Multi-homed design

As explained in Acing the CCNA Exam: Volume 2 Advanced Networking and Security

A multi-homed design connects a network to multiple internet service providers, typically with one connection to each provider.

A multi-homed design connects a network to two or more internet service providers, using one connection to each provider. If one ISP has problems, the network can continue operating through another connection. This design suits enterprises that need more resilience than a single ISP can provide. section 16.2.5 section 16.4

Compare internet connection designs by redundancy, cost, and complexity:

• Single-homed: one connection to one ISP; common in SOHO networks and provides no redundancy. section 16.2.5
• Dual-homed: two connections to one ISP; improves connection redundancy but remains vulnerable to an outage affecting that ISP. section 16.2.5 section 16.4
• Multi-homed: one connection to each of two or more ISPs; protects against problems affecting one provider. section 16.2.5
• Dual multi-homed: two connections to each of two or more ISPs; provides the highest redundancy but costs more and adds complexity. section 16.2.5 section 16.4

Figure 16.12 internet connection designs. Single-homed = one connection to one ISP. Dual-homed = two connections to one ISP. Multi-homed = one connection to each of two (or more) ISPs. Dual multi-homed = two connections to each of two (or more) ISPs.

Compare the four connection patterns visually, from single-homed with no redundancy to dual multi-homed with the highest redundancy. section 16.2.5

How Acing the CCNA Exam: Volume 2 Advanced Networking and Security covers it

How deep it goes

Defines four connection patterns and compares their redundancy, cost, and complexity.

Examples

Uses single-, dual-, multi-, and dual multi-homed connection arrangements as comparative examples.

What you can do after

Evaluate internet connection designs by comparing provider resilience, redundancy, cost, and complexity.

How it connects

Relates internet service providers to single-homed, dual-homed, and dual multi-homed designs.

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Related concepts

• redundancyproduces · The presence of repeated, duplicate, or overlapping information, components, or capabilities in a system or dataset, whether intentional or unnecessary.
• designkind of · Design is the process of planning and specifying an artifact’s structure, behavior, or presentation, and the resulting arrangement, to meet intended purposes and constraints.
• dual-homed designcontrasts with · A dual-homed design is an internet connectivity arrangement with two connections to the same Internet service provider.
• single-homed designcontrasts with · A single-homed design is an internet connectivity arrangement with one connection to one Internet service provider.

This explainer was generated by Manning's knowledge graph from the text of Acing the CCNA Exam: Volume 2 Advanced Networking and Security. The section links point to the parts of the book it draws on.