2024-02-09 12:21:03

UNB/Year 4/Semester 2/CS3873/2024-02-09.md

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+Lecture Topic: Transport Layer overview
+
+Socket information is a tuple, port number is important
+
+# Transport Layer
+## UDP
+Connectionless transport protocol, no handshake, each segment is handled independently from others
+
+UDP segment is very simple: an 8 byte header and a payload.
+It has a source port, destination port, length and checksum
+
+The checksum in UDP is only for detection, not correction
+
+As messages are transported through layers, they acquire new headers that wrap the existing packet
+
+Checksum in UDP is actually optional but is required in TCP and IPv4