Appendix; Addresses, Protocols, And Ports; Ipv4 Addresses And Subnet Masks - Cisco 7604 Configuration Manual

Addresses, Protocols, and Ports

This appendix provides a quick reference for IP addresses, protocols, and applications. This appendix
includes the following sections:
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IPv4 Addresses and Subnet Masks

This section describes how to use IPv4 addresses with FWSM. An IPv4 address is a 32-bit number
written in dotted-decimal notation: four 8-bit fields (octets) converted from binary to decimal numbers,
separated by dots. The first part of an IP address identifies the network on which the host resides, while
the second part identifies the particular host on the given network. The network number field is called
the network prefix. All hosts on a given network share the same network prefix but must have a unique
host number. In classful IP, the class of the address determines the boundary between the network prefix
and the host number.
This section includes the following topics:
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Catalyst 6500 Series Switch and Cisco 7600 Series Router Firewall Services Module Configuration Guide using ASDM
OL-20748-01
IPv4 Addresses and Subnet Masks, page E-1
IPv6 Addresses, page E-5
Protocols and Applications, page E-11
TCP and UDP Ports, page E-11
Local Ports and Protocols, page E-14
ICMP Types, page E-15
Classes, page E-2
Private Networks, page E-2
Subnet Masks, page E-2
A P P E N D I X
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E-1