Definitions

OSI physical- The Physical layer is responsible for the ultimate transmission of data over network communications media. It operates with data in the form of bits that are sent from the Physical layer of the sending (source) device and received at the Physical layer of the destination device

Data link-is an information storage architect. We help organizations analyze, design, implement, manage and support customized data storage solutions.

Network-The Network Layer is responsible for end-to-end packet delivery including routing through intermediate hosts
The network layer is a complex layer that provides connectivity and path selection between two end systems that may be located on geographically diverse networks.

Transport-movement of information from one place to another

Application Layers-a term used in categorizing protocols and methods in architectural models of computer networking. Both the OSI model and the Internet Protocol Suite (TCP/IP) contain an application layer.