CS144-Lec02-Notes
CS144 Lec2 gitk: UI for git Reliability Reliable retrieval a piece of data (get data) Datagram is an unreliable abstraction (TCP/UDP Layer!) How to build reliable abstraction on the top of datagram(unreliable): Protocol client -> request -> server client wait for xx time to get reply if get reply -> done! it time expires, no answer -> repe..
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Important Abstraction: Datagrams "Best-effort Delivery" Features: has a "TO addres" (a computer's address) has a "FROM address" short text (~1kbyte, <1.5 kbyte) Possibilities a datagram could have From address (IPv4 32 bits/ IPv6 128 bits) To address (v4 32 bits/ v6 128 bits) Message: "hello" posibility: delivered, quickly delivered, wrong..
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