The presentation layer structures data that is passed down from the application layer into a format suitable for network transmission. • 5. The presentation layer is responsible for interoperability between encoding methods as different computers use different encoding methods. This layer formats and encrypts data to be sent across a network. This ensures the security of the data as it travels down the protocol stack. It translates data between the formats the network requires and the format the computer. Main functions of this layers includes translation, encryption and compression of data. •6. The presentation layer is responsible for the following: Data encryption/decryption ; Character/string conversion; Data compression ; Graphic handling; The presentation layer mainly translates data between the application layer and the network format. Encryption: It carries out encryption at the transmitter and decryption at the receiver. So in reality TLS is mostly session-layer as it provides point-to-point session security for the transport (TCP). Layer 6 is the presentation layer. The presentation layer prepares data for the application layer. Basically User interacts with Application layer, which sends the data down to Presentation layer. At-rest encryption (say in a database field or email message) might be a candidate for the presentation layer, but I would suggest that it's closer to a form of OS or application security. The presentation layer takes any data transmitted by the application layer and prepares it for transmission over the session layer. It defines how two devices should encode, encrypt, and compress data so it is received correctly on the other end. This layer is responsible for data formatting, such as character encoding and conversions, and data encryption. It responds to requests from the presentation layer and issues requests to the transport layer. The presentation layer may represent (encode) the data in various ways (e.g., data compression, or encryption), but the receiving peer will convert the encoding back into its original meaning. Presentation Layer • This is the layer in which the operating system operates with the data. For example, one of the most popular encryption schemes that is usually associated with the presentation layer is the Secure Sockets Layer (SSL) protocol. Data can be communicated in different formats via different sources. Not all encryption is done at layer 6, however; some encryption is often done at lower layers in the protocol stack, in technologies such as IPSec. In this tip, learn why encryption is so important and how certain hacker attacks can still circumvent SSL or TLS and threaten your networks. For example, the Secure Sockets Layer (SSL) protocol. Presentation Layer. SSL or TLS encryption takes place at the presentation layer, Layer 6 of the OSI model. Actually, encryption (and decryption) is performed at the presentation layer also. Presentation Layer The presentation layer is concerned with preserving the meaning of information sent across a network. The Presentation Layer makes sure that computers can interoperate and that data is understandable by the receiver. OSI Layer 6. However, not all encryption is done at layer 6, some encryption is often done at lower layers in the protocol stack. Presentation Layer is the Layer 6 of the seven-layer Open Systems Interconnection (OSI) reference model. This layer provides independence from data representation (e.g., encryption) by translating between application and network formats. Encryption and decryption are performed on the Presentation Layer of the OSI Model along with Translation and Compression. The presentation layer transforms data into the form that the application accepts.

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