CLICK FOR TIMESTAMPS TO SKIP AHEAD. Looking for a problem when something is broken is one thing. Analyzing performance and determining if there's a network problem is something else entirely. Here's a look at TCP performance with an analysis of sequence numbers, RTT, DUP Acks, Fast Retransmissions, Congestion window, and more.

Essential reading: https://packetbomb.com/understanding-throughput-and-tcp-windows/

Timestamps:
00:00 Super cool graphics where nothing happens
06:00 Actual start
09:01 Virtual Sharkfest
10:48 My new SMB Video
11:44 Recommended books
15:09 Who owns TCP? And why learn wireshark
18:47 What we're looking at in this video
20:31 Determining throughput
24:11 Total vs application throughput
26:19 IOGraph
30:20 Analyzing three way handshake and RTT
35:49 Looking for patterns
36:54 TCP packet behavior
38:38 Best performance graph - tcptrace
41:42 TCP slow start
45:08 Packet loss
45:48 Sequence number analysis
48:27 DUP Acks and SACK
50:55 Fast Retransmission and the packet train
53:42 Congestion control
55:17 Finding max throughput
58:18 Server side pcap
01:04:25 Wrapping up

PacketBomb Discord: https://discord.gg/ptZsHpS