Data representation including code translations, compressions, and encryptions is performed by what layer of the OSI model?

Layer 2 is the Data Link Layer, responsible for MAC addressing, frame creation, and local error detection on a network segment - not data format translation or encryption.

Layer 3 is the Network Layer, responsible for logical IP addressing and routing packets between networks - not compression or code translation.

Layer 4 is the Transport Layer, responsible for end-to-end segmentation, flow control, and reliability via protocols such as TCP and UDP - not data representation.

Layer 5 is the Session Layer, responsible for establishing, maintaining, and terminating communication sessions between applications - not encryption or format conversion.

The Presentation Layer (Layer 6) is responsible for translating data between the formats used by the application and the network, including character code translation (e.g., ASCII to EBCDIC), data compression to reduce transmission size, and encryption/decryption to secure data. It ensures that data produced by one system's Application Layer can be correctly interpreted by another, regardless of internal data representation differences.