theory chp3 Flashcards
(19 cards)
What does connectivity refer to?
Methods devices use to connect and form networks
Includes Bluetooth, Wi-Fi, and cellular data
What are common devices used to connect to the internet?
Mobile phones, tablets, PCs, smart appliances
Examples include washing machines
What is the primary method of wireless data transmission?
Utilizes radio waves
Includes Wi-Fi, Bluetooth, and cellular data
What is the range and speed of 4G cellular data?
Speeds of 8-10 Mbps, up to 16 km range
4G is a widely used cellular technology
What is the range and speed of 5G cellular data?
Speeds around 100 Mbps, range of 500 meters
5G offers faster speeds compared to 4G
What is an IP address?
Unique numeric identifiers assigned to devices on a network
Example format: 192.168.1.1
What is the function of DNS?
Translates URLs into IP addresses
Acts like a ‘phonebook’ for the internet
What does URL stand for?
Uniform Resource Locator
Easy-to-remember address for websites
What are key factors to consider in wireless transmission?
Bandwidth, transmission distance, security, interference
These factors affect the effectiveness of wireless connections
Fill in the blank: The fastest network speed before 3G was ______ Kbps.
114
It took over five days to download an HD movie at this speed
Who invented the World Wide Web and in what year?
Tim Berners-Lee in 1989
The invention aimed to facilitate information sharing between universities
What is bandwidth?
Data transfer rate
It indicates how much data can be transmitted in a given time
What is encryption?
Secures data by scrambling it
This is important for protecting sensitive information
List three methods of connectivity.
- Bluetooth
- Wi-Fi
- Cellular data
These methods allow devices to connect to the internet
What is the effective indoor range of Bluetooth?
Around 40 meters
Bluetooth is designed for short-range communication
What is the effective indoor range of Wi-Fi?
Works indoors within 50 meters
Wi-Fi can be affected by interference
What activity is suggested to understand internet connectivity?
Write down devices used to connect to the internet in the past week
Categorize by type of connection (wired or wireless)
True or False: DNS is essential for devices to communicate using URLs.
True
DNS converts human-readable addresses into machine-readable IP addresses
What is the role of bandwidth in wireless transmission?
Amount of data transmitted per second
Higher bandwidth allows for faster data transfer
