The receiver acknowledges the receipt of each frame. It understands the concept of a ‘data frame’ – a stream of bits of a fixed length, and transmits these frames sequentially. Its main job is to transform a raw transmission channel into a line that appears free of undetected transmission errors. It only cares about the 0s and 1s contained in the bit-stream but does not care about the content of the message.ĭata Layer: It’s the next layer up. This layer does not understand what the bits mean. Physical Layer: This is the lowest layer and is responsible for sending/receiving data bits across the wire, and performing the necessary error checking to ensure that the signal is correctly sent and/or received. Each layer may or may not exist in isolation on a real machine, but the logical boundaries make it easier to understand its inner workings. We can imagine each machine to consist of the following software layers for the purpose of understanding what a computer network entails. The Layered Architecture of Computer Networks If you remove the distributed system from the equation, all you are left with are a bunch of machines that are connected to each other, via some communication channel i.e., radio waves, Bluetooth, Wi-Fi, coaxial cable, Ethernet etc., that we can refer to as a computer network. The latter is built on top of the former. The age of the computer networks had dawned upon us.Ĭomputer networks come in various shapes and sizes and are often confused with the notion of a distributed system. But as computers evolved and became cheaper, the computing industry saw a huge growth of interconnected computers – the machines needed to talk to each other, irrespective of their geographic boundaries. In the early days of computing it was common to find a single machine that was time-shared among multiple users. Our experts are highly experienced in analyzing computer networks. Command line utilities (traceroute, ipconfig, etc.).
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |