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Appendix C. Lists of Reserved Ports, ICMP Types and Codes, and Internet Protocols
Protocol number Keyword Protocol
64 SAT-EXPAK SATNET and Backroom EXPAK
65 KRYPTOLAN Kryptolan
66 RVD MIT Remote Virtual Disk Protocol
68 any distributed file system
69 SAT-MON SATNET Monitoring
70 VISA VISA Protocol
75 PVP Packet Video Protocol
80 ISO-IP ISO Internet Protocol
84 TTP TTP
85 NSFNET-IGP NSFNET-IGP
86 DGP Dissimilar Gateway Protocol
87 TCF TCF
88 EIGRP EIGRP
91 LARP Locus Address Resolution Protocol
92 MTP Multicast Transport Protocol
93 AX.25 AX.25 Frames
94 IPIP IP-within-IP Encapsulation Protocol
95 MICP Mobile Internetworking Control Pro.
97 ETHERIP Ethernet-within-IP Encapsulation
98 ENCAP Encapsulation Header
99 any private encryption scheme
100 GMTP GMTP
115 L2TP Layer Two Tunneling Protocol
255 Reserved
IP intervals
This is a list of the IP addresses available for different netmasks. The first column shows the number of bits used for
the net address, i. e., is set to 1 in the netmask. The second column maps the number of bits to a netmask on the
usual octet-dot format. The third column shows the address class for this netmask.
The second table shows the IP address interval for each class.
1-set bits Mask IP address class
0 0.0.0.0 0
1 128.0.0.0 1
2 192.0.0.0 2
3 224.0.0.0 3
4 240.0.0.0 4
5 248.0.0.0 5
6 252.0.0.0 6
7 254.0.0.0 7
8 255.0.0.0 0
9 255.128.0.0 1
10 255.192.0.0 2
11 255.224.0.0 3
12 255.240.0.0 4
137