IT 276 Final

Distortion refers to any change in the shape or quality of a signal, noise is unwanted random signals that degrade the quality of the original signal, and interference is any unwanted signal that disrupts the transmission of the original signal.

Fiber optic cable is made of flexible glass and transmits signals using light pulses, making it immune to electromagnetic interference and noise that typically affect copper cables.

Shared access mediums allow multiple devices to share the same communication channel. Examples of protocols used in shared access mediums include CSMA/CD (Carrier Sense Multiple Access with Collision Detection) and CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance).

Wireless networks rely on radio waves to transmit data without the need for physical cables, whereas wired networks use cables to establish connections. Wireless networks are more susceptible to interference and have limited range compared to wired networks.

The three types of multiplexing are Time Division Multiplexing (TDM), Frequency Division Multiplexing (FDM), and Wavelength Division Multiplexing (WDM). TDM divides the transmission channel into time slots, FDM divides it into frequency bands, and WDM separates signals using different wavelengths of light.

Key components of a Wi-Fi network include Access Points (AP), which enable wireless devices to connect to the network; Service Set Identifiers (SSID), which are names assigned to Wi-Fi networks; and Basic Service Set Identifiers (BSSID), which are MAC addresses associated with wireless networks.

The optimal channels for Wi-Fi networks in the 2.4 GHz frequency range are channels 1, 6, and 11. These channels do not overlap, reducing interference between neighboring networks.

The maximum distance for regular Ethernet runs is 100 meters (300 feet), and its common speed is 1 gigabit per second (Gbps).

A switch makes decisions about forwarding data packets based on the destination MAC address contained in each packet. It maintains a MAC address table to associate MAC addresses with specific network ports.

Digital data transmission involves discrete, definable values represented as binary digits (0s and 1s), whereas analog data transmission involves continuous signals with varying amplitude and frequency.

VLANs (Virtual Local Area Networks) allow devices on the same physical switch to be logically grouped into separate LANs (Local Area Networks), enabling better network management, security, and traffic control.

The security standards commonly used for Wi-Fi networks are WPA2 (Wi-Fi Protected Access 2) and WPA3 (Wi-Fi Protected Access 3), which provide encryption and authentication mechanisms to secure wireless communication.

Microwave ovens emit radiation in the 2.4 GHz frequency range, which can interfere with Wi-Fi signals operating in the same frequency band, causing degradation in network performance.

Address Resolution Protocol (ARP) is used to map IP addresses to MAC addresses in a local network. When a device needs to communicate with another device, it sends an ARP request to obtain the MAC address associated with the target IP address.

The Shannon Capacity theorem determines the maximum bitrate achievable for a given communication channel in the presence of noise, distortion, and interference.

Multimode fiber allows multiple light modes to propagate through the fiber core, while single mode fiber supports only one mode of light propagation, resulting in higher bandwidth and longer transmission distances.

AM (Amplitude Modulation) radio stations modulate the amplitude of the carrier wave to transmit audio signals, while FM (Frequency Modulation) radio stations modulate the frequency of the carrier wave.

MIMO (Multiple Input Multiple Output) technology uses multiple antennas to transmit and receive multiple data streams simultaneously, increasing data throughput, range, and reliability in wireless communication.

Switches forward data packets based on MAC addresses within the same network segment, while routers forward packets based on IP addresses between different network segments.

UTP cables are less expensive, easier to install, and more flexible than STP cables, making them a preferred choice for most Ethernet connections.

The 2.4 GHz frequency band provides better coverage and penetration through walls, while the 5 GHz frequency band offers higher data rates and less interference, making it ideal for high-density environments.

Fiber optic cables are made of flexible glass or plastic fibers that transmit data as light pulses. They are immune to electromagnetic interference, have low signal attenuation, and can transmit data over long distances without loss of signal quality.

The formula for calculating electrical power is Power (P) = Voltage (V) × Current (I), where Power is measured in watts, Voltage is measured in volts, and Current is measured in amperes.

Generator backup ensures continuous power supply during prolonged outages, while battery backup provides immediate power during short outages, ensuring uninterrupted operation of servers.

A UPS is used to provide backup power to critical network devices, such as servers and network switches, during power outages, ensuring uninterrupted operation and data integrity.