miércoles, 7 de mayo de 2014

How does the internet works?
What's an IP address?  Internet Protocol Address is a unique number of any devices on the Internet.

How many characters does an IP address have?  18 characters
What's the meaning of URL and which is another form to name it? Uniform Resource Locator and other name might be "web address"

In the Internet, the information travels directly from the nearest server to your computer. True or false? Why?  True, it search the IP who has the information you needs.

What's a Web Cache Server?  It’s a holding tank for the most popular writers.
Write all the devices mentioned in the video as a computer.  PC, Tablet, smartphone.

What's an ISP?  Internet Service Provider, they are people who provide other people their connection to the Internet.

What's the DNS?  Domain Name Server is to know which IP Addresses are connected to which URL's.

What is the analogy that the presenter uses to explain how Internet works?  Is like a telephone, where the cables connecting people in devices to the internet around the world.

What is Hypertext Transfer Protocol?  It transfer information into small packages and take different routes to be reassemble in your computer.

What does TCP mean?  Transfer Control Protocol.

In your own words, explain how Internet works. 

I think is like the cab where "The Architect" of the Matrix was, that was a big room, round, and there are many squares (like little screens) where the information goes from a big column in the middle of the room to your device. And the info flows through the room from a screen to another, growing and multiplying itself.

lunes, 24 de febrero de 2014

1.          What an Operating System (OS) is?

- An operating system (OS) is a collection of software that manages computer hardware resources and provides common services for computer programs. The operating system is an essential component of the system software in a computer system. Application programs usually require an operating system to function.

2.          Which are it{s characteristics?
Characteristics of a batch operating system include a computer running batches of jobs without ceasing. This is the type of system that the first computers used. Batch operating system computers were pricey.

3.          How can operating systems be classified?
Operating systems can be classified as follows:
  Multi-user: Allows two or more users to run programs at the same time. Some operating systems permit hundreds or even thousands of concurrent users.
  Multiprocessing : Supports running a program on more than one CPU.
  Multitasking : Allows more than one program to run concurrently.
  Multithreading Allows different parts of a single program to run concurrently.
  Real time: Responds to input instantly. General-purpose operating systems, such as DOS and UNIX, are not real-time.

4.          What is mobile operating system?
A mobile operating system, also called a mobile OS, is an operating system that is specifically designed to run on mobile devices such as mobile phones, smartphones, PDAs, tablet computers and other handheld devices. The mobile operating system is the software platform on top of which other programs, called application programs, can run on mobile devices.

5.          What is network operating system?
Abbreviated as NOS, an operating system that includes special functions for connecting computers and devices into a local-area network (LAN). Some operating systems, such as UNIX and the Mac OS, have networking functions built in. The term network operating system, however, is generally reserved for software that enhances a basic operating system by adding networking features. Novell Netware, Artisoft's LANtastic, Microsoft Windows Server, and Windows NT are examples of an NOS.

6.          What is a Multi-user Operating System (write some examples)?
Multi-user operating system allows the concurrent access to many users
of a computer. Multitasking is another name that is used for this
system. A multi-user operating system is a system in which sufficient separate resources are used. In this way a problem with one user does not disrupt the work of others. The common examples of multi-user operating system include VMS, UNIX, and mainframe operating systems which include MVS system.

'The common examples of multi-user operating system' include VMS, UNIX, and mainframe operating systems which include MVS system. A single user multi-tasking operating system is an operating system is capable of allowing multiple software processors to run at the same time.
7.          What is a multiprocessing Operating System (write some examples)?
Distributed Operating System is a model where distributed applications are running on multiple computers linked by communications. A distributed operating system is an extension of the network operating system that supports higher levels of communication and integration of the machines on the network.
This system looks to its users like an ordinary centralized operating system but runs on multiple, independent central processing units (CPUs).
'The common examples of multi-user operating system' include VMS, UNIX, and mainframe operating systems which include MVS system. A single user multi-tasking operating system is an operating system is capable of allowing multiple software processors to run at the same time.

8.          What is a multitasking Operating System (write some examples)?
A multitasking operating system is any type of system that is capable of running more than one program at a time. Most modern operating systems are configured to handle multiple programs simultaneously, with the exception of some privately developed systems that are designed for use in specific business settings.
With older examples of the multitasking operating system, managing two or more tasks normally involved switching system resources back and forth between the two running processes. The system would execute tasks for one, freeze that program for a few seconds, and then execute tasks for the other program. While this approach did create a short time lag for the operator, this lag was usually no more than a few seconds and still offered considerable more efficiency than the older single-task operating system.

9.          Which are the top 5 Operating Systems?

1.       Linux
2.       Windows 7
3.       Windows Vista
4.       Mac OS X
5.       Windows XP

10.       Wich are the top 5 Mobile Operating Systems?
Symbian:
Windows Mobile 7
Blackberry RIM
Apple iOS

Google Android

lunes, 20 de enero de 2014

Computer Devices


An input device is a hardware or peripheral device used to send data to a computer. An input device allows users to communicate and feed instructions and data to computers for processing, display, storage and/or transmission.

Input Devices:
- Graphics Tablets
-Cameras
-Video Capture Hardware
-Trackballs
-Barcode reader
-Digital camera
-Gamepad
-Joystick
-Keyboard
-Microphone
- MIDI keyboard
- Mouse (pointing device)
- Scanner
- Webcam
- Touchpads
- Pen Input
- Microphone
- Electronic Whiteboard

An output device is any piece of computer hardware equipment used to transmit or communicate the results of data processing by information processing. These devices include: speakers, monitors or projectors.

Output devices:

-3D Printer

-Braille embosser

-Braille reader

-Flat Panel

-GPS

-Headphone

-Computer Output Microfilm (COM)

-Monitor

-Plotter

-Printter

-Projector

-Sound card

-Speakers

-Speech-generating device (SGD)

-TV

-Video card