Introduction to Networking Essay Example | Topics and Well Written Essays - 750 words

Introduction to Networking - Essay Example This layer is used for direct control of data with the hardware in place. Data transmitted in this layer is in form of bits. Data exchanged at this level is in form of the frames and it prepares the data to be further processed to the network layer. The physical addresses are assigned at this level, further tasks performed by data link layer include encryption and error correction. By this stage, the data is transmitted into packets and it ensures smooth packet transmission between the two ends. Unlike data link layer, logical addresses are assigned at this layer. It also sets rules for the routing path as to which one should be chosen and followed for the transmission of traffic. Transport Layer: This layer plays the role of intermediate layer between the upper layers and the lower layers. It is largely concerned with the delivery of data sent to the other end. Transport layer are further segregated into connection oriented and connectionless. Other features of this layer include segmentation, window size control and flow control in form of congestion prevention. Session Layer: The session layer is responsible for number of operations, which include the connection establishment, its termination, and its maintenance and recovery. The type of transmission performed under this layer includes full duplex transmission, half duplex transmission and simplex transmission. Presentation Layer: this layer is responsible for encryption of data, its translation along with the syntax and format of data sent from the sending node. IT further performs the task of data compression in case of IPSec. Application layer: This layer serves as an interface of communication between the users and the devices along with the management. Examples of this layer include web browser, telnet, email client and a file sharing protocol F.T.P (Forouzan, 2005). Layered network approach is adopted across the world by all major network service providers, there are