Using Graphs Diaz Family Budget NATURE OF GRAPHS

Using Graphs

Diaz Family Budget

NATURE OF GRAPHS Graphs are used synonymously with charts. Charts are graphic accounts of any given information…They make large amounts of data more explicable to a reader or student. Different kinds of charts: Pie Graph Bar Graph Line Graph

Pie Graph A pie graph can best describe information in percentages, fractions, or as a part of a whole.

Bar Graph To describe information in magnitudes and frequencies, it is best to use a bar graph.

Line Graph Showing and comparing information in progress is best achieved by line graph.

GRAPH THEORY In Math, graphs take a more fundamental meaning. Graphs are made up of dots connected by lines. The dots are called vertices or nodes. The lines are called edges or arcs.

Graphs are remarkable in their simplicity. A single dot is also a graph.

Or can be overwhelming in their complexity

GRAPHS IN ICT Graphs lie at the foundation of ICT. The power of ICT rests on its capacity to integrate the many sources of knowledge, and to make this integrated body of data accessible to people. Large-scale networks, Internet technologies, and network communications schemes apply the principles of graphs.

World Wide Web The World Wide Web is a directed graph. Directed graphs are graphs whose edges are oriented in either or both ways. This is why when you surf the Web, you can go forward or backward as you please. In the graph that represents the Web, the pages or websites are the vertices and the links between them are the edges. These edges are called hypertext links. According to experts, the diameter of the WWW is 19. Diameter refers to the least number of edges or links that you have to pass through to get from any one vertex to another.

Networking The idea of the Internet began after engineers saw that it was possible to connect two or more computer systems to create network. By using graphs, engineers devised ways to direct the traffic. It was made to pass through the shortest route, transverse edges or vertex exactly once, begin and end on the same node…

Topology Computer networks can be classified according to their scope. Local Area Networks (LAN ) – consist of systems which are close to one another, like those in the same building. Wide Area Network (WAN) – farther apart; usually connected by telephone lines. Campus Area Network (CAN) – commonly used by schools and military bases. Metropolitan Area Network (MAN) – used by bigger region like a town or a city.

Computer systems can be interconnected in certain geometric arrangements or topologies. Topology refers to the shape or layout of a network. The topology determines how the vertices are connected to one another. The most common topologies of networks are known as the star, bus, ring, mesh, and tree.

Star Every computer is connected to a central hub.

Bus Every computer is connected to a central cable called bus or backbone.

Ring Every computer is connected to two others, the ones on either side of it.

Mesh Every computer is connected to every other computer in the network.

Tree Every group of star networks is connected to a central backbone.