Appendix C: Ip Address, Subnet And Gateway - Canon IP100 User Manual

Appendix C: IP Address, Subnet and Gateway

This section discusses Communities, Gateways, IP Addresses and Subnet masking
Communities
A community is a string of printable ASCII characters that identifies a user group with
the same access privileges.
For security purposes, the SNMP agent validates requests before responding.
agent can be configured so that only trap managers that are members of a
community can send requests and receive responses from a particular community.
This prevents unauthorized managers from viewing or changing the configuration of
a device.
Gateways
Gateway, also referred to as a router, is any computer with two or more network
adapters connecting to different physical networks.
transmission of IP packets among networks on an Internet.
IP Addresses
Every device on an Internet must be assigned a unique IP (Internet Protocol) address.
An IP address is a 32-bit value comprised of a network ID and a host ID.
network ID identifies the logical network to which a particular device belongs.
host ID identifies the particular device within the logical network.
distinguish devices on an Internet from one another so that IP packets are properly
transmitted.
IP addresses appear in dotted decimal (rather than in binary) notation.
decimal notation divides the 32-bit value into four 8-bit groups, or octets, and
separates each octet with a period.
dotted decimal notation.
To accommodate networks of different sizes, the IP address has three divisions –
Classes A for large, B for medium and C for small.
network classes is the number of octets reserved for the network ID and the number
of octets reserved for the host ID.
Class Value of First
Octet
A 1-126
B 128-191
C 192-223
Any value between 0 and 255 is valid as a host ID octet except for those values the
InterNIC reserves for other purposes
Value Purpose
0, 255 Subnet masking
127 Loopback testing and interprocess communication on local devices
224-254 IGMP multicast and other special protocols.
WebCAM user manual
Appendix C: IP Address, Subnet and Gateway
For example, a common community name is "public."
For example, 199.217.132.1 is an IP address in
Network ID
First octet Last three octets
First two octets Last two octets
First tree octets Last octet
Gateways allow for
IP addresses
Dotted
The difference among the
Host ID Number of Hosts
The
The
The
16,387,064
64,516
254
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