Node
。。。Is each computer or device on the network.
。。。Node often shares resources such as printers,large hard disks and programs.
。。。Nodes are connected via cables.
。。。Nodes also can be added to and removed from the network with little or no disruption to the network.



Client
。Client is a computer and mobile devices on the network that requests resources from the server.
。Clients on the network (company employees) access the customer database on the server.
。On a client/server network,one or more computers act as a server, and the client access the servers.



Server
。。A server manages the resources on a network.

。。A server, sometimes called a host computer.

。。For example, a server might store a database of customers.

。。Server controls access to the hardware,software, and other resources on the
network and provides a centralized storage area for programs,data and information.

。。The differences between the server and client computers are that the server ordinarily has more power, more storage space, and expanded communications capabilities.



Hub
..Hub is a star network.
..Also known as central device.
..Hub provides a common central connection point for nodes on the network.
..All data that transfers from one node to another passes through the hub/switch.



Network Interface Card (NIC)
。。a network card, just sometimes called a network interface card.

。。Also the Adapter card, PC card, ExpressCard module, USB network adapter, or flash card that enables a computer device that does not have built-in networking capability to access a network.

。。NIC are available for both desktop and notebook computers.

。。Many of these NIC have more than one type of port, which enable different types of cables to attach to the card.

。。NIC also provide wireless data transmission.




Network Operating System (NOS)
~Is an operating system that organizes and coordinates how multiple users access and share resources on a network.

~Resources are the hardware, software, data, and information.

~For example, a NOS allows multiple users to share a printer, internet access, files and programs.

~NOS also is a set of programs separate from the operating system on the client computers that access the network.





Distributed processing
。Provides forecasting for inventory control, manages and tracks shipping of products, and provides information and analysis on inventory in warehouses.

。Distributed processing also strive to maximize the value of each shipment made by the company while keeping costs to a minimum. And this distributed processing also often integrate with quality control systems.




Host computer
。。sometimes called a server.

。。This is a computer that controls access to the hardware,software, and other resources on a network and provides a centralized storage area for programs, data, and information.





Network manager
～Network manager employee who installs, configures, and maintains LANs, WANs, intranets, and internet systems. And also uses the network operating system to establish permissions to resources.

～Network manager also identifies and resolves connectivity issues.



~Magnetic ink character recognition (MICR)


A character recognition system using special ink and characters which can read text printed with magnetized automatically in Banking industry almost exclusively uses MICR for check processing.





~Optical-character recognition (OCR)
< This device uses light source to read characters,marks, and codes and then converts them into digital data. OCR reads characters in OCR fonts too.




~Optical-mark recognition (OMR)
>> It is reading device too. This device got the same functions with OCR TOO. It uses light sources too to read marks and codes and then will converts them into digital data.

Optical-mark recognition reads hand-drawn pencil marks,such as small circles.







~Dot Matrix printer

DOT MATRIX PRINTER is an Impact printer that produces printed images when tiny wire pins strike ribbon.


=It is an Impact printer that forms characters by striking mechanism against inked ribbon that contacts paper.





~Plotters
>>> Plotter is a Sophisticated printer used to produce high-quality drawings.


>>> It is also a Large-format printer that creates photo-realistic-quality color prints.





~Photo printer
= Color printer that produces photo-lab-quality pictures.

=Many photo printers have a built-in card slot.

=PictBridge is a standard technology that allows you to print pictures directly from a digital camera.




~Portable printer

Small,lightweight, battery-powered printer that allows mobile user to print from notebook computer, Tablet PC, PDA , or smart phone while travelling.


This printer able to print in high quality and at a reasonable speed too.





~Fax Machine
Also known as facsimile machine. this is a device that transmits and receives documents over telephone lines.

Fax machine too allows us to send and receive electronic documents as faxes.





~Multifunctional Devices
Also called multifunction peripheral....it is an office machine which incorporates the functionality of multiple devices in one.


It too provides functionality of printer, scanner,copy machine and fax machine.


