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LAN Devices Overview

CISSP

  1. Repeaters
    • Function: Amplify data signals to extend their range.
    • Layer: Operates at the Physical Layer.
  2. Hubs
    • Function: Connect multiple LAN devices into a concentrator; acts as a multi-port repeater.
    • Layer: Operates at the Physical Layer.
  3. Bridges
    • Function: Forwards data to all other network segments if it’s not on the local segment.
    • Layer: Operates at Layer 2 (Data Link Layer), does not use IP addressing.
  4. Switches
    • Function: Sends data only to the specific destination address, acting as a multi-port bridge.
    • Layer: Operates at the Data Link Layer.
  5. Routers
    • Function: Opens data packets, reads hardware or network addresses, and forwards them to the correct network.
    • Layer: Operates at the Network Layer.
  6. Gateways
    • Function: Software or hardware that acts as an access point to another network or translates between different protocols.
    • Usage: Often used for connecting different network environments, such as LAN to WAN or different protocol systems.
  7. LAN Extenders
    • Function: Provide remote access, act as multi-layer switches that connect LANs over a WAN.
    • Usage: Extend the LAN by connecting it to remote networks.

These LAN devices are essential for building, extending, and managing local area networks, each playing a specific role in ensuring efficient and secure data communication.

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