The OSI model, introduced by the International Organization for Standardization in 1984, stands for Open System Interconnection model and describes how data is transferred between computers. It consists of seven layers that facilitate communication over a local area network (LAN) using network interface cards (NICs). The document outlines the fundamental concepts of the OSI model and its application in computer networking.

1. Computer network
By
P. GOPINATH,M.C.A.,
ASSISTANT PROFESSOR
DEPARTMENT OF COMPUTER SCIENCE

2. OSI Reference model
 OSI Model stands for Open System interconnection
model.
 It used to data is transferred from one computer to another
computer.
 It basic scenario two computers connected with a LAN
and connectors transfer data using the NIC.
 OSI model was introduced by International Organization
for standardization (ISO) in 1984.

3. There are seven layers in a OSI model