DIA vs ILL: Understanding Dedicated Internet Access
Dedicated Internet Access builds on a leased line with redundancy, managed security and stronger SLAs. Here is when you need it.
The terms Dedicated Internet Access (DIA) and Internet Leased Line (ILL) are often used interchangeably in India, and technically both describe dedicated, symmetric internet connectivity. At UbiFi, DIA is our premium tier — built specifically for mission-critical sites that cannot afford to go offline.
The shared foundation
Both DIA and ILL provide 1:1 dedicated bandwidth, symmetric upload and download speeds, static IPv4 blocks with IPv6, and contractual SLAs monitored by a 24/7 NOC.
What DIA adds
- Physically diverse dual last-mile: two fiber paths entering your premises by different routes, so a single cut does not cause an outage.
- Managed edge: your router and firewall are configured, patched and monitored by our engineers.
- Always-on DDoS protection: volumetric attacks are detected and scrubbed upstream before they fill your line.
- Stronger availability commitments: typically 99.9% with diverse paths.
- Monthly reporting: availability, latency, utilisation, incidents and security events.
Who needs DIA?
Banks, NBFCs and fintechs, hospitals and diagnostic chains, contact centres, e-commerce operations, payment processors, media companies streaming live content and corporate headquarters where hundreds of employees depend on cloud applications.
Cost vs risk
DIA costs more than a single leased line because it includes redundancy and managed services. Compare that premium with the cost of a few hours of downtime — lost transactions, idle staff, missed SLAs with your own customers — and DIA often pays for itself.
When a standard ILL is enough
Branch offices, back-office operations and sites with tolerable downtime can be well served by a single ILL with a broadband backup.
A combined approach
Many enterprises use DIA at headquarters and data centres, and ILL or business broadband at branches, all managed under one contract.
The bottom line
If your site must stay online through fiber cuts and cyber-attacks, choose DIA. For less critical locations, a standard ILL remains excellent value.
Learn more about Dedicated Internet Access (DIA) from UbiFi, or talk to our team.
Premium dedicated internet with dual last-mile, managed router, firewall and DDoS protection — engineered for mission-critical sites.
