2b409b28e37484c8abbe45030..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391 100644
Binary files a/presentations/04_TCPSocketsJava.pptx and b/presentations/04_TCPSocketsJava.pptx differ
diff --git a/presentations/06_UDP_UserDatagramProtocol.pptx b/presentations/06_UDP_UserDatagramProtocol.pptx
index 7ed1193e78665add02af9d4a61a5f8e50e1f62d4..98d130f62bad21ead878a64992c9281f4014de93 100644
Binary files a/presentations/06_UDP_UserDatagramProtocol.pptx and b/presentations/06_UDP_UserDatagramProtocol.pptx differ