Abstract-Paper concentrates on surveying a key region of information systems administration hypothesis -The Open Systems Interconnect (OSI) 7 Layer Model. This survey exhibits the utilization of the prototype ideas into the setting of data safety. This survey shows the point of view that normal data security issues outline to the sensible builds displayed in the OSI 7 Layer Network Model. A couple layers have more impact than others while securing information. Jointly, they can be utilized to fabricate a complete arrangement. Using the OSI Model's 7 layers, this survey paper will exhibit an intelligent, complete and achievable way to deal with securing an association's data assets. In this paper, creator gives a short outline of Symmetric key block cipher for various calculations exhibited in this field as per characterized it in cryptography where we ordered into classes. To start with, Mode of operation which is routes connected block cipher to encode bigger plaintext. Second, iterated item cipher which additionally ordered it into Feistel Network, substitution-stage organizes and Unbalanced Feistel Network. Keyword -OSI (Open system Interconnection), SSL (Secure Sockets Layer), DES (Data Encryption Standards), AES (Advanced Encryption Standards), FEAL (Fast data encipherment algorithm), CLEFIAI. INTRODUCTION OSI Network Layer IntroductionNetworking is a prime sympathy toward data security.[1] The pervasive way of system availability may give us a chance to get to the world from our PC; however, it additionally gives that same world pick up a chance to access back to us in ways we may not pine for. Despite how well we secure our own particular hosts, we are still frail if the parts of the establishment between our far away objectives and ourselves capitulate to ponder mishandle or unwitting episode. Information security and data systems administration are indistinguishably associated subjects. Today's framework configuration must pick the alternative to be security-discerning, and the security construct must pick the choice to grasp the framework he is endowed to secure. A ton of formalized audit has been focused on the science and arrangement of arranging and caring for frameworks. One formal structure that framework engineers discuss and apply as frequently as conceivable is the OSI Seven Layer Model for Networking, made by the ISO to characterize an institutionalized strategy for planning systems and the capacities that bolster them. This prototype portrays 7 layers of cooperation for a data framework conveying over a system, showing a heap of layers speaking to significant capacity ranges that are for the most part required or helpful for information correspondence between hubs in a circulated situation. Beginning from an abnormal state application viewpoint, information is sent down the stack layer by layer, every layer including data around the initially displayed information until that unique information in addition to its layers of included substance are spoken to at the bottommost layer as a optical f...