Authentication; Packet Forwarding - D-Link DES-3326 User Manual

DES-3326 Layer 3 Fast Ethernet Switch User's Guide
Sending and receiving SNMP packets through the IP
protocol.
Collecting information about the status and current
configuration of network devices.
Modifying the configuration of network devices.
The DES-3326 has a software program called an 'agent' that
processes SNMP requests, but the user program that makes the
requests and collects the responses runs on a management station
(a designated computer on the network). The SNMP agent and the
user program both use the UDP/IP protocol to exchange packets.

Authentication

The authentication protocol ensures that both the router SNMP
agent and the remote user SNMP application program discard
packets from unauthorized users. Authentication is accomplished
using 'community strings', which function like passwords.
remote user SNMP application and the router SNMP must use the
same community string. SNMP community strings of up to 20
characters may be entered under the Remote Management Setup
menu of the console program.

Packet Forwarding

The Switch enters the relationship between destination MAC or IP
addresses and the Ethernet port or gateway router the destination
resides on into its forwarding table. This information is then used
to forward packets. This reduces the traffic congestion on the
network, because packets, instead of being transmitted to all ports,
are transmitted to the destination port only. Example: if Port 1
Switch Management and Operating Concepts
The
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