Ping!

 
  Bit 0 – 7 Bit 8 – 15 Bit 16 – 23 Bit 24 – 31
IP Header
(20 bytes)
Version/IHL Type of service Length
Identification flags and offset
Time To Live (TTL) Protocol Checksum
Source IP address
Destination IP address
ICMP Payload
(8+ bytes)
Type of message Code Checksum
Quench
Data (optional)

Something to say...?