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Security Fundamentals & Crypto · Foundational

Split Tunneling

VPN configuration that sends only corporate traffic through the tunnel while other traffic goes directly to the internet.

Definition

Split tunneling reduces bandwidth on the VPN concentrator and improves performance for internet and SaaS traffic. It also means internet traffic bypasses corporate security inspection unless cloud-based controls are used. Full tunneling sends all traffic through the VPN for inspection.

Example

Microsoft 365 traffic is excluded from the VPN tunnel to improve Teams call quality.

Exam tip

Full tunnel = more security visibility; split tunnel = better performance but less control.

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