2.2 Communications.internet Flashcards
What is the internet?
A massive network of networks made up of computers and electronic devices, using TCP/IP communication protocols.
What is the World Wide Web (WWW)?
A collection of multimedia web pages stored on websites, accessible via the internet.
What is HyperText Mark-up Language (HTML)?
A language used to design web pages and write HTTP(S) protocols.
What is a Uniform Resource Locator (URL)?
A URL specifies the location of a web page
What does a web browser do?
It connects to DNS to locate IP addresses and interprets web pages for viewing documents and multimedia.
What is an Internet Service Provider (ISP)?
A company that provides internet access, often charging a monthly fee for their service.
What is the Public Switched Telephone Network (PSTN)?
A network used by traditional telephones for calls and fax transmissions.
What is Voice over Internet Protocol (VoIP)?
A protocol that converts voice and webcam images into digital packets for transmission over the internet.
What is an Internet Protocol (IP)?
A protocol using IPv4 or IPv6 formats to assign addresses to devices connected to the internet.
What is IPv4?
An IP address format using 32 bits (e.g., 200.21.100.6).
What is Classless Inter-Domain Routing (CIDR)?
A system that increases IPv4 flexibility by adding a suffix to the IP address (e.g., 200.21.100.6/18).
What is IPv6?
A newer IP address format using 128 bits (e.g., A8F0:7FFF:F0F1:F000:3DD0:256A:22FF:AA00).
What is zero compression in IPv6?
A method of shortening IPv6 addresses by replacing groups of zeroes with “::”, which can only be used once per address.
What is sub-netting?
The practice of dividing a network into two or more sub-networks.
What is the difference between private and public IP addresses?
Private IP address: Reserved for internal network use behind a router.
Public IP address: Allocated by an ISP to identify a device’s location on the internet.
What is the Domain Name Service (DNS)?
A system that assigns domain names to internet hosts and finds the IP address associated with a domain name.
What is JavaScript?
An object-oriented or scripting programming language used mainly to enhance HTML web pages.
What is PHP?
A Hypertext Preprocessor; an HTML-embedded scripting language for writing web pages.
What is the internet?
A massive network of networks made up of computers and electronic devices, using transmission control protocol (TCP) and internet protocol (IP).
What does “internet” stand for?
Interconnected network.
What is the World Wide Web (WWW)?
A collection of multimedia web pages and documents stored on websites, accessed via the internet using web browsers.
How does the World Wide Web (WWW) use the internet?
The WWW uses the internet to access information from servers and other computers.
What protocols and technologies are associated with the World Wide Web?
- HTTP(S) protocols: Written using HTML.
- URLs: Specify the location of web pages.
What is required to connect to the internet?
- A device (e.g., computer, tablet, mobile phone).
- A telephone line or mobile phone network connection.
- A wired or wireless router (or router with a modem).
- An Internet Service Provider (ISP).
- A web browser.
Example
```Enter the temperature
```Enter the temperature:
= 200) { echo "H"; } elseif ($temp >= 100) { echo "O"; } else { echo "L"; } } ?> ```