D-Link DES-3326, Руководство пользователя

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24-port NWay Ethernet Switch User’s Guide
Introduction 5
network will also become the termination point for Virtual
Private Networks (VPNs) for remote office access to the
enterprise infrastructure.
The DES-3326 can then be thought of as accomplishing two
objectives. First as a tool to provide high-performance access to
enterprise data servers and infrastructure, and second, to
enhance the performance of network equipment already installed.
Many network segments display poor performance, but the
Ethernet wire is only carrying a fraction of its total traffic
capacity. The problem is not the network, but the ability of the
connected devices utilize the full capacity of the network. The
DES-3326 can eliminate network bottlenecks to high-traffic areas,
and improve the utilization of the network’s installed bandwidth.
The Functions of a Layer 3 Switch
Traditional routers, once the core components of large networks,
became an obstacle to the migration toward next-generation
networks. Attempts to make software-based routers forward
packets more quickly were inadequate.
A layer 3 switch does everything to a packet that a traditional
router does:
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Determines forwarding path based on Layer 3
information
?? Validates the integrity of the Layer 3 header via
checksum
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Verifies packet expiration and updates accordingly
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Processes and responds to any optional information