Networking Concepts Quiz

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Questions and Answers

What type of network does WAN represent?

Wide Audio Network

Wireless Area Network

Wide Area Network (correct)

Web Area Network

Which statement about LAN and WAN is true?

The propagation delay in LAN is shorter than in WAN. (correct)

WAN has a higher speed than LAN.

WAN's design and maintenance is easier than LAN.

LAN covers a larger geographical area than WAN.

Which transmission medium is typically used in LAN?

Coaxial or UTP cable (correct)

Microwave links

Fiber optic cables

Satellite links

In a client/server model, who fulfills the request made by the client?

The server program Signup and view all the answers

What protocol does the World Wide Web primarily use for communication between clients and servers?

Hypertext Transfer Protocol (HTTP) Signup and view all the answers

What is the primary role of a web server in the World Wide Web?

To store files and documents Signup and view all the answers

When a user enters a URL, what is the first step taken by the browser?

Request the IP address from the Domain Name Server Signup and view all the answers

What distinguishes the Internet from the World Wide Web?

The Internet is a physical network, while the Web is a service. Signup and view all the answers

What is the main characteristic that distinguishes the Intranet from the Internet?

Intranet is a localized network. Signup and view all the answers

Which of the following best describes the function of an Extranet?

It securely shares information with external partners. Signup and view all the answers

Which of the following statements regarding WAN speed is correct?

WAN speed is often slower than LAN speed. Signup and view all the answers

Which of the following best describes the coverage of LAN?

Covers small areas like within a building Signup and view all the answers

What identifies each computer on the Internet uniquely?

IP address Signup and view all the answers

What is a primary reason that Intranets are often more expensive than the Internet?

They require specialized hardware for security. Signup and view all the answers

What is a significant advantage of using an Extranet?

Facilitation of collaboration with external partners. Signup and view all the answers

Which statement is true about a Local Area Network (LAN)?

It is confined to a limited area like a home or school. Signup and view all the answers

How does the reliability of Intranets generally compare to that of the Internet?

Intranets are more reliable due to controlled access. Signup and view all the answers

What describes the TCP/IP protocol used by the Internet?

It stands for Transmission Control Protocol/Internet Protocol. Signup and view all the answers

What is the main difference between WAN and LAN?

LANs are confined to a single building or area. Signup and view all the answers

Which of the following is a disadvantage of the Internet compared to Intranets?

Less safe due to open access. Signup and view all the answers

What does an IP address consist of?

Network component and host component Signup and view all the answers

What does the '.edu' domain extension typically indicate?

Educational purposes Signup and view all the answers

What is the primary role of a Domain Name Server (DNS)?

To translate domain names into IP addresses Signup and view all the answers

Which of the following domain extensions is associated with non-profit organizations?

.org Signup and view all the answers

What does URL stand for?

Uniform Resource Locator Signup and view all the answers

Which protocol is specifically used for transferring files over the internet?

FTP Signup and view all the answers

Which of the following is NOT a type of domain extension?

.zip Signup and view all the answers

What component of an IP address is typically represented as a number from 0 to 255?

Both network and host components Signup and view all the answers

Which of the following is an example of a country-specific domain extension?

.in Signup and view all the answers

What does the protocol part of a URL dictate?

How the web browser should handle the file Signup and view all the answers

What is the primary function of a web browser?

To interpret and display web pages Signup and view all the answers

What does a web server do when it receives a request for a web page?

It searches for the web page and sends an HTTP response Signup and view all the answers

What is a unique Uniform Resource Locator (URL) associated with?

A web page Signup and view all the answers

Which of the following describes an IP address?

It is a unique logical address assigned to a device over a network Signup and view all the answers

When a web browser displays a page, what does it primarily read and interpret?

HTML files Signup and view all the answers

What happens if a web server cannot find a requested page?

It sends an HTTP response: Error 404 Not found Signup and view all the answers

Which of the following is NOT a commonly used web browser?

Microsoft Word Signup and view all the answers

What do hyperlinks in a web page typically link to?

Other web pages Signup and view all the answers

How are external files referenced within HTML files?

They are linked to but not embedded Signup and view all the answers

Which statement about a website is true?

It is a collection of web pages Signup and view all the answers

Study Notes

Introduction to Web

This lecture covers basic web concepts.
The presenter is Dr. Heba Mamdouh from Minia University.

Internet

The Internet is a worldwide system of interconnected computer networks.
Networks use protocols (like TCP/IP) to exchange data.
Each computer on the Internet has a unique IP address.
The Internet is accessible globally.

Advantages and Disadvantages

Advantages: Social networking, education, entertainment, internet services.
Disadvantages: Threats to personal information, spamming, cybercrime, virus attacks.

Intranet

A private network within organizations.
Used to share resources and information among coworkers.
Access is limited to authorized personnel within the organization

Internet vs. Intranet

Internet: Worldwide network, accessible to everyone, less secure, less reliable, less expensive
Intranet: Localized network, restricted access, more secure, more reliable, more expensive

Extranet

A private network that securely shares information or operations with external partners.
Extends an organization's intranet.
Uses the Internet to connect with authorized outsiders in a controlled manner.
Enables collaboration with customers and suppliers.

