TCP-Segment: TCP-Header: Source Port (Quellport) 2 Byte Destination Port (Zielport) 2 Byte Sequence Number 4 Byte Acknlowledgement Number (Quittierungsnummer) 4 Byte Data Offset 4 Bit Reserved 4 Bit Control Flag 8 Bit (Recieve) Window 2 Byte Checksum 2 Byte Urgent Pointer 2 Byte Options 0-40 Byte IP-Paket - IPv4: Version 4 Bit (0 bis 3) IHL 4 Bit (3 bis 7) TOS 8 Bit (8 bis 15) Total Length 16 Bit (16 bis 31) Identification 16 Bit Flags 4 Bit Fragment Offset 28 Bit TTL 8 Bit Protokol 8 Bit Header Checksum 16 Bit Source Adress 32 Bit Destination Adress 32 Bit Options and Pading (optional) 32 Bit