Networking Tutorials

MCQs on OSI Model Questions :-   (Q1). OSI Model consists of _ _ _ _ _ layers. seven two five four (Q2). The physical layer is concerned with the transmission of _ _ _ _ _ over the physical medium. Programs Protocols Bits Dialogs (Q3). The main responsibility of the _ _ _ _ _ layer is to deliver packets from source to destination. Network Application Transport Physical (Q4). Segmentation and reassembly are functions of the _ _ _ _ _ layer. Session Transport Presentation Application (Q5). Trailers to the data are added only at _ _ _ _ _ layer of the OSI model. Presentation Physical Network Data link (Q6). Frames are prepared by _ _ _ _ _ layer. Physical Data link Network Transport Answers :- I will not tell/show the answer's of the above Questions now. Rather I asks you all to find the answers. I will reveal answers when there will be more than 10 Comments to show the answers of above Questions. -----

Open System Interconnection  (OSI) Model - 4 Summary on what we have studied in last tutorial  :- Session layer establishes, manages, synchronizes and terminates connection between the computers. It also sets up, co-ordinates and terminates interactions and dialogues between communicating devices. The session layer is responsible for setting up sessions between communicating devices. It allows two devices to enter into dialog (communication process). At the session layer, checkpoints (synchronization bits) are added into a stream of data to synchronize the sessions. Presentation layer deals with syntax and semantics of the data exchanged between two devices. It transforms the data in the format that will be accepted by the application layer.   Presentation layer receives data from application layer. It adds header to the data and passes data to the session layer. The presentation layer also adds security to data by encrypting it. Encrypting is a process

Open System Interconnection  (OSI) Model - 3 Summary on What we have studied in last tutorial  :- The data unit at Network layer is known as packet.  Network layer receives data from transport layer. It adds header to the data and passes data to the data link layer. The data link layer provides physical addressing which is useful for a local network. Routing is a process wherein a proper path is defined for the packets to reach destination. Internetworking means connecting two or more computer networks together. The data unit at Transport layer is called Segment.   Transport layer receives data from the session layer. It divides the data into segment with each segment having its own header and passes these segments to the network layer.   (1.5)  Session Layer  :-        This is fifth layer of OSI Model. This layer establishes, manages, synchronizes and terminates connection between the computers. It also sets up, co-ordinates and terminates in

Open System Interconnection  (OSI) Model - 2 Summary on what we have studied on last tutorial  :- Open System Interconnection (OSI) Model was developed by the International Standards Organization (ISO) describes the flow of information from one computer to another.   All the layers of the OSI reference model use different protocols.  Physical layer is the first or the bottom most layer of the OSI model. This layer is used to establish or terminate a connection to a communication medium. It also defines the electrical and mechanical specifications like cables, connectors and signalling options of the medium. Data Link Layer is second layer of the OSI model. It handles data transfer between network and the physical layers.  Data a link layer receives the Data from the network layer.  It adds Header and Trailer of the data and passes data to the physical layer. (1.3)  Network Layer  :-       This is third layer of the OSI Model. The data unit at this la

Open system Interconnection  (OSI) Model - 1 Open System Interconnection (OSI) Model  :-            Open System Interconnection (OSI) Model was developed by the International Standards Organization (ISO) describes the flow of information from one computer to another. OSI model is also called ISO OSI Reference Model. It is conceptual model that has seven layers. Physical, Data link, Network, Transport, Session, Presentation and Application are the seven layers of OSI model. Each layer performs distinct functions on the data in accordance with the precious layer functions. The application, presentation and session layers are called as Upper layers.  7 layers of OSI model           All the layers of the OSI reference model use different protocols. Protocol defines the procedure that is to be followed during data transmission. It is the set of specified rules and standards used to transmit data from one device to another. (1.1)  Physical layer  :-