Interview Q&A / Computer Networks
Computer Networks interview questions
What happens when you open a website, TCP vs UDP, DNS and HTTP.
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- What is head-of-line blocking, and how do HTTP/2 and HTTP/3 deal with it?
Head-of-line blocking is when one slow or lost item holds up everything queued behind it. HTTP/1.1 blocks at the request level, HTTP/2 fixes that with multiplexing but still blocks at the TCP level on packet loss, and HTTP/3 over QUIC removes even that.
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