networking-diag

TLS handshake failures stem from certificate validation, cipher suite mismatches, or protocol version incompatibility. Network.framework diagnostics reveal the exact failure point: inspect TLS configuration, validate certificate chains, check supported ciphers, and test against varied network conditions on real devices to isolate root cause.

Connection timeouts and drops on real devices often involve network condition changes, proxy interference, or state management gaps. Systematic diagnostics track connection state history, log state transitions, validate proxy settings, and test across cellular and WiFi to pinpoint whether the issue is app-level or network-environment-driven.

Data arrival and performance issues require tracking connection states, inspecting TLS configuration, and validating network paths. Capture packet-level behavior, cross-validate across multiple network conditions, and compare real-device results against simulator behavior to distinguish app logic from platform or network-specific root causes.

Yes. Network.framework diagnostics include TLS configuration inspection and cross-network validation to surface proxy or VPN interference. Logging connection state history and testing across different network environments reveals when proxies intercept, modify, or block traffic.

Simulators mask real-world conditions like packet loss, latency variance, and hardware network state changes. Real-device diagnostics enforce mandatory logging, state history tracking, and cross-network validation to capture production failure scenarios that simulators cannot reproduce.

Packet capture complements Network.framework diagnostics by revealing network-layer behavior. Diagnostics focus on connection state and TLS configuration; packet capture shows actual traffic, timing, and protocol behavior to validate findings and identify network-path or carrier-level issues.