diff --git a/examples/src/UdpExamples/UnicastUdpReceiver.java b/examples/src/UdpExamples/UnicastUdpReceiver.java
index 7bc05fb2b31412a200efdedf9aaacbad60771465..a6e3acc6f05a3b92374229bc0700700e47794f75 100644
--- a/examples/src/UdpExamples/UnicastUdpReceiver.java
+++ b/examples/src/UdpExamples/UnicastUdpReceiver.java
@@ -51,7 +51,7 @@ public class UnicastUdpReceiver
             DatagramPacket receivePacket = new DatagramPacket(byteArray, byteArray.length);
             
             ByteArrayInputStream bais = new ByteArrayInputStream(byteArray);
-            DataInputStream dis = new DataInputStream(bais);
+            DataInputStream       dis = new DataInputStream(bais);
             
             boolean       isEvenParity;
             int           packetCount = 0;
@@ -102,7 +102,7 @@ public class UnicastUdpReceiver
         finally // clean up prior to exit, don't want to leave behind zombie socket
         {
             if (udpSocket != null)
-                udpSocket.close();
+                udpSocket.close(); // making sure the perhaps-scarce resource is released
             System.out.println(UnicastUdpReceiver.class.getName() + " complete."); // all done
         }
     }
diff --git a/presentations/06_UDP_UserDatagramProtocol.pptx b/presentations/06_UDP_UserDatagramProtocol.pptx
index 9b5dfe152b253c4398b46ebd9dc7468840ef48f2..73d52897fd9038e964e804cd65f65058963b1f48 100644
Binary files a/presentations/06_UDP_UserDatagramProtocol.pptx and b/presentations/06_UDP_UserDatagramProtocol.pptx differ
diff --git a/presentations/07_NetworkScalability.pptx b/presentations/07_NetworkScalability.pptx
index 17ac41ca94694f8ce0c67ff31bead3bab2e7531c..24aa842b5144d027360522f81c4cef8d9a481544 100644
Binary files a/presentations/07_NetworkScalability.pptx and b/presentations/07_NetworkScalability.pptx differ