diff --git a/ws2012/P2P/uebungen/4/src/node/Node.java b/ws2012/P2P/uebungen/4/src/node/Node.java
index ba11799a..5ca61392 100644
--- a/ws2012/P2P/uebungen/4/src/node/Node.java
+++ b/ws2012/P2P/uebungen/4/src/node/Node.java
@@ -178,7 +178,7 @@ public class Node {
         sendBroadcast(packet_id, command, data);
     }
 
-    void sendBroadcast(int packet_id, byte command, byte[] data) {
+    protected void sendBroadcast(int packet_id, byte command, byte[] data) {
         ByteBuffer buffer = ByteBuffer.allocate(BUF_SIZE);
 
         buffer.put(MessageType.BROADCAST);
@@ -215,19 +215,19 @@ public class Node {
 
     }
 
-    boolean hasAck(int ack_id) {
+    protected boolean hasAck(int ack_id) {
         return acks.containsKey(ack_id);
     }
 
-    Ack getAck(int ack_id) {
+    protected Ack getAck(int ack_id) {
         return acks.get(ack_id);
     }
     
-    Ack removeAck(int ack_id) {
+    protected Ack removeAck(int ack_id) {
         return acks.remove(ack_id);
     }
 
-    boolean addNeighbor(SocketAddress node) {
+    protected boolean addNeighbor(SocketAddress node) {
         if (!hasNeighbor(node)) {
             neighbors.add(node);
             return true;
@@ -242,7 +242,7 @@ public class Node {
      *            address to remove
      * @return True if an address was removed, else false
      */
-    boolean removeNeighbor(SocketAddress node) {
+    protected boolean removeNeighbor(SocketAddress node) {
         SocketAddress removed = null;
         int idToRemove = getNeighborId(node);
         if (idToRemove != -1) {