Header:
=======

(every field has 8bits)

0					 	       7
| SRC | DST | REQ_ID | TYPE | JUMP | TTL | PAYLOAD_LEN |
| PAYLOAD ...


Description:
============

SRC 		: source node 51 -> 60
DST 		: final destination node 51-> 60
REQ_ID 		: request id number (unique) 0 -> 255
TYPE		: 00 for request, FF for reply
JUMP		: pointer to the payload byte  which identifies actual node
TTL		: normal TTL starts in a number 0 -> 255 and is substracted in each hop
PAYLOAD_LEN	: actual length of the payload
