nabs viva presentation

7/30/2019 Nabs Viva Presentation

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W EB TECHNOLOGY PRESENTED BY:

NABEELA JASMINE


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What is web technology?

Web technologies related to the interfacebetween web servers and their clients.This information includes markup

languages, programming interfaces andlanguages.


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INTERNET PRINCIPLES

TCP/IPUDPIP Addresses

domain namesthe domain name systemURL's


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S ITE TYPES Public web sites:

A web site is one that is not explicitely restricted to aparticular class of users

Intranet websites:An intranet website is a site that is private to a particular organization generally run with a private network rather than on the internet at large

Extranet websites: An external web sites is a website that is available to alimited class of users, but is available via the publicinternet.


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DESIGN CONSIDERATION :(i) Grouping by interactivity:

Static sites:a static site is a one where content is relatively fixed andusers are unable to add effect the look or scope of the data.

Interactive sites:some sites are commonly related sites that allow the usersto modify the content such sites are called as interactivesites.


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(ii) Grouping by size:

Very small siteSmall siteMid-size site

Large site

Very large site

(iv) Grouping by purpose:Commercial sites:Informational sites:


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Entertainment sites:Navigational sites:Community sites:Artistic sites:Personal sites:


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S ITE ARCHITECTURE 2 types :

Logical structure :It describes documents that are related to other documents

Physical structureIt describes where a document actually lives

Organisational structure:(i) Linear :books written that one page follows another in

this model(ii) Grid :a spatial organization its good for collection of

related item a pure grid in common on the web(iii)Hierarchical :The most common hypertext structure on

the web is the tree or hierarchy form.


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SEARCH ENGINE

A web search engine is designed to searchfor information on the World Wide Web.The search results are generally presented

in a list of results and are often called hits.The information may consist of webpages, images, information and othertypes of files.


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HTML

HTML stands for Hyper Text MarkupLanguage. An HTML file is a text filecontaining small markup tags. The

markup tags tells the web browserhow to display the page

. An HTML file must have an htm orhtml extension. It can be createdusing a simple text editor.


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HTML Tags

Headings

ParagraphsLine breaks

Html frames

HTML FORMS:

Text Fields

Radio buttonsCheckboxes


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XML

Extensible Markup Language (XML) is amarkup language that defines a set of rules for encoding documents in a formatthat is both human-readable and machine-readable

It focused on what the document is.


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DIFFERENCE BETWEEN HTML AND XML

XML was designed to transport and store data, withfocus on what data is

HTML was designed to display data, with focus onhow data looks

HTML is about displaying information, while XML isabout carrying information.


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It uses a Document Type Definition (DTD) and an XMLschema to describe the data.


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ACTIVE X AND OLE

ActiveX is a framework for defining reusablesoftware components in a programminglanguage-independent way. Software

applications can then be composed from one ormore of these components in order to providetheir functionality.Object Linking and Embedding (OLE) is atechnology developed by Microsoft that allowsembedding and linking to documents and otherobjects


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STREAMING

Stream is a continuous flow of data from a source process to

a destination process.


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SOCKET

A socket is an endpoint of atwo-way communication linkbetween two programs runningon the network.


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TYPES OF S OCKET

Stream sockets interface to the TCP(transmission control protocol).

Datagram sockets interface to theUDP (user datagram protocol).

Raw sockets interface to the IP(Internet protocol).


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FIREWALL The firewall may be a single computer system or a set of two or more system that co-operate to perform the firewall function.

TYPES OF FIREWALL?The following are the three types of firewall,

Packet Filtering :Packet filters act by inspecting the "packets"which transfer between computers on the Internet. If a packetmatches the packet filter's set of rules, the packet filter will drop(silently discard) the packet, or reject it

NAT(Network Address Translation) :It is a technology thatallows your home network to share internet access.

Proxy server : A proxy server is a gateway from one network toanother for a specific network application, in the sense that itfunctions as a proxy on behalf of the network user


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HACKERS

Computer hacking is the practice of modifying

computer hardware and software to accomplish agoal outside of the creators original purpose

People who engage in computer hacking activities

are often called hackers


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ENCRYPTION Encryption is define as a process of converting theplain text into chipper text.

TYPES :

Symmetric key encryption

Asymmetric key encryption


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VPN The virtual private network (VPN) technologyincluded in Windows Server 2003 helps enablecost-effective, secure remote access to privatenetworks.

There are two types of VPN connections:

Remote access VPN

Site-to-site VPN


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IDEAL FIREWALL

The ideal firewall defines your security

requirements and helps to figure out what generaltype of security our business requires. It alsoexplains exactly how to configure your border gateways to achieve that level of security.


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THANK YOU!!!!

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