Saturday, 28 July 2012

DEFINATION AND BASIC CONCEPTS OF CLOUD COMPUTING

cloud computing
          Hello friends after successful post on networking osWorld is now goin to post on cloud computing.let me know you that future of cloud computing is very bright because more and more companies are going on concept of cloud computing but engineers of cloud computing are not much so friends future of cloud computing is very bright as per my openion.in this article i am going to teach you basic concepts of cloud computing like what is cloud computing?,basic clouds of cloud computing,defination of cloud computing.
           cloud computing is general term that hosted services provided on internet is called the cloud computing.a cloud can be a public or private.a public cloud is sells the services to the any one on internet currently amazon has the biggest public cloud.private cloud is sells the services to the limited number of people on internet.it will secure.
           there are more two clouds are available except public cloud and private cloud which are hybrid cloud and community cloud.this cloud is combination of public cloud and private cloud so it is known as hybrid cloud another is community cloud which is used to share a cloud of same community. for example suppose a goverment company is share a cloud to all goverment company but non goverment company can not share this cloud that's why this type of cloud are known as community cloud.
            so friends in this article i tried my best to teach you basic concepts of cloud computing.i hope you people like this article.if you like then share it to your friends on social networking sites.

Thursday, 19 July 2012

DIFFERENCE BETWEEN SWITCH ROUTER AND HUB.

inter connected device
               Hello friends after successful post on basic topologies osWorld is now going to post on inter connected devices.in networking interconnected devices are commonly used.there are four types of interconnected devices hub,switch,router and bridge.we know that we can connect two pc via lan cable easily. but if we want o connect more then one pc then we must have to use different topologies which is discussed in previous article.but there must be require interconnected device like hub or switch.so we get back to the point and let us talk about four basic interconnected device.

1:-HUB

hub
                 hub is simply broadcast the message they do not know about the receiver.suppose there are 10 pc connected to hub.from the left hand side no 1 pc wants to send the message to the pc number 9 which is right side of the hub.then hub receive the message from pc number 1 and broadcast the message in all over network.this message is received by the pc who really wants that message.in this case receiver has to check that message is for it or not. 

 

2:-SWITCH

switch
                switch is same as hub in structure.but the difference between switch and hub is that switch do not broadcast the message in the network.suppose in previous example we use switch instead of hub then switch receives the message from pc number 1 and sends that message to the pc number of 10 instead of broadcasting the message.

 

3:-ROUTER

router
               Routers are very common today in every network area, this is mainly because every network these days connect to some other network, whether it's the Internet or some other remote site. Routers get their name from what they do.... which is route data from one network to another.
For example, if you had a company which had an office in Sydney and another one in Melbourne, then to connect the two you would use a leased line to which you would connect a router at each end. Any traffic which needs to travel from one site to another will be routed via the routers, while all the other unnecessary traffic is filtered (blocked), thus saving you valuable bandwidth and money.
There are two types of routers: 1) Hardware routers 2) Software routers. 

4:-BRIDGE

                 bridge is same as switch but only one difference is there between switches and bridges is that bridge can reform the signal.this functionality is not provided by switch.

Tuesday, 3 July 2012

BASIC TOPOLOGIES USED IN NETWORKING


              Hello friends after successful post on android osworld is now going to post about networking.network means connection of 2 or more devices using switch,hub,or router.switch,hub and rourter are called interconnected devices.today i will talk about 4 basic topologies which are used in networking.folloing are the basic four topologies.

      1:-mesh topology
      2:-star topology
      3:-ring topology
      4:-bus topology

1:-mesh topology










                              in this topology every device is connected to remaining all devices in the network.we can say every devices in the network are directly connected to each other.main advantage of mesh topology is if any connected link is fail then also whole network is in active state.


2:-star topology



                         





        in star topology every devices are connected to hub.they can communicate via hub.in star topology there are multipoint connection between devices and point to point connection between device and hub.easy to reconfigure and isolation.

3:-ring topology



                           in ring topology every devices connected via repeater.there are point to point connection between every devices.in ring topology we can communicate in unidirecation only.if any device is fail we can say whole network is death.repeater is used for regenerate the origenal signal.

 

4:-bus topology


                           in bus topology there is one backbone line and n drop lines every device is connected to backbon using tapes via drop lines.in bus topology there is multipoint connection between all devices.becauseof that multi point connection not easy to isolation in bus topology.

             so friends here i tried to give my best if you like this article then share it to your friends on facebook and twitter...

