Networks and Communications Flashcards
What is a modem
A device that sends and receives data over phone lines, cable, or satellite to connect your network to the Internet Service Provider (ISP).
What is a firewall
A system that protects your network by controlling which data can come in or go out, based on security rules.
What is a router
A device that sends data between different networks, like connecting your home network to the internet.
What is a wired data transmission media
Wired data transmission media refers to the physical cables used to connect devices and transmit data in a network.
What are the two types of wired data transmission media
- Twisted pair cables
- Fibre Optic cables
What is a Twisted Pair
Twisted pair cables are made of copper wires twisted together to reduce interference from other wires and outside sources.
What are the uses of a Twisted Pair cable
1.Widely used for telephone lines and local area networks (LANs).
2. Commonly used in networking standards such as Ethernet cables
What are two advantages of the Twisted Pair cable
1.Cost-effective and easy to install.
2.Suitable for short to medium distances (up to 100 meters).
What are two disadvantages of Twisted Pair cables
- Susceptible to electromagnetic interference.
- Has a limited amount of data capacity compared to fibre optic cables
What is a Fibre Optic cable
Fiber optic cables use thin strands of glass or plastic fibers to transmit data as light signals.
Allowing data to travel at very high speeds over long distances.
What is ISP
Stands for Internet Service Provider. A business that provides access to the internet for individuals and businesses
What is Dial up
Dial-up is an older type of internet connection that uses a standard telephone line to connect to the internet. It works by dialing a phone number to reach the internet service provider (ISP)
What are disadvantages of Dial Up
1.Offers much slower speeds compared to modern broadband connections.
- Dial-up ties up the phone line while you’re online, so you can’t use the phone for calls at the same time.
Advantages of Dial Up
Low cost
What is satellite internet
Satellite internet connects you to the internet using satellites in space. It sends data between your satellite dish, a satellite in orbit, and a ground station.
What is an advantages of Satellite Internet
useful for people in remote areas
What is the disadvantages of Satellite Internet
Can be slower and affected by weather.
What is an ADSL
ADSL (Asymmetric Digital Subscriber Line) is a type of internet connection that uses existing telephone lines to provide high-speed internet access
Advantages of ADLS
Widespread Availability: Utilizes existing telephone lines, making it accessible in many areas.
Cost-Effective: Generally cheaper than fiber optic and cable internet options.
Disadvantages of ADSL
Distance Limitation: Speed and performance can degrade the farther you are from the service provider’s central office.
Lower Speeds: Compared to fiber optic and some cable connections, ADSL speeds may be slower, particularly for heavy internet usage.
What are the two types of Fibre Optic
Single-Mode Fiber (SMF): Uses one light path, ideal for long-distance communication with little signal loss.
Multi-Mode Fiber (MMF): Uses multiple light paths, best for shorter distances, up to 500 meters.
What are the two types of Wireless Transmission
Radio Waves: Used for Wi-Fi, Bluetooth, and AM/FM radio. They have long wavelengths, can pass through walls, and are good for communication over short to medium distances.
Microwaves: Used in mobile phones and satellite communication. They have shorter wavelengths and need a direct line of sight between the transmitter and receiver.
What are the two types of Wireless Transmission
Radio Waves: Used for Wi-Fi, Bluetooth, and AM/FM radio. They have long wavelengths, can pass through walls, and are good for communication over short to medium distances.
Microwaves: Used in mobile phones and satellite communication. They have shorter wavelengths and need a direct line of sight between the transmitter and receiver.
What are the disadvantages of Wireless Transmission
○ Interference: Wireless signals can be affected by physical obstacles (like walls) and other electronic devices, leading to potential loss of signal quality.
○ Security: Wireless networks can be more vulnerable to unauthorized access, requiring strong security measures like encryption.
What is communication software
Communication software enables the exchange of information and data between individuals, systems, or devices.
What are types of communication software
Browser and Email
