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For questions about OSI Layer 4 (transport layer).

26
votes
The three-way handshake is necessary because both parties need to synchronize their segment sequence numbers used during their transmission. For this, each of them sends (in turn) a SYN segment with …
answered Nov 4 '15 by dr_
0
votes
In general, nothing can be said about when an ACK is sent. This because the network protocol aims to optimize the sending, for instance by delaying the ACK and piggybacking it to another data frame in …
answered Feb 2 '17 by dr_
3
votes
From the wget manpage: GNU Wget is a free utility for non-interactive download of files from the Web. It supports HTTP, HTTPS, and FTP protocols, as well as retrieval through HTTP proxies. HTTP …
answered May 18 '16 by dr_