Tripp Lite SNMP Solo MT-SE-37/02 User Manual

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This appendix has three sections: Reference, 

Glossary, and

Troubleshooting.

This section discusses Communities, IP Addresses, Sub net
masking, and routers/gateways.

A community is a string of printable ASCII characters that
identifies a user group with the same access privileges. For
example, a common community name is “public.”

For security purposes, the SNMP agent validates requests
before responding. The 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.

Every device on an internetwork 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. The network ID
identifies the logical network to which a particular device
belongs. The host ID identifies the particular device within the
logical network. IP addresses distinguish devices on an
internetwork from one another so that IP packets are properly
transmitted.

IP addresses appear in dotted decimal (rather than in binary)
notation. Dotted decimal notation divides the 32-bit value into
four 8-bit groups, or octets, and separates each octet with a
period. For example, 199.217.132.1 is an IP address in 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. The difference among the network classes is the