What Is SD-WAN?

Q: Can SD-WAN replace MPLS

Mostly yes, and in some cases hybrid MPLS + internet through SD-WAN provides the best balance of quality and cost.

Q: What size organization fits SD-WAN

Typically organizations with 3+ branches, heavy cloud usage, or 50+ user offices.

Q: How much does SD-WAN cost

Depends on site count and link speed, roughly 5,000 to 30,000 THB per site per month including hardware and subscription.

2026-05-07 3 min readSIPPER Team

SD-WAN is the modern WAN paradigm: software centrally manages multiple links, selecting the best path per application automatically. It replaces or augments traditional MPLS.

Definition

SD-WAN uses a centralized controller to manage edge devices at branches, performing application-aware path selection, e.g., voice over MPLS, backup over internet.

Usage

Multi-branch organizations use SD-WAN to reliably and affordably connect branches to data centers or cloud services (Microsoft 365, Google Workspace).

Related Concepts

SD-WAN often bundles with security stacks (firewall, IDS/IPS, ZTNA) into SASE (Secure Access Service Edge). Example products: FortiGate SD-WAN, Cisco Meraki MX, VMware VeloCloud, Cato Networks.

Frequently Asked Questions

Can SD-WAN replace MPLS

What size organization fits SD-WAN

How much does SD-WAN cost

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