Blog

Introduction It is the top and most advanced layer of the OSI model.  This is the 7th layer of the OSI model. This is the higher layer of the OSI model.  Features This layer defines the language and syntax that programs use to communicate with other programs. This layer represents the purpose of communicating in the first place. For example, a program in a client workstation uses commands to request data from a program in the …

Introduction This is the 6th layer of the OSI model. This is the Upper layer of the OSI model. This layer lies in between the Session layer and the Application layer. Features In a computer network, different computers have different codes for representing character strings (e.g., ASCII, EBCDIC, Unicode, etc), integers (e.g., one’s complement and two’s complement), and so on. In order to make it possible for computers with different representations to communicate, the data …

Introduction The session layer is the 5th layer of the OSI model. This layer lies in between the Transport layer and the Presentation layer. Features The session layer controls and coordinates the dialogues or data-exchange process between senders’ and receivers’ computers during communication in an orderly manner. This layer is mostly implemented in application environments that use remote procedure calls(RPC). Functions Session Creation: The Session layer decides when to turn communication on and off between …

Introduction The transport layer is the 4th layer of the OSI model. This layer lies in between the Network layer and the Session layer. Features This layer acts as an interface between the bottom and top three layers. The lower data link layer (layer 2) is only responsible for delivering data packets from one node to another in the LAN area whereas in WAN it is done by the transport layer. Thus, if a data …

Introduction of OSI Network Layer The network layer is the 3rd layer of the OSI model from the bottom side(Physical Layer). This layer lies in between the Data link layer and the Transport layer. Characteristics of OSI Network Layer The unit of data at the network layer is popularly called Data Packet/Packet. The device found at the Network layer is a Router. There are so many mechanisms have been proposed to solve the different types of …

Introduction This is the 2nd layer of the hierarchical OSI model. This layer lies between the physical layer and the network layer. This is considered the Lower layer of the OSI model. Features The Data Link Layer performs its functions mainly in the LAN area. The main network device found at the data link layer is  Switch & Bridge. The Data Link layer, together with the physical layer, provides a data link connection for reliable …

Introduction The physical layer is the lowest layer/Layer 1 of the OSI model. Features The data units in this layer are called Signals(analog or digital) of Bits. The main network devices used/found in the Physical layer are a Repeater and a Hub, i.e., this layer does not work with devices having any software, rather it is pure hardware. This layer studies about transmitting medium, i.e., wired(cables and connectors) or wireless. This layer also works on …