Download basic of computer pdf2 from here
Showing posts with label Quantitative Aptitude. Show all posts
Showing posts with label Quantitative Aptitude. Show all posts
Thursday, August 8, 2013
Computer Basics Pdf2
Computer Basics Pdf
Computer Basics Pdf Click Here
The OSI Model - Study Materials for IBPS IT Officers Exam 2013
In this model, similar types of communication functions are grouped into Layers. There are 7 layers in this Model. Those are,
- Physical Layer
- Data link Layer
- Network Layer
- Transport Layer
- Session Layer
- Presentation Layer
- Application Layer
Each layer helps it's above layer to establish an error free communication, in other words, each layer depends on its below layer to establish an error free communication.
How to remember these names????
Here the order is very important. If anybody asks you about these layers, you should start with Physical and end with Application Layer. You should not jumble these names according to your convenience. So you should remember these names with an order. Well, there are several techniques are there to remember these type of names. One of those technique is, making a funny name or sentence with the STARTING letters. Just, write the starting letters of these layers.
P D N T S P A
Now make a funny sentence, here are some examples
- Please Do Not Touch Steve's Pet Alligator
Or
- Please Do Not Throw Sausage Pizza Away
Now I bet you never going to forget these names and order again :)
Ok, now lets have a look at the Functionalities of these Layers...
- Physical Layer : This is the First or Lowest layer of the OSI model. It takes care about the Physical Connections.
- Data Link Layer : This layer Encodes the data packets and provides error free node to node transmission. It is divided into two sub layers. Those are
- Media Access Control Layer (MAC Sublayer in short)
- It helps the computer to get the access of data transmission
- Logical Link Control Layer (LLC Sublayer in short)
- It controls the order, flow and errors of the frames (Frame synchronization)
- Network Layer : This layer helps in Switching and Routing (connecting and transmitting), and also creates virtual circuits ( Imaginary paths for transmission)
- Transport Layer : This layer helps in providing Transparent data transmission. Its also checks whether the data completely transmitted or not.
- Session Layer : This layer is responsible for the Transmission Sessions. I mean Starting, Maintaining and Terminating the Communication.
- Presentation Layer : This layer provides the data Independence ( simply you can remember that this layer is responsible for the data Presentation :) I mean, how you are presenting data (without any leakage)
- Application Layer : This is the topmost layer, this layer directly interacts with the end user. This layer is responsible for checking whether the claimed user is genuine or not.
Still having problems with these functions??? Have a look at the following diagram. It will be easier for you to understand :)
Very good. Now you know about the OSI model and It's Layers :) You know that it was developed by ISO.
Hey, you know one secret? ISO dint invent any new model. It just COPIED some old model and modified it.. Thats all.
Once there was a model called TCP/IP model (Transport Control Protocol / Internet Protocol) with this name itself, you can define its functionality :) It has lil complicated structure with only 4 Layers. Those are
- Network Interface Layer
- Internet Layer
- Transport Layer
- Application Layer
ISO Just elaborated this model and divided some of these layers into EXTRA LAYERS and developed OSI model. have a look at the following Diagram, so that you can understand the difference :)
Number System Problems with Solutions - Pdf Download
There are 25 questions in this paper. Try to solve them in 30 minutes (without checking solutions). Ofcourse, for beginners it may appear to be little difficult task to solve them in less time. But trust us friends, with little practice you surely can do this. And one more good news is, we are presently working on a video tutorial on Number Systems shortcuts. Possibly you can get that by tomorrow's evening. We hope these materials will come handy in your preparation. That's all for now friends. You can download the Number Systems practice problems pdf file from below link. And please use the comments section below if you have any doubts regarding this practice paper. All the Best :)
Trigonometry Basics - Pdf Free Download
Friends, in today's post we are going to discuss one of the very important topic of aptitudeTrigonometry. The origins of the word Trigonometry are two Greek words. Trigonon and metria. The word Trigonon means Triangle and the word Metria means to Measure. In simple words Trigonometry is all about Triangles and their angles. This deals with the ratios between the sides of right triangles with reference to either of its acute angles and enables you to use this information to find unknown sides or angles of any triangle. This is the brief introduction of Trigonometry.
In SSC CGL and some other competitive exams you will face questions from Trigonometry. We made this small pdf ebook by keeping those aspirants in mind who are going to write SSC CGL exam, but this also will help other aspirants who are having trigonometry as a subject.
Geometry Formulas - Pdf Download
Friends, with this post we are giving you the pdf file of geometry formulas. In this small ebook (can we call a single page pdf file as an e book???) we have included all important formulas of geometry (both two dimensional figures and and three dimensional figures). Just take a printout of this page (it hardly will cost you 1 Rupee). This will help you a lot in reviewing all geometry formulas. We have made this pdf file for those people who are going to appear for the SSC CGL Tier I exam. But this will helpful for those people who are appearing for different types of competitive exams which are having geometry as one of their subject. All the best and happy preparation :)
Sunday, July 21, 2013
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