	IP=0	- Dummy protocol for TCP
	ICMP=1	- Internet Control Message Protocol
	IGMP=2	- Internet Group Management Protocol
	IPIP=4	- IPIP tunnels (older KA9Q tunnels use 94)
	TCP=6	- Transmission Control Protocol	
	EGP=8	- Exterior Gateway Protocol
	PUP=12	- PUP protocol				
	UDP=17	- User Datagram Protocol		
	IDP=22	- XNS IDP protocol			
	RSVP=46	- RSVP protocol			
	GRE=47	- Cisco GRE tunnels (rfc 17011702)	
	IPV6=41	- IPv6-in-IPv4 tunnelling		
	PIM=103	- Protocol Independent Multicast	
	ESP=50  - Encapsulation Security Payload protocol 
	AH=51   - Authentication Header protocol       
	COMP=108 - Compression Header protocol 
	RAW=255	- Raw IP packets

# (C)   (Microsoft Corp.), 1993-1999
#
#     , 
#   RFC 1700 ( ).
#
# :
#
# <>  < >  [...]   [#<>]

ip       0     IP       # Internet protocol
icmp     1     ICMP     # Internet control message protocol
ggp      3     GGP      # Gateway-gateway protocol
tcp      6     TCP      # Transmission control protocol
egp      8     EGP      # Exterior gateway protocol
pup      12    PUP      # PARC universal packet protocol
udp      17    UDP      # User datagram protocol
hmp      20    HMP      # Host monitoring protocol
xns-idp  22    XNS-IDP  # Xerox NS IDP
rdp      27    RDP      # "reliable datagram" protocol
rvd      66    RVD      # MIT remote virtual disk
