System Design (50 Qs)•Part 4: API Design, Security & Edge Networking (37 - 43)
TLS 1.3 Handshake & Zero Round-Trip Time (0-RTT) Resumption.
In Simple Words: TLS 1.3 reduces the handshake from two round-trips (2-RTT in TLS 1.2) to a single round-trip (1-RTT). 0-RTT Resumption allows returning clients to send encrypted application data in the very first flight.