Q.Jonathan and Jonathan Training Institute is planning to set up its centre in Amritsar with four specialised blocks for Medicine, Management, Law courses alongwith an Admission block in separate buildings. The physical distances between these blocks and the number of computers to be installed in these blocks are given below. You as a network expert have to answer the queries as raised by their board of directors as given in

Network Definition: A First Look

Think about the last time you called a friend, sent a WhatsApp message, or even just walked into a crowded room. In each case, you were part of a network — a structure of connections. The phone call connects two people; the WhatsApp group connects many; the room connects everyone in it through sight and sound. A network is simply any collection of nodes (the things being connected) and the links (the connections between them).

In everyday life, you already know dozens of networks. Your family is a network of people connected by blood or marriage. Your school is a network of students, teachers, and staff connected by classes and activities. The roads you travel form a network of intersections and highways. Even your own body has a network of blood vessels and nerves. The idea is so natural that you have been using it your whole life without giving it a name.

The Precise Meaning

Formally, a network is defined by two things:

• Nodes (also called vertices): the individual units or points in the system. In a friendship network, each person is a node. In a transport network, each city or bus stop is a node.
• Links (also called edges or connections): the relationships or pathways that join nodes together. A link exists between two nodes if they are directly connected — two friends who know each other, two cities with a direct flight, two computers that can exchange data.

The key insight is that a network is not just a random collection of connections. It has a structure — a pattern of who is connected to whom — and that structure determines how the network behaves. A tightly-knit group of friends behaves differently from a loose chain of acquaintances, even if both have the same number of people.

Why It Matters

Networks are everywhere, and understanding them changes how you see the world. Consider a few examples:

• Social networks (Facebook, Instagram, LinkedIn) are built on the idea that people are nodes and "friendship" or "follow" is a link. The structure of these networks determines how information spreads, how trends go viral, and how influence works.
• Supply chains are networks of companies, factories, warehouses, and stores connected by the flow of goods. A disruption at one node — a factory fire, a port strike — can ripple through the entire network.
• Communication networks (the internet, telephone systems) are networks of devices and transmission lines. The design of these networks determines whether your call drops or your video streams smoothly. …