With quantum computing nearing practical implementation in 2025, concerns over the vulnerability of
classical cryptographic algorithms in cloud networking have intensified. This research addresses the urgent need for
quantum-resilient communication protocols in federated and multi-tenant cloud environments. The study explores the
integration of post-quantum cryptography (PQC) into cloud-native networking layers, focusing on protocols such as
TLS 1.3, IPsec, and gRPC. It also investigates the performance trade-offs, key management challenges, and compliance
implications of transitioning to PQC in large-scale, geographically distributed cloud systems. A hybrid implementation
model is proposed, blending classical and quantum-safe algorithms to ensure forward secrecy and interoperability
during the migration phase. Experimental results suggest that lattice-based and hash-based key exchange mechanisms
can be integrated into existing protocols with acceptable performance overhead and minimal disruption
