A collapsed backbone network, also known as a “flat backbone,” is a type of network topology where all the network segments connect directly to a central device. This central device could be a router, switch, or hub, depending on the design of the network. The term “collapsed” is used because the traditional multi-tiered hierarchy of a network is reduced or “collapsed” into a single tier.
Key Features of a Collapsed Backbone Network:
- Single Central Device: In a collapsed backbone design, all devices and segments (like LANs) connect to a single central device.
- Simplified Topology: The design is straightforward and is typically easier to manage than more complex hierarchical designs, especially for smaller networks.
- Centralized Management: Given that all connections terminate at a single point, network management, troubleshooting, and monitoring become centralized.
- Ease of Expansion: Adding additional devices or segments to the network typically involves connecting them to the central device.
Advantages of a Collapsed Backbone Network:
- Cost: It can be less expensive than more complex designs because it requires fewer devices and interconnections.
- Performance: Since traffic between segments only has to pass through the central device (and not multiple devices), latency can be minimized and performance might be optimized.
- Management: With fewer devices and connections to manage, it can simplify network management and troubleshooting.
- Scalability: It’s easy to expand the network by adding more connections to the central device.
Disadvantages of a Collapsed Backbone Network:
- Single Point of Failure: If the central device fails, all connected segments could lose connectivity.
- Bandwidth Limitations: As all traffic flows through a single device, it might become a bottleneck if the network grows too large.
- Less Redundancy: Compared to distributed backbone designs which may have multiple paths between segments.
Collapsed backbone designs are particularly common in small to medium-sized organizations or within specific areas of a larger enterprise, like a single building or floor. However, for larger networks spread out over multiple locations, a more distributed or hierarchical backbone design might be preferred to optimize performance and reliability.
Key terms in plain language
Open a term for a concise explanation of language used on this page.
Fiber Internet
Internet delivered through strands of glass using light. Fiber commonly supports high capacity, low latency, and strong upload performance, but availability must be confirmed for the exact address.
Bandwidth
The amount of data a connection can carry in a given time, usually measured in Mbps or Gbps. More bandwidth supports more users, devices, and simultaneous applications.
Latency
The time it takes data to travel between two points. Lower latency improves voice, video meetings, cloud applications, gaming, and other real-time services.
Broadband
A general term for always-on, high-speed Internet access. Broadband can be delivered over fiber, cable, DSL, fixed wireless, cellular, or satellite networks.
Dedicated Internet Access (DIA)
A business-grade Internet connection with capacity dedicated to the customer rather than shared in the same way as typical consumer broadband. It often includes symmetrical speeds and an SLA.
SD-WAN
Software-defined wide area networking. It manages multiple connections and chooses paths based on application needs, performance, and policy to improve resilience and control.