Which of the following layers is layer 4 in the OSI model?

Which of the following layers is layer 4 in the OSI model?

• Transport
• Physical
• Network
• Application 

EXPLANATION

Transport (Layer 4)

OSI Model, Layer 4, provides transparent transfer of data between end systems, or hosts, and is responsible for end-to-end error recovery and flow control. It ensures complete data transfer. Layer 4 Transport examples include SPX, TCP, UDP.Sep 24, 1999