Basic Computer Network Quiz

IP addresses are represented in the dotted decimal notation, which consists of four parts separated by dots. Each part is made up of 8 bits, resulting in a total of 32 bits for the entire address. This allows for a wide range of possible addresses, as each 8-bit field can have a value ranging from 0 to 255. Therefore, the correct answer is 8-bit fields.

Radio waves and microwaves are used in wireless communications. Wireless communication refers to the transmission of information between devices without the need for physical wires or cables. This includes various forms of wireless communication such as Wi-Fi, Bluetooth, cellular networks, and satellite communication. Voice over IP (VoIP) and IP Telephony are examples of communication protocols that can be used over wireless networks, but they are not exclusive to wireless communication. Enterprise communication can also utilize wireless technologies, but it is not specific to radio waves and microwaves.

Fiber optics cables have the ability to transmit data at very high speeds due to their use of light signals. The maximum bandwidth that can be supported by fiber optics cable is 2000 Mbps. This means that the cable can transfer data at a rate of 2000 megabits per second, making it ideal for high-speed internet connections and other applications that require fast and reliable data transmission.

Class A IP addressing would best meet the requirements of connecting more than 1650000 hosts in the network. Class A addresses have a large range of network addresses, allowing for a maximum of 16,777,214 hosts per network. This would provide enough IP addresses to accommodate the large number of hosts in Vodafone Fiji Ltd's network.

Coaxial cables provide effective protection against EMI (Electromagnetic Interference) during data transmissions. EMI is a disturbance caused by external electromagnetic signals that can interfere with the quality of data transmission. Coaxial cables are designed with an inner conductor, insulating layer, metallic shield, and outer insulating layer, which provides excellent shielding against EMI. This shielding helps to minimize the impact of external electromagnetic signals, ensuring a reliable and high-quality data transmission.

MAC and LLC are two sublayers of the Data Link layer. The Data Link layer is responsible for providing error-free transmission of data frames over a physical link. The MAC sublayer handles the addressing and access to the physical media, while the LLC sublayer handles flow control and error checking. Together, they ensure reliable communication between devices connected to the same network.

Single mode is the correct answer because it is the transmission mode that is used for transmitting data over long distances in fiber-optic cables. Single mode fibers have a small core diameter, which allows for a single mode of light to propagate through the fiber. This results in less dispersion and attenuation, making it ideal for long-distance transmission where the signal needs to travel without significant loss or distortion.

ARPA stands for Advanced Research Projects Agency. This agency was created by the United States government in 1958 to develop cutting-edge technology for military purposes. It was responsible for the development of the ARPANET, which eventually evolved into the internet we use today. The correct answer is Advanced Research Projects Agency.

In duplex transmission, both nodes can transmit and receive data simultaneously, allowing for bi-directional communication. However, in half-duplex transmission, only one node can transmit at a time while the other node receives, and vice versa. Therefore, statement A is true as it correctly describes duplex transmission, while statement B is false as it inaccurately describes half-duplex transmission.

The statement "Networks can be divided into four network topologies: mesh, cellular, star and bus" is not true. Network topologies refer to the way in which devices are connected in a network, and there are more than just four topologies. Some other common network topologies include ring, tree, and hybrid.