Business Data Communication and Networking

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Switched and Routed Backbones

A switched backbone is a type of network backbone that uses network switches to connect different network segments or devices.

  • It is commonly used within a single building or a small campus environment and is designed to improve communication speed and reduce traffic bottlenecks.
  • They are ideal for small to medium-sized organizations, such as offices or schools, where rapid data communication and simple management are required.

Key Features

  • Layer 2 Switching: Operates at the Data Link Layer, where switches direct data based on MAC addresses.
  • Centralized Design: Typically involves a central switch or a hierarchy of switches to connect various sub-networks.
  • High Speed: Switches provide direct data transmission paths, minimizing delays and improving performance.
  • Scalability: Can easily add or remove switches and devices without disrupting the network.

Advantages

  • Faster data transfer due to dedicated communication paths.
  • Simplified network management with centralized control.
  • Cost-effective for smaller networks with limited routing needs.

Disadvantages

  • Limited routing capabilities (no Layer 3 functionality).
  • Potential for broadcast storms if not properly configured.

A routed backbone is a network backbone that uses routers to connect different network segments.

  • It operates at the Network Layer (Layer 3) and routes data between segments based on logical IP addresses.
  • They are suitable for large organizations, such as multinational corporations or universities, where complex network segmentation and robust security are essential.

Key Features

  • Layer 3 Routing: Uses routing protocols to find the best path for data packets.
  • Segmentation: Divides the network into multiple subnets, improving traffic management.
  • Security and Control: Offers advanced security features, such as firewalls and access control, to regulate data flow.
  • Redundancy: Supports failover mechanisms to maintain connectivity during device or link failures.

Advantages

  • Enhanced traffic control and network segmentation.
  • Supports complex network configurations with multiple subnets.
  • Improved security through isolation of sub-networks.

Disadvantages

  • Higher cost due to more sophisticated equipment and configuration.
  • Greater complexity in setup and maintenance.

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