OSI Model questions with answers 2023

OSI Model questions with answers 2023OSI Model model for understanding and developing computer-to-computer communication; divides networking functions among 7 layers Application, Presentation, Session, Transport, Network, Data Link, Physical TCP/IP Transmission Control Protocol/Internet Protocol. Protocol that connects computers to the Internet. Tells computers how to exchange information over the Internet. Application Layer Layer 7 of the OSI model. The network layer that houses the applications that allow users to access the network. It contains five categories of services, File services, e-mail services , network printing services, Application services and database services. Presentation Layer The sixth layer of the OSI model. Protocols in the Presentation layer translate between the application and the network. Here, data are formatted in a schema that the network can understand, with the format varying according to the type of network used. The presentation layer also manages data encryption and decryption, such as the scrambling of system passwords. Session Layer The fifth layer in the OSI model. The Session layer establishes and maintains communication between two nodes on the network. It can be considered the "traffic cop" for network communications. Transport Layer 4th layer; protocols ensure that data are transferred from point A to point B reliably and without errors; services include flow control, acknowledgment, error correction, segmentation, reassembly, and sequencing Network Layer The third layer of the OSI model. Protocols in the Network layer translate network addresses into their physical counterparts and decide how to route data from the sender to the receiver. DataLink Layer Gives unique identities to senders and receivers. Organizes data packets into frames for transmission Layer 2 Physical Layer The lowest, or first, layer of the OSI model. Protocols in the physical layer generate and detect signals so as to transmit and receive data over a network medium. These protocols also set the data transmission rate and monitor data error rates, but do not provide error correction. Encapsulation Encapsulation is the process of transferring packets of data which use different communications protocols inside packets which use another protocol.