A circuit level gateway works at which of the
following layers of the OSI Model?
A. Layer 5 – Application
B. Layer 4 – TCP
C. Layer 3 – Internet protocol
D. Layer 2 – Data link
A circuit level gateway works at which of the
following layers of the OSI Model?
A. Layer 5 – Application
B. Layer 4 – TCP
C. Layer 3 – Internet protocol
D. Layer 2 – Data link