Web engineering is the study of creating high quality web-based applications by extending principles of software engineering. The document discusses key concepts like the Internet, which connects computers globally using common protocols, the World Wide Web which allows sharing of information over the Internet using HTTP, and distributed systems which involve coordinating actions across multiple machines. It also defines the client-server model where servers provide resources and clients request services, and distinguishes between static websites with fixed content and dynamic websites that can update content dynamically.

2. Md. Hasan Imam Bijoy
ID: 182-15-11743
Section: E
Department of CSE
Daffodil International University
Presenter

3. Agenda
1 What is Web Engineering?
2 Internet
3 WEB (WWW)
5 Distributed System
6 Client Server Paradigm
7 Static & Dynamic Website
4 Internet Vs WEB

4. Web Engineering?
 Web Engineering is the study of the process, used to create
high quality web-based applications
 Web engineering draws heavily on the principles and
management activities found in software engineering process
 Web engineering extends software engineering to web
application

5. Internet
 The Internet is a massive network of networks, a networking
infrastructure.
 It connects millions of computers together globally, forming
a network in which any computer can communicate with any
other computer as long as they are both connected to the
Internet.
 Information that travels over the Internet does so via a
variety of languages known as protocols.

6. INTERNET VS WEB
● Internet
○ A physical network of networks connecting billions of computers and other
devices using common protocols (TCP/IP) for sharing and transmitting
information
● World Wide Web [Old]
○ A collection of interlinked multimedia documents
(web pages stored on internet connected devices and accessed using a common
protocol (HTTP))
● Key distinction:
○ The internet is hardware plus protocols while the world wide web is software
plus protocols
○ The world wide web is an application using the internet to transmit information,
just like many others, for example, email, SSH, FTP
VS

7. WEB
 World Wide Web
 The World Wide Web, or simply Web, is a way of accessing
information over the medium of the Internet.
 It is an information-sharing model that is built on top of the
Internet.
 The Web uses the HTTP protocol, only one of the languages
spoken over the Internet, to transmit data. Web services,
which use HTTP to allow applications to communicate in
order to exchange business logic, use the Web to share
information.

8. Distributed System
 Distributed computing is a field of computer science that
studies distributed systems. Also known as distributed
computing
 System with multiple components
 Located on different machines that communicate and
coordinate actions
 Appear as a single coherent system to the end-user.

9. BENEFITS AND CHALLENGES OF DISTRIBUTED SYSTEM
 Benefits
 Computing happens independently on each node
o easy and generally inexpensive to add additional nodes and functionality as
necessary
 Efficient because work loads can be broken up and sent to multiple machines
 The system generally doesn’t experience any disruptions if a single machine fails
 Challenges
 Fault-tolerant as they can be made up of hundreds of nodes that work together

10. CLIENT-SERVER PARADIGM
 Client–server model is a distributed application structure that partitions
tasks or workloads between the providers of a resource or service, called
servers, and service requesters, called clients.
 Server program sends copies of documents on request
 Requires computer on Internet and server software always running
 Client program sends message to server to request copy of document
 Clients and servers communicate via TCP/IP
 Client and server may establish "persistent connection" so that all pages
after first arrive more quickly

11. Static Website Vs Dynamic Website