Main

Transport layer- Layer 4
End to End Transport of data
TCP/UCP for management and sending of our data
TCP -
Connection Oriented, reliable, slow
Uses a 3-way handshake, to ensure transmission was succsessful
Syn > Syn/Ack > Ack
UDP -
Connectionless, unreliable, fast
No handshaking
used for streaming, voip, internet relat, chat

Ports are added at this level

netstat and nmap can be used to view ports

Flow control take place at this level

Error detection and recovery take place at this layer

PDU/Protocol Data Unit - Segment or Datagram
Protocols operating at the Transport layer include netstat and UDP