diff --git a/cpp/zmq/req-rep/client_connect_multiple_server.cpp b/cpp/zmq/req-rep/client_connect_multiple_server.cpp
index 1cabd5f..e200bc0 100644
--- a/cpp/zmq/req-rep/client_connect_multiple_server.cpp
+++ b/cpp/zmq/req-rep/client_connect_multiple_server.cpp
@@ -25,9 +25,12 @@ int main (int argc, char *argv[])
     socket.connect(transport);
   }
 
+  char request_data[1024];
+  i = 0;
   while (true){
       zmq::message_t request (1024);
-      memcpy ((void *) request.data (), "Hello", 6);
+      snprintf(request_data, 1024, "Hello %08d", i++); 
+      memcpy ((void *) request.data (), request_data, strlen(request_data));
       socket.send (request);
       zmq::message_t reply;
       socket.recv (&reply);
diff --git a/cpp/zmq/req-rep/server_arg_port.cpp b/cpp/zmq/req-rep/server_arg_port.cpp
index 6e2b610..d1ccabe 100644
--- a/cpp/zmq/req-rep/server_arg_port.cpp
+++ b/cpp/zmq/req-rep/server_arg_port.cpp
@@ -19,17 +19,18 @@ int main (int argc, char *argv[])
   snprintf(transport, 255, "tcp://*:%s", argv[1]);
   socket.bind (transport);
 
-  char response[512]; 
-  memset(response, 0, 512);
-  snprintf(response, 512, "Response from server lisetning on %s", argv[1]);
+  char response[2048]; 
+  memset(response, 0, 2048);
+  snprintf(response, 2048, "Response from server lisetning on %s", argv[1]);
   int i = strlen(response);
   int times = 0;
   
   while (true){
       zmq::message_t request;
       socket.recv (&request);
-      zmq::message_t reply (512);
-      snprintf(response + i , 512, " #%d", times++);
+      zmq::message_t reply (2048);
+      snprintf(response + i , 2048, " #%d -- request data: %s", 
+              times++, (char *)request.data());
       memcpy ((void *) reply.data (), response, strlen(response));
       socket.send (reply);
   }