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4.1.1. Load Balancer SKUs and Types

SKUs:
FeatureBasicStandard
Backend pool size300 instances1,000 instances
Health probesTCP, HTTPTCP, HTTP, HTTPS
Availability zonesNoZone-redundant
SLANo99.99%
SecurityOpen by defaultClosed by default (requires NSG)
Outbound rulesNoYes
Global tierNoYes (cross-region)

💡 First Principle: Always use Standard SKU. Basic is being deprecated and lacks enterprise features.

Types:
TypeFrontend IPUse Case
PublicPublic IPInternet-facing applications
InternalPrivate IPInternal applications, multi-tier
GatewayTransparentInline NVA insertion
Regional vs Cross-Region:
ScopeRegionalCross-Region (Global)
LatencyLowestAdds hop
FailoverWithin regionBetween regions
Use caseMost workloadsDR, global presence
Alvin Varughese
Written byAlvin Varughese
Founder•15 professional certifications