Extranet vs. Intranet

Extranet: Internal network accessible externally, extension of the intranet
Intranet: Internal network NOT accessible externally, limited to internal users

Network Overview

A network is two or more computers connected for communication and resource sharing (e.g., printer, internet access).
Components include workstations, servers, switches, routers, and printers.

Networks (LAN and WAN)

LAN (Local Area Network): Usually confined to a single building or group of buildings. Connects computers in limited areas (schools, labs, homes, offices).
WAN (Wide Area Network): Spans larger geographical areas, often uses public or commercial communication systems (e.g., the internet).

The Client/Server Model

A relationship between two computer programs (client and server).
Client: Requests service (like filing or database).
Server: Fulfills the request and sends results.

The Internet Client/Server Model

Client: Web browser
Server: Web server
Client sends request, server responds

World Wide Web (WWW)

A vast collection of files and documents stored on computers (servers).
Written in HTML (Hypertext Markup Language), which instructs browsers on how to display information.
A technical definition of the WWW is all resources and users on the internet using the Hypertext Transfer Protocol (HTTP).
The internet is not the same as the web. The web uses the internet to pass information.

WWW Operation

Steps:
- User enters a URL (like www.yahoo.com).
- Browser requests the domain name server for the corresponding IP address.
- After receiving the IP address, the browser sends the HTTP request.
- The server finds the requested web page and sends it back with an HTTP response.
- The browser interprets the page and displays it.

Web Page

A document on the WWW, stored on a web server, and viewed using a web browser.
Can contain text, graphics, audio, video, and hyperlinks (links to other pages)
A collection of linked web pages on a server is called a website.
Each web page has a unique Uniform Resource Locator (URL).

Web Browser

Application software that allows users to view and explore information on the web.
Users request web pages by entering URLs in the address bar.

Most Common Web Browsers

Internet Explorer (Microsoft)
Google Chrome (Google)
Mozilla Firefox (Mozilla)
Opera (Opera Software)
Safari (Apple)

How Browsers Display Web Pages

Browsers read and interpret HTML files.
Format the page for display.
Download external files (like images) from the server and display them.
HTML files are text files containing references to external files, not embedded files..

Web Server

A specific computer that stores the content of websites (web pages).
Software component that responds to requests for web resources.

How Web Servers Work

If a client requests a web page, the server searches for the page.
If found, the server sends the page to the client with an HTTP response.
If not found, the server sends an HTTP response error (404).
If the client requests other resources, the server may contact an application server for the appropriate response.

IP Addresses

A unique logical address assigned to a device on the network.
Identifies a computer's location.
Is a unique set of numbers (e.g., 137.170.4.124).
32 bits (4 bytes) long.
Composed of network and host components.

Domain Name

Names an organization or entity on the Internet.
Easy-to-remember alternative to IP addresses.
Translated to IP addresses by DNS (Domain Name Servers).

Domain Extension Types

.com: Company/commercial
.net: Networks
.org: Organizations
Country-specific extensions (e.g., .us, .uk)
Others (e.g., .biz, .info, .tv)

The Domain Name System (DNS)

Associates domain names with IP addresses.
Automatically translates domain names to IP addresses.

Uniform Resource Locator (URL)

Identifies the location of a document on a website.
Comprised of protocol, subdomain/server, domain name, folder name, and file name (e.g., http://www.example.com/folder/page.html).
The protocol part (e.g., HTTP) tells the browser how to handle the file.

Internet Protocols

Rules governing client-server communication on the internet.
Multiple protocols are needed for different internet functions. (e.g., HTTP, FTP, SMTP, POP, IMAP)

FTP: File Transfer Protocol

Used for exchanging files between computers.
Commonly used by web developers to transfer webpage files.
Also used to download software and files from other servers onto an individual computer.

E-mail Protocols

Sending: SMTP (Simple Mail Transfer Protocol)
Receiving: POP (Post Office Protocol) or IMAP (Internet Mail Access Protocol)

HTTP: Hypertext Transfer Protocol

Set of rules for exchanging files (e.g., text, images, videos).
Used for communication between clients (web browsers) and web servers.

Basic Web Programming

HTML: Defines the content of webpages.
CSS: Specifies the layout of webpages (style and formatting).
JavaScript: Programs the behavior of webpages.
Other dynamic programming technologies (e.g., ASP.NET, SQL, AJAX, PHP).

The Web Programming Triangle

A visual representation of the relationships between HTML, CSS, and JavaScript.
HTML structures the content, CSS styles the presentation, and JavaScript behaves webpages.

References

References to web tutorials for HTML, CSS, and JavaScript. (links provided).

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Description

Test your knowledge on networking concepts such as LAN, WAN, and the Internet in this engaging quiz. Questions cover various aspects of network types, server roles, and communication protocols. Perfect for students and professionals looking to refresh their understanding of networking fundamentals.