Internet, Intranet and Extranet

In this article ,I want to explain the basic difference of internet, Extranet and intranet.because some one can not understand the simple concept of Internet, intranet and extranet.
Internet:
              Simple definition of internet is type of network which is a  combination of interlinked computers and any one can connect it through ISP.There is no restriction in internet.Public can connect to internet anywhere from the world .Internet is a public network.
 
Intranet: 
                      Network of an organization which can not be accessed by anywhere outside the network. Intranet is a type of private network which is locally accessed in the organization.Intranet connects to internet but fire walled so no one can connect to intranet from outside the organization.
 

Extranet:
               The main difference between intranet and extranet is that extranet can also be accessed outside the organization.Accessing other organization network is called extranet.For example In extranet  users,employees of organization and clients, accessing the network from other network.It involves LAN and WAN. IF a telecom company of Pakistan  access the NADRA network for verification of customer identification, it will achieve through extranet.  

Wide Area Network(WAN)

WAN Wide Area Network:
                                          When we want to connect one LAN local area network to another LAN ,it is connect through WAN wide area network."Connectivity to some one LAN is called WAN wide area network".Accessing another LAN is WAN for us.For example ,if we want to access yahoo server from our Local area network LAN,actually we connect to anther LAN ,so accessing yahoo LAN is WAN for us.In the same way,if we want to access Google LAN or Hotmail LAN,these LAN are also WAN for us.
Connectivity procedures in WAN:
                                                     We can connect through WAN through two methods
1) Point to point
2) Point to multipoint

1) Point to Point Connectivity:
                                                            When we want to connect two branches through WAN, this is called point to pint connection.For example,We connect two branches of National bank of Pakistan.
 Technologies use in point to point connections are PPP and HDLC

 2) Point to Multipoint Connectivity:  
                                                                       When we want to connect many branches to single branch through WAN,this is called point to multipoint connectivity.For example,We connect many branches of National bank of Pakistan to main branch of National bank of pakistan.
Different technologies are use in it such as ISDN , frame relay, ATM , X.25, MPLS

Metropolitan Area Network(MAN)

In this article ,I will explain "what is Metropolitan Area Network?.Types of MAN and  Advantages of  Metropolitan area network". 
Metropolitan Area Network (MAN)
                                                MAN is an abbreviation  of  Metropolitan area network and define as "A network under a single administrative body".
"Single administrator is used for whole city."
"A network which is greater than 100 meters of LAN but smaller than WAN wide area network is called MAN."
"It is also define as a large computer network which extends to a city or large university campus."
                          "MAN is also characterized as high speed connection using fiber optic cable or other digital media." For example
1) Metro Ethernet 
2) Wireless MAN(example of wireless MAN is Wateen )
Types of MAN :
                              Following are three types of MAN technologies.
1) ATM
                    ATM (Asynchronous Transfer Mode) combines the characteristics of circuit switching and packet switching, which allows it to transfer even the real time data


2)FDDI
          FDDI (fiber distributed data interface ) use fiber optic cable for its basic infrastructure.Concept of FDDI is well explain in my previous article.


3)SMDS
                     SMDS (Switched multi megabit data service) allows the transmission of data over large geographical areas in the form of datagrams.


Advantages:


1) It is high speed connection
2) It has low Cost
3) Remove the cost of fiber by using high speed of 1000mbps wireless.
4) Centralized administrator. 

Procedures of making LAN

In this article , i want  to explain the concept of LAN and procedure of making LAN.Simply LAN is a abbreviation of local area network and explain as area in a 100 meters of network is called LAN or local area network.

Procedures of making LAN

                   Following are four procedures use in making LAN.

1)Ethernet

2)Token Ring

3)FDDI

4)Local talk(use only for apple computers)

1)Ethernet:

Interchange of data locally is called ethernet.

Attach LAN card in all computer.

we have to use central entity.

It can be hub or switch.

Following are types of making ethernet LAN.

!Star topology:We can make  ethernet LAN through star topology.Topo means network and logy means study

1) Central entity use in star topology

2) RJ45 connector use in it.

3) Use LAN card which support this technology.

4) It has IEEE 802-3standard .

5) single point of failure.

6) Multiple point of failure

!Token ring topology:

1) Logically entity in Token ring.

2) To share data  ring topology  can be used.

3) Maximum 255 computers can be attached

4) To transfer data we use ticket that name is token.

5)Token can move clockwise as well as anticlockwise.

6) Data transfer is slow

7) Other client have to wait for token

8) single point of failure

9) Co_axial cable use in it.

10) BNC connector use in it

11) It has standard 802-5

12) Hacker can break the security.

FDDI:

1) Fiber data distributed interface topology

2)Same topology of ring is use in it.

3)Two token use in it

4)one is clockwise and other is anticlockwise

5) Fiber cable use in  it.

6) speed is high but security also breaak in it.

Are Cisco Packet tracer and GNS3 simulators or emulators?.

Today I want to explain you that "Are Cisco Packet tracer and GNS3 simulator or emulators?. What is the difference between simulators and emulators?."
In other field of world, simulators and emulators have same meaning.A simulator is a software that provide the environment to the user to do work which is not real.A famous example for a simulator is the flight simulator that simulates the functionality of an aircraft . It is help full in the development process.