RELATED ARTICALS:-
1:-INTRODUCTION TO COMPUTER NETWORKING
2:-ADVANTAGES OF COMPUTER NETWORKING
3:-DISADVANTAGES OF COMPUTER NETWORKING

Monday, 25 June 2012

FREE AIRTEL GPRS TRICK FOR JULY 2012

free airtel gprs trick for august 2012
           hi friends after long time i come back with new proxy for free airtel gprs for july 2012.by using this trick you can access free airtel gprs on your mobile.so use free internet on your mobile using airtel just follow the step.



 step-1:-create a new gprs settings on your mobile.

step-2:-connection name:-Airtel Free Gprs

step-3:-apn:-airtelgprs.com

step-4:-proxy:-80.239.242.253

step-5:-proxy port:-80

step-6:-homepage:-203.115.112.5

step:-7:-save the settings


                after save the settings just restart your phone and enjoy free gprs airtel trick on your mobile.
tags:-frees airtel gprs trick,airtel free gprs trick for july 2012,settings for free gprs on airtel,free internet tricks for airtel.

Wednesday, 20 June 2012

BLOCK FACEBOOK ON COMPUTER VIA FB LIMITER


Features Of FB Limiter

  • Block facebook and youtube access on your computer to anyone who uses it (Normal Lock)
  • Limit facebook and youtube access to specific times during the week (e.g. Allow your kids to use facebook only one hour a day) (Time Lock - Pro version)
  • Block facebook and youtube access to yourself for specific time duration. In cases when you are too much distracted and want to be sure you will not get a chance to use facebook or youtube. (Total Lock - Pro version)
  • Control access to facebook on daily basis. (e.g. You could limit usage of facebook to just one hour daily) (Duration Lock - Pro version)

How To use Fb Limiter?

Grab your free copy of FB limiter by clicking here.Install and run the software on your computer.You will need to register for a free account to unlock the software.Once registered you will be greeted by a friendly user Interface (see screenshot below)

block facebook via fb limiter

Now you can block these website on a single click of mouse.
Another great feature of this softwae is that it is password protected.Even if somebody know that you are blocking websites using FB limiter still they won’t be able to unblock them as the software will ask for a password before it can be used.
This software is compatible with windows xp service pack 2 and later.So test out this software and share you experience via comments

Tuesday, 19 June 2012

WHY ANDROID LOGO IS GREEN?

android logo
             After successful post on cloud computing osworld is now going to post on android logo.
i think you people enjoy this article.todays my subject is why android logo is green?      
             How do you grow a business? There are many ways, but one is to pay others to help you. And according to paidContent and “sources who are familiar with the deals,” that’s how Google is growing it’s Android business. Apparently, Google is sharing advertising revenues with handset makers that build Android handsets. And here I thought that Android was simply a solid operating system.
I don’t know if the report is true, but I’m not sure I care all that much and more importantly, I wouldn’t be surprised by such a deal. Google’s core competency from a revenue perspective is in advertising. But it can’t simply earn advertising dollars on it’s own — it has to partner with other entities in some way. Today, Google matches up ad content with created content to show contextual, targeted ads. It makes a cut and so does the content partner. There’s a precedent for “browser money” too — Google pays Mozilla to be the default search engine in Firefox, for example. There could even be revenue sharing at work here, but even if not, Google is essentially paying Mozilla to get its product in front of more eyeballs, which in turn, potentially generates more ad revenue for Google. With that approach, why would anyone be surprised that Google could be sharing advertising revenues with handset makers? It’s the Google way and it’s also worth noting that it accounts for nearly 90% of Mozilla’s revenue.
Now the other question is — should Google be doing this? That’s not an easy one to answer and opinions are going to vary wildly. I’d rather see a product deployed solely because it’s a good product, but maybe that’s an old-school mindset. Times are changing, as are business models. And the reality is, Android actually is a good product. If it wasn’t, handset makers wouldn’t continue using it no matter how much they were getting paid — and I doubt that they’re making a mint off of mobile ad revenue sharing just yet, anyway. If they put out a crap hardware product due to a poor operating system, sooner or later, their reputation would be shot to pieces and their hardware business would slowly die.
Instead, I see more handset makers adopting Android and — more importantly — more consumers buying Android phones. Is that because Google is paying companies to build Android devices? It could be part of the reason, but don’t overlook the fact that Android isn’t a bad mobile platform. And aside from the fact that we’re potentially talking about revenue sharing for hardware and not software, how is this different than the business model Google has followed for years? Personally, if it’s true, I think it’s ingenious and it explains why the Android logo is green.
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