Provides up to 2 128 (approximately 3.403×10 38 ) addresses.

How does the DNS (Domain Name System) work?

The Domain Name System translates domain names to IP addresses so that browsers can load Internet resources.

Hypertext Transfer Protocol is:

An application protocol for distributed, collaborative, hypermedia information systems.

HTTP is the foundation of data communication for the World Wide Web.

A protocol for secure communication over a computer network which is widely used on the internet.

HTTPS is a protocol for secure communication over a computer network which is widely used on the Internet.

Communication over Hypertext Transfer Protocol (HTTP) within a connection encrypted by Transport Layer Security or its predecessor Secure Sockets Layer.

HTTP, and allows us to access web services, request resources (pages, images) and transmit data between clients and servers.

The Hypertext Transfer Protocol is a stateless, client-server model for formatting requests and responses between computers on the Internet.

Web resources are reachable via unique identifiers called a Uniform Resource Locator or URL.

A URL with the port included looks like this:

https://ict.senecacollege.ca:443

https://ict.senecacollege.ca:443:port80

https://80:ict.senecacollege.ca:443

URLs can only contain:

Anything outside of a limited set of characters has to be encoded (spaces, non-ASCII characters, Unicode, etc.)

An unlimited set of characters.

Upon receiving a request for a URL, what will the server do?

The server will respond with an HTTP Response.

What do the response headers provide?

Extra metadata about the response, the resource being returned, the resource being returned.

What are HTTP headers ?

HTTP headers let the client and the server pass additional information with an HTTP request or response.

An HTTP header consists of its case-insensitive name followed by a colon (:), then by its value.

Structured text that uses logical links (hyperlinks) between nodes containing text.

A numerical label assigned to each device (e.g., computer, printer) participating in a computer network that uses the Internet Protocol for communication.

Provide implementations of the web's open standards.

Can communicate HTTP, DNS and other protocols over the network in order to request resources via URLs.

Contains parsers for the web's programming languages.

Can render, execute and lay-out web content for a user.

Contain security features and allow users to download and run untrusted code (code from a random server on the internet) without fear of infecting their computers.

Why test web applications on different platforms?

You do not know for sure which browser your users will have.

The web is a globally distributed set of:

applications - a combination of the above, providing rich user interfaces for working with real-time data or other complex information, alone or in networked (i.e., collaborative) ways.

resources, pages, documents, images, media - both static and dynamic user viewable resources (web pages), which link to other similar resources.

services - requesting data (JSON, XML, binary, etc) to be used in code (vs. looked at by a user)

domain names - Having simple structure made of several parts.

IP addresses - Numerical labels assigned to each device participating in a computer network that uses the Internet Protocol for communication.

If the web is linkable, what does that mean?

The web is linkable, which makes it something that can be indexed, searched, navigated, and connected.

WEB222 Quiz 1 P1

Authored by Daniel Pereira

Computers

11th Grade - University

Used 6+ times

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MULTIPLE SELECT QUESTION

30 sec • 1 pt

What is TCP/IP

Transmission Control Protocol and Internet Protocol

Communication protocols that define how data should travel across the web.

An application protocol that defines a language for clients and servers to speak with each other.

An address book for websites.

MULTIPLE SELECT QUESTION

30 sec • 1 pt

Why were domain name servers invented?

Domain Name Servers are like an address book for websites.

So that humans do not have to remember IP addresses.

Allows you to send and receive data on the web.

They are difficult to remember.

FILL IN THE BLANK QUESTION

30 sec • 1 pt

What is an IP address?

MULTIPLE SELECT QUESTION

30 sec • 1 pt

What is IPv4?

An IPv4 address consists of 32 bits.

An IPv4 address consists of 128 bits.

IPv4 reserves some addresses for special purposes such as private networks.

IPv4 is a redesign of the internet protocol.

IPv4 addresses are canonically represented in dot-decimal notation, consisting of four decimal numbers, each ranging from 0 to 255.

MULTIPLE SELECT QUESTION

30 sec • 1 pt

What is IPv6?

The exhaustion of IPv4 address space prompted the Internet Engineering Task Force (IETF) to explore new technologies to expand the addressing capability in the Internet.

A redesign of the Internet Protocol.

The address size of IPv6 is 128 bits (16 octets).

Provides up to 2¹²⁸ (approximately 3.403×10³⁸) addresses.

This is not deemed sufficient for the foreseeable future.

FILL IN THE BLANK QUESTION

30 sec • 1 pt

What is a Domain Name?

FILL IN THE BLANK QUESTION

30 sec • 1 pt

Describe the DNS (Domain Name System) with an allegory.

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WEB222 Quiz 1 P1

What is TCP/IP

Why were domain name servers invented?

What is an IP address?

What is IPv4?

What is IPv6?

What is a Domain Name?

Describe the DNS (Domain Name System) with an allegory.

How does the DNS (Domain Name System) work?

Which of these is a Domain Name?

Each device connected to the Internet has a unique IP address which other machines use to find the device.

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