A emulator is a hardware which provides the real environment and functionality of  image operating system which work as a actual system.


Cisco Packet tracer is a simulator because it only provide environment to the user  to do work which is not real.It has limited functionality and completely help full for CCNA level but not completely help full of CCNP level.Cisco Packet tracer commands does not support completely.There is weak point exist in Cisco Packet tracer.


You can download Cisco packet tracer free from here.
http://www.packettracer.info/cisco-packet-tracer-version-5-2-software-downloads.html


GNS3 is a network emulator which provides the real environment and functionality of image operating system which work as actual system.Real operating systems run in to GNS3. A lot of RAM consume in GNS3. but it is completely help full at CCNP level.


You can download GNS3 free from here.
http://www.gns3.net/download

Virtualization through virtual box and VMware

Virtual box and VMware are the open source software which provide virtualization.These virtualization softwares are free to install . Virtual box is available as open source software under the terms of GNU General Public license (GPL) version 2.


Virtual box runs on windows,Linux,Macintosh,Solaris hosts and large number of guest operating system.VMware desktop software runs on Microsoft windows, Linux, and Mac OS X, while VMware enterprise software hypervisors for servers.


Basically with the help of virtual box and VMware ,we can install another computer in our computer.Both this software  help the user to install  multiple operating system in a single computer.There is a small window open in our computer and at the same time we can see the different operating system run in our computer.
                                It can support window servers also.We can install window server 2000,2003,2006,2008 etc. In the same way we can install Linux and red hat operating system in it.


Download Virtualbox 4.1.2 for windows host from following location.  http://www.virtualbox.org/wiki/Download

Download VMware Server

www.vmware.com › Downloads › VMware Server v2.0




So lets enjoy multiple operating systems in a single computer at the same time.......

Use of 3rd Party Android Application in BlueStacks Player

In this article,I want to inform about you that how can we install third party applications of android in the blue stack player.First of all you have to install the blue stacks player.I have already written about blue stacks player in my previous  article.


If you have not read my previous article.then first of all read this article.
http://arqamnetworks.blogspot.com/2011_10_12_archive.html

Blue stacks player has the ability to support other android devices application on our window PC.
                                                  If you have installed the blue stack player then click on the icon of android on your desktop.There is a option of get more application icon.Click this icon.then web browser will open the blue stacks player channel.

      There are different feature application on this channel.click subscribe the popular applications of blue stacks channel.it will add in to your android icon on your desktop.
Then install it and run new android application on your window PC.

Convert interface of Your Windows 7 or Vista into Mac OS Using Mac OS X Transformation Tool

Users want to use Mac operating system.but Mac operating system and PC are not available in Pakistan.Now users can enjoy the Mac operating system.
User can enjoy the graphical interface of  Mac OS in your window vista and window 7. So Mac OS transformation package tool is available on internet.we can download it free from internet and install the graphical interface of Mac operating system.

You can download the Mac transformation pack from the link below.

Download Mac Transformation Pack

http://www.winxsoft.com/stp/download.html

Enjoy the effects and interface of Mac in Windows!

Now Microsoft release window 8 beta version

After window 7, Microsoft has released the next operating system for window users.Window 8 is the next operating system of Microsoft and the successor of window 7.
Firstly Microsoft  decided to release window 8 beta edition only for developers.But now Microsoft has released window 8 pre beta version for common user.
Now you can download the beta version for window 8 easily.It is free to download which mean anyone can easily download the beta version and there is no need of registration for window 8 beta version.

                           
This version is not the final version for window 8 .Interface of window 8  may change but this means that Microsoft release this beta version for developer so developers can develop new applications for  upcoming operating system 
window 8 offered different packages.
1) 64-bit version of just the operating system
2) 64-bit version with various developer tools
3) 32-bit version of the OS
  This video link will help you.                                                                       

http://www.youtube.com/watchv=p92QfWOw88I


Download and Installation

-      You can download beta version of Windows 8 from here

http://windows8beta.com/tag/windows-8-beta-download

Minimum requirements 

1) 1 gigabyte (GB) RAM (32-bit) or 2 GB RAM (64-bit)
2) 1 gigahertz (GHz) or faster 32-bit (x86) or 64-bit (x64) processor
3) DirectX 9 graphics device with WDDM 1.0 or higher driver
4) 16 GB available hard disk space (32-bit) or 20 GB (64-bit)
5) Taking advantage of touch input requires a screen that supports multi-touch
6) you can also install window 8 beta on virtual box and Vmware

Run Android Application in Window XP and window 7 a Using BlueStacks Player

Blue stacks player software,helps the window XP and window 7 user to run android applications on our PC.
There are other few software exit in the market which help the PC user to run android application .But there are  some problems exist in these old software during running androids applications on windows.


There are following example to describes these problems.For example slow in performance and heavy load during running these applications


                                               Now these problems remove and blue stacks player  has released  which is fast in performance and it can run the android application quickly on windows PC.
Following are the features which already install in blue stacks player

1)    Pre install high resolution application
2)    It can syn up connection between androids devices

This demo video will better help you .........

so enjoy it and do not forget to post your comments.......