DATA COMMUNICATION SYSTEM
7. Chapter 07.Understand the network topologies.
7.1. Define network topology.
A network topology is the pattern in which nodes (i.e., computers, printers, routers or other devices) are connected to a local area network (LAN) or other network via links (e.g., twisted pair copper wire cable or optical fiber cable). There are four principal topologies used in LANs: bus, tree, ring, and star .
7.2 Mention the difference between physical and logical topology.
Logical topology is the arrangement of devices on a computer network and how they communicate with one another.[1] Logical topologies describe how signals act on the network.[2]
In contrast, a physical topology defines how nodes in a network are physically linked and includes aspects such as geographic location of nodes and physical distances between nodes. The logical topology defines how nodes in a network communicate across its physical topology. The logical topology can be considered isomorphic to the physical topology, as vice versa.
Early twisted pair Ethernet with a single hub is a logical bus topology with a physical star topology. While token ring is a logical ring topology with a physical star topology.
(IN bangla
নেটওয়ার্ক টপোলজি (ইংরেজি: Network Topology) হলো এটি নেটওয়ার্কের ফিজিক্যাল ডিভাইস বা কম্পোনেন্ট। যেমন- ক্যাবল, পিসি, রাউটার ইত্যাদি যেভাবে নেটওয়ার্কে পরস্পরের সাথে সংযুক্ত থাকে তাকে বলা হয় টপোলজি। নেটওয়ার্ক টপোলজি মূলত নেটওয়ার্কের ফিজিক্যাল লেআউট (Layout) বর্ণনা করে থাকে। )