COMMON LAYER 2 DEVICES AND FUNCTIONALITIES.

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Presentation transcript:

COMMON LAYER 2 DEVICES AND FUNCTIONALITIES

Introduction 7 6 5 4 3 2 1 Routers, PAD’s, X.25 switches Bridges, LAN switches, ATM switches and terminal servers Transceivers, repeaters, hubs, FDDI concentrators, MSAU’s, modems, terminal adapters, DSU’s, CSU’s, MUX and NIC’s 3 2 1

Bridges Bridges analyze incoming frames, make decisions based on the information and forward the frames to the destination Bridges operate at the Data Link layer, allowing them to rapidly forward traffic representing any network-layer protocol Bridges control data flow, handle transmission errors, provide physical addressing and manage access to the physical medium Bridges are capable of filtering frames based on any Layer 2 fields Bridges can be used to connect dissimilar networks, allowing communication between them. 7 6 5 4 3 2 1

Bridges

LAN Switches Switches provide dedicated bandwidth and high packet throughput to users and servers at low cost Switches are designed to work with the existing cable infrastructures so they can be installed with minimal disruption to existing networks Switches may replace shared hubs LAN switches are a type of fast multi-port bridge designed to increase the performance of the LAN by separating collision domains and selectively forwarding traffic to the appropriate segments LAN switches improve the performance of LANs as they create isolated collision domains LAN switches have the benefits of increased capacity, segmentation, parallel conversations and connectivity for LANs. 7 6 5 4 3 2 1

Switches