Basics Of Networking Quiz 1

Radio waves and microwaves are used in wireless communications. Wireless communication refers to the transmission of information without the use of physical connections or wires. Radio waves and microwaves are electromagnetic waves that can be used to transmit signals over long distances. They are commonly used in various wireless communication systems such as mobile phones, Wi-Fi networks, Bluetooth devices, and satellite communications. Therefore, the correct answer is "Wireless".

IP addresses are represented in the dotted decimal notation, where each address is divided into four 8-bit fields separated by dots. This notation allows for easy identification and organization of IP addresses, as each field represents a specific portion of the address.

MAC (Media Access Control) and LLC (Logical Link Control) are two sublayers of the Data Link layer in the OSI model. The Data Link layer is responsible for providing reliable and error-free communication between two directly connected devices. The MAC sublayer handles the addressing and access to the physical media, while the LLC sublayer manages the flow control and error detection of the data being transmitted. Therefore, the correct answer is the Data Link layer.

Class A IP addressing would best meet the requirements of Salen Chetty for designing the network setup for Vodafone Fiji Ltd. Class A provides a large range of IP addresses, allowing for more than 16 million hosts to be connected to the network. As there are more than 1,650,000 hosts in this case, Class A would be the most suitable choice. Class B and Class C have smaller ranges, while Class D is reserved for multicast addresses.

Coaxial cables use copper wires, which are good conductors of electricity. This is because copper has low resistance to the flow of electric current, allowing for efficient transmission of signals through the cable. The use of copper wires in coaxial cables helps to minimize signal loss and maintain high-quality transmission.

Duplex transmission allows communication in both directions. In full-duplex, both nodes can transmit and receive simultaneously (like a telephone call). In half-duplex, nodes can both send and receive, but only one at a time (like a walkie-talkie). Statement A correctly describes duplex as allowing two-way communication. However, Statement B incorrectly claims that both nodes can transmit and receive at the same time in half-duplex, which is false—this simultaneous communication only applies to full-duplex, not half-duplex.

ARPA stands for Advanced Research Projects Agency. This agency was established in 1958 by the United States Department of Defense. Its main purpose was to develop new technologies and conduct research in various fields, including science, technology, and engineering. ARPA played a crucial role in the development of the internet, as it funded the creation of ARPANET, the precursor to the modern internet. The agency's name was later changed to DARPA (Defense Advanced Research Projects Agency) in 1972.

Single-mode is the correct answer because it is the transmission mode used for transmitting data over long distances in fiber-optic cables. Single-mode cables have a smaller core diameter, allowing for a single beam of light to travel straight down the center of the cable without bouncing off the walls. This minimizes signal loss and allows for longer transmission distances. In contrast, multimode cables have a larger core diameter, which allows multiple beams of light to travel through the cable, but this can cause signal distortion and limits the distance over which data can be transmitted.

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