Electromagnetic Spectrum and Fibre-Optics Quiz

Communication technologies and data transfer.

At the low frequency end of the electromagnetic spectrum.

Ticketing and cashless payments.

<p>From about 1 millimeter to over 100 kilometers.</p> Signup and view all the answers

<p>The radio-frequency spectrum is a small part of the electromagnetic spectrum.</p> Signup and view all the answers

<p>It uses light pulses.</p> Signup and view all the answers

<p>They allow for high-speed data transmission and secure long-distance communication.</p> Signup and view all the answers

<p>It consists of a glass core surrounded by cladding and may have a protective outer sheath and Kevlar reinforcement.</p> Signup and view all the answers

<p>Single-mode transmits a single ray of light for long distances, while multimode transmits multiple rays for shorter distances.</p> Signup and view all the answers

<p>The maximum transfer rate is up to 10 Gbps.</p> Signup and view all the answers

<p>The maximum length for UTP cables is 100 meters. Exceeding this length can lead to signal attenuation and degradation of connection quality.</p> Signup and view all the answers

<p>Two advantages of UTP cables are their low cost and ease of installation. These factors contribute to their popularity in networking.</p> Signup and view all the answers

<p>UTP-Cat 5e supports data rates up to 1000Mbps, while UTP-Cat 6 also supports data rates up to 1000Mbps. Both categories are suitable for Gigabit Ethernet.</p> Signup and view all the answers

<p>Crosstalk is the interference of signals from one line affecting another. It can be reduced by increasing the number of twists per meter in the cable.</p> Signup and view all the answers

<p>One weakness of copper cables is eavesdropping, where signals can be intercepted by outsiders. This raises security concerns in networks using copper cabling.</p> Signup and view all the answers

<p>To share hardware and software resources among connected devices.</p> Signup and view all the answers

<p>Unshielded Twisted-Pair (UTP) and Shielded Twisted-Pair (STP).</p> Signup and view all the answers

<p>Nodes are devices that can send or receive data on the network.</p> Signup and view all the answers

<p>NICs connect network media like cables to devices.</p> Signup and view all the answers

<p>Bounded media, like cables, keep signals within the cable, while wireless connectivity transmits signals through the air.</p> Signup and view all the answers

<p>Signals remain contained within the cable.</p> Signup and view all the answers

<p>They consist of two insulated copper wires twisted around each other.</p> Signup and view all the answers

<p>Switches are a common example of connecting devices.</p> Signup and view all the answers

<p>Fibre-optic cables are more expensive than UPT cables.</p> Signup and view all the answers

<p>Expertise in properly installing and connecting the cables to devices is required.</p> Signup and view all the answers

<p>Infrared and Bluetooth are examples of unbounded connection media.</p> Signup and view all the answers

<p>They enable data transfer over long distances where cables are impractical.</p> Signup and view all the answers

<p>Bluetooth operates within the 2400–2480 MHz frequency range.</p> Signup and view all the answers

<p>BLE is designed for applications needing lower power consumption.</p> Signup and view all the answers

<p>NFC provides a wireless connection for two-way communication between devices.</p> Signup and view all the answers

<p>PANs are used for short-distance data transmission between personal devices.</p> Signup and view all the answers

<p>It requires less cable and does not need a switch, reducing costs.</p> Signup and view all the answers

<p>Point-to-point communication connects two specific nodes, while broadcast communication sends signals to all devices within the network.</p> Signup and view all the answers

<p>A fault in the main cable can shut down the whole network.</p> Signup and view all the answers

<p>Fiber optic cables offer higher data transmission speeds and greater resistance to electromagnetic interference.</p> Signup and view all the answers

<p>Unbounded connection media refer to transmission methods that do not use a physical medium, such as wireless communication.</p> Signup and view all the answers

<p>All nodes are connected in a closed loop, with data traveling in one direction.</p> Signup and view all the answers

<p>One advantage of Bluetooth technology is its ability to enable seamless wireless communication over short distances.</p> Signup and view all the answers

<p>It has very little signal degradation due to each node boosting the signal.</p> Signup and view all the answers

<p>Modern ring networks use two rings for signals to travel in different directions.</p> Signup and view all the answers

<p>The frequency of the wave determines the distance a radio wave signal can travel, with higher frequencies resulting in shorter distances.</p> Signup and view all the answers

<p>In a star topology, each device connects to a central device, usually a switch.</p> Signup and view all the answers

<p>An advantage is easy setup and maintenance; a disadvantage is the high cabling cost.</p> Signup and view all the answers

<p>In a bus topology, all nodes connect to a single cable with terminators at each end.</p> Signup and view all the answers

<p>If the switch fails, the entire network goes down.</p> Signup and view all the answers

<p>Unshielded Twisted Pair (UTP) is commonly used in star topology.</p> Signup and view all the answers

<p>One malfunctioning workstation can disrupt the entire network.</p> Signup and view all the answers

<p>It allows for easier error detection and troubleshooting.</p> Signup and view all the answers

<p>It enables nodes to communicate through a common protocol.</p> Signup and view all the answers

<p>An IP address allows a device to access the Internet.</p> Signup and view all the answers

<p>It can be complex to design and is often costly.</p> Signup and view all the answers

<p>A MAC address is a unique hardware identification number assigned to each device on a network.</p> Signup and view all the answers

<p>A MAC address is formatted as six two-digit hexadecimal numbers separated by colons (e.g., 00:00:83:bl:c0:8e).</p> Signup and view all the answers

<p>IPv4 is a network protocol that uses 32 binary bits to create a unique address.</p> Signup and view all the answers

<p>An IPv6 address uses 128 binary bits, compared to 32 bits used by IPv4.</p> Signup and view all the answers

<p>Internet Protocols specify how data is exchanged between devices and over networks.</p> Signup and view all the answers

<p>ARP maps IP addresses to MAC addresses and stores these mappings in the ARP table.</p> Signup and view all the answers

<p>A computer consults the ARP table to find the corresponding MAC address.</p> Signup and view all the answers

<p>The ARP table stores mappings of IP addresses to MAC addresses for all devices on the network.</p> Signup and view all the answers