- * <center><table><tr><td><b>Top</b> <td> [\ref index]::[\ref GRAS_API]
- * <tr><td><b>Prev</b> <td> [\ref GRAS_dd]
- * <tr><td><b>Next</b> <td> [\ref GRAS_msg]
- * <tr><td><b>Down</b> <td> [\ref GRAS_sock_create] </table></center>
+ * The model of communications in GRAS is very close to the BSD socket one.
+ * To get two hosts exchanging data, one of them need to open a
+ * <i>server</i> socket on which it can listen for incoming messages and the
+ * other one must connect a <i>client</i> socket onto the server one.