diff --git a/hw2/src/impl/GBNTReceiver.java b/hw2/src/impl/GBNTReceiver.java
index a45f83d..3f63d1e 100644
--- a/hw2/src/impl/GBNTReceiver.java
+++ b/hw2/src/impl/GBNTReceiver.java
@@ -1,3 +1,14 @@
+/*
+ * GBNTReceiver - Claudio Maggioni (2020)
+ * NTW2020 HW2
+ *
+ * No external source was used to create this file, other than regular course material.
+ *
+ * Note on implementation: change value of constant RECEIVER_TIMEOUT_MS to change the
+ * value of the receiver disconnection timeout.
+ */
+
+
 package impl;
 
 import transport.Receiver;
@@ -47,7 +58,6 @@ public class GBNTReceiver extends Receiver implements TimeoutAction {
     @Override
     protected void unreliableReceive(byte[] bytes, int offset, int length) {
         if (state == State.CLOSED) return;
-        //System.out.println("State: " + state + " receiving: " + length);
         cancelTimeout(this);
         setTimeout(RECEIVER_TIMEOUT_MS, this);
         switch(this.state) {
diff --git a/hw2/src/impl/GBNTSender.java b/hw2/src/impl/GBNTSender.java
index 72192a8..7aa834d 100644
--- a/hw2/src/impl/GBNTSender.java
+++ b/hw2/src/impl/GBNTSender.java
@@ -1,3 +1,13 @@
+/*
+ * GBNTSender - Claudio Maggioni (2020)
+ * NTW2020 HW2
+ *
+ * No external source was used to create this file, other than regular course material.
+ *
+ * Note on implementation: change value of constant W to change the size of the otherwise
+ * fixed window.
+ */
+
 package impl;
 
 import transport.TimeoutAction;
@@ -27,8 +37,6 @@ public class GBNTSender extends transport.Sender implements TimeoutAction {
     private final Map<Character, Packet> packetMap = new HashMap<>();
     private Semaphore s = new Semaphore(0);
 
-    private static final int MAX_PACKET_SIZE = 128;
-
     private class Packet {
         private final byte[] contents;
         private final char sequence;