1 / 6

Bridge Software

Bridge Software A bridge connects networks and forwards frames from one network to another. PORTS A B E F BRIDGE C D G H A B E F BRIDGE C D G H Selective Forwarding If A sends a frame to E - the frame must be forwarded by the bridge.

johana
Download Presentation

Bridge Software

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Bridge Software • A bridge connects networks and forwards frames from one network to another. PORTS A B E F BRIDGE C D G H

  2. A B E F BRIDGE C D G H Selective Forwarding • If A sends a frame to E - the frame must be forwarded by the bridge. • If A sends a frame to B - there is no reason to forward the frame.

  3. Bridge Database • The bridge needs a database that contains information about which hosts are on which network. • The realistic options are: • The system administrator can create and maintain the database. • The bridge can acquire the database on the fly. Hard to add new computers Some loss of efficiency

  4. Learning the host mapping • The bridge forwards packets for which it does not know which network the destination is on. • Everytime the bridge forwards a packet it can record the network on which the sender is located. • Each host mapping expires when it is unused for a “long” period of time.

  5. Learning Bridge • A host can be moved to another network. • New hosts can be added at any time. • Requires no setup information from humans. • One MAJOR flaw:

  6. What is the problem ? Bridge 1 0 1 D A E B F C Bridge 2 0 1

More Related