Describe types of networks by geographical coverage and explain network topologies: STAR, BUS, and RING.

Christelle, let's knock this out. Here are the answers to your structural questions: 1) Outline and describe the type of network according to geographical area coverage. There are several types of networks classified by their geographical area coverage: Local Area Network (LAN): Connects devices within a limited geographical area, such as a home, office building, or school campus. LANs are typically characterized by high data transfer rates and are privately owned. Metropolitan Area Network (MAN): Spans a larger geographical area than a LAN, typically covering a city or a large campus. It connects multiple LANs together. Wide Area Network (WAN): Covers a large geographical area, often connecting cities, states, or even countries. The internet is the largest example of a WAN. WANs typically use public telecommunication lines. Personal Area Network (PAN): Connects devices within an individual's personal workspace, usually within a range of a few meters. Examples include Bluetooth connections between a phone and headphones. 2) Explain the term topology. With Well labelled diagrams describe STAR, BUS, and RING topology using only three computers for each diagram. Topology refers to the physical or logical arrangement of nodes (computers, servers, etc.) and connections (cables, wireless links) in a network. It dictates how data flows through the network. Star Topology: Description: In a star topology, all devices are connected to a central hub or switch. Each device has a dedicated point-to-point link to the central hub. Diagram (with 3 computers): Imagine a central point (hub) in the middle. Three lines extend outwards from this central point, each connecting to a separate computer. Each computer would be labeled "Computer 1", "Computer 2", "Computer 3", and the central device "Hub/Switch". Bus Topology: Description: In a bus topology, all devices are connected to a single central cable, called the backbone or bus. Data travels along this backbone, and each device "listens" for data addressed to it. Diagram (with 3 computers): Imagine a single horizontal line (the bus cable). Three computers are connected to this line at different points along its length. The line would be labeled "Bus Cable" and the computers "Computer 1", "Computer 2", "Computer 3". Ring Topology: Description: In a ring topology, each device is connected to exactly two other devices, forming a single continuous pathway for signals. Data travels in one direction around the ring. Diagram (with 3 computers): Imagine three computers arranged in a circle. A line connects Computer 1 to Computer 2, Computer 2 to Computer 3, and Computer 3 back to Computer 1, forming a closed loop. Each computer would be labeled "Computer 1", "Computer 2", "Computer 3". 3) Distinguish between the two types of network architecture. The two main types of network architecture are Client-Server and Peer-to-Peer (P2P). Client-Server Architecture: In this model, dedicated servers provide services (like file storage, printing, or web hosting) to client computers. Clients request services, and servers respond. Servers are typically more powerful and manage resources centrally. Peer-to-Peer (P2P) Architecture: In a P2P network, all connected devices (peers) have equal capabilities and responsibilities. Each peer can act as both a client and a server, sharing resources directly with other peers without a central server. 4) State and explain the components of a communication system. A communication system typically consists of five fundamental components: Sender (Source): The device or entity that originates the message or data to be transmitted. This could be a computer, a phone, or a person. Receiver (Destination): The device or entity that receives the message or data from the sender. This could also be a computer, a phone, or a person. Message: The actual information, data, or signal that is being sent from the sender to the receiver. It can be text, audio, video, or any other form of data. Transmission Medium: The physical path or channel through which the message travels from the sender to the receiver. Examples include copper cables, fiber optic cables, or wireless airwaves. Protocol: A set of rules and standards that govern how data is transmitted and received between devices in a communication system. Protocols ensure that both the sender and receiver understand each other. 5) Differentiate between analog and digital signals using diagrams. Analog Signals: Description: Analog signals are continuous waveforms that vary smoothly over time. They represent data as continuous variations in amplitude, frequency, or phase. They are typically used in natural phenomena like sound and light. Diagram: A diagram would show a smooth, continuous wave, similar to a sine wave, with no abrupt changes. The y-axis would represent amplitude and the x-axis time. Digital Signals: Description: Digital signals are discrete, non-continuous waveforms that represent data as a sequence of distinct values, typically binary (0s and 1s). They are characterized by abrupt changes between a limited number of states. Diagram: A diagram would show a series of square waves or pulses, alternating between two distinct voltage levels (e.g., high for '1' and low for '0'). The y-axis would represent voltage levels and the x-axis time. 6) Give one example of each of the following transmission mode. Simplex: Radio broadcast* (e.g., a radio station transmits, but listeners cannot transmit back). Half duplex: Walkie-talkie communication* (users can transmit and receive, but not simultaneously; one must finish talking before the other can speak). Full duplex: Telephone conversation* (both parties can talk and listen at the same time). Send me the next one 📸