CSEC Data Communications And Networking: Quiz!

The best description of the transmission directions possible in a network includes simplex, half-duplex, and full duplex. Simplex refers to a one-way communication where data can only be transmitted in one direction. Half-duplex allows for two-way communication, but only one direction at a time. Full duplex enables simultaneous two-way communication, allowing data to be transmitted in both directions at the same time.

The correct answer is "bus, ring, double ring, hexagon". This is because bus and ring are both examples of network topologies, while double ring and hexagon are not commonly recognized network topologies. A bus topology is a linear network where all devices are connected to a single cable, while a ring topology is a circular network where each device is connected to two neighboring devices forming a closed loop. Double ring and hexagon are not standard network topologies and are not commonly used in networking.

A star network topology has a central device, usually a switch or hub, which brings all the signals together. In this topology, all devices are connected directly to the central device, forming a star-like structure. This central device acts as a central point of control and communication for all connected devices, allowing them to communicate with each other through the central hub.

The correct answer is bus. In a bus network topology, all devices are connected to a single backbone cable. The terminators are required at the ends of the lines to prevent signal reflection and ensure that the signal travels in only one direction. Without terminators, the signal would bounce back and forth, causing interference and communication issues.

A network is a collection of interconnected devices, such as computers, servers, and printers, that can communicate with each other and share resources. Networks can be as small as a few devices in a home office or as large as millions of devices across the globe. The internet is an example of a vast network that connects billions of devices worldwide.

A modem is a device that converts digital signals from a computer or other digital device into analog signals that can be transmitted over telephone lines. It also converts analog signals received from the telephone lines back into digital signals that can be understood by the computer or digital device. This allows for the transmission of data over telephone lines, enabling internet connectivity and communication between digital devices.

Extranet, intranet, LAN, and WAN are all types of computer networks. An extranet is a private network that allows access to specific external users, such as suppliers or customers. An intranet is a private network that is only accessible to an organization's internal users. LAN stands for Local Area Network, which is a network that connects devices within a limited area, such as a home or office. WAN stands for Wide Area Network, which is a network that connects devices over a large geographical area, such as multiple offices or cities.

In a bus topology, all devices are connected to a single cable or "bus." This cable acts as the backbone of the network, and all communication between devices travels along this shared medium. Bus topology is simple to implement and requires less cabling than other topologies, but it can be susceptible to network disruptions if the bus cable fails.

All communication systems require a sender to transmit information, a receiver to receive the information, and a communication channel or medium through which the information is transmitted. The terms "communication channel" and "channel" are used interchangeably to refer to the pathway through which the information travels. Similarly, "communication medium" and "transmission medium" are also used interchangeably to describe the means by which the information is transmitted, such as wires, cables, or airwaves.

This cable, known as a fiber optic cable, utilizes light to transmit information instead of relying on magnetic signals. The use of light allows for faster and more efficient data transmission, making it an ideal choice for high-speed internet connections and long-distance communication. The cable is made up of thin strands of glass or plastic, known as fibers, which carry the light signals over long distances. The term "fiber optics" is often used interchangeably with "fiber optic cable" to refer to this technology.