~Internet Telephones
=== is a powerful communications software application.


Internet telephones allow us to make phone and fax calls over Internet, LAN or ISDNThe next generation of PC-to-Phone/Fax calling is now available! we can make calls anywhere in the world from our PC over the internet ar highly competitive rates.


~Telephony

Telephony considered as a category of hardware and software that enables people to use the Internet as the transmission medium for telephone calls. Telephony is also a technology that provide voice communication over distances, specifically by connecting telephones to each other.
This had made human life convenient.


However, telephony does not offer the same quality of telephone service as direct telephone connections.

System Unit

Posted by karmun Pon comments (0)

♥ Expansion card Expansion card
...is an electronic circuit board that are installed in the motherboard.

...Expansion card too enhances system unit or provides connections to external devices called peripherals.

...It can be installed in computer and add more functionality to a computer.
For instance, user can add any new thing like sound cards in his computer to improve a computer's audio input and also a graphics card to give it more 3D graphics processing power.



♠network interface card
~Also known as a NIC, is a device that allows computers to be connected to a network.

~Network interface card allowed to communicate with each other using a given protocol or agreed
-upon language for transmitting data packets between the different machines, known as nodes.
-it is also an internal integrated transceiver mounted on the network interface card PCB. -this network interface cards acts as the liaison for send and receive date on the LAN or network.



♠Plug and Play Plug and Play (PnP)
= is a capability developed by Microsoft for its Windows 95 and microsoft had made the Plug and Play a selling point for its Windows operating system.

=PnP also gives users the ability to plug a device into a computer to let the computer recognize and discovery the device or a hardware component in a system.

= In many earlier computer systems, the user was required to explicitly tell the operating system when a new device had been added. With Plug and Play, the computer automatically configures cards and other devices as we install them.



♥ sockets
++ Sockets are interfaces that can "plug into" each other over a network. Once so "plugged in", the programs so connected communicate.

-Sockets too iss an opening on the motherboard that can hold an adapter card.




♥ Chips
not the fish and chips.

BUT.........
-is a small piece of semi-conducting material on which integrated circuits are etched. -integrated circuits contain many microscopic pathways capable of carrying electrical current.
Chips are packaged so they can be attached to a circuit board.




♠Slots
>> An opening in a computer where allowed the user to insert a printed circuit board. Slots are often called expansion slots too. this is because they allow user to expand the capabilities of a computer. The boards we insert in expansion slots are called expansion boards or add-on boards.





♥ Bus lines



a line that you cannot find any bus. ....
also not the lines for us to wait bus.....



BUT....
it allow processor to communicate with external peripherals attached to the adapter card.
-Bus width determines number of bits transmitted at one time.
-system bus connects processor and RAM.
-Word size is the number of bits processor can interpret and execute at a given time.







♠Serial port
PORTS usually is used to connect external devices to system unit.

-is an interface that can be used for serial communication
-tramits one bit of data at a time.
-connects slow-speed devices, such as mouse, keyboard and modem.





♥ Parallel Port
- Is a parallel interface that connects external devices that can transfer more than one bit at a time, such as a printer.

-Most personal computers have both a parallel port and at least one serial port.





♠Universal Serial Bus
USB port can connect up to 127 different peripherals together with a single connector type
PCs typically have 6 to 8 USB ports on front or back of the system unit.
Single USB port can be used to attach multiples peripherals in a daisy chain.


-First USB device connects to USB port on computer.



-Second USB device connects to first USB device



-Third USB device connects to second USB device and so on.





♥ Firewire Port
is it a port that can fire the wire?? NO.....

-Firewire ports are use to connects multiple types of devices that require faster data transmission speeds.
- It allows us to connect up to 63 devices together.









Careers in IT

Posted by karmun Pon comments (1)

webmaster
~~The person who is responsible for the website maintenances.

For instance:
-Writing HTML for Web pages
-manages the computer server
-creates or organize the information content
-organizing stucture and managing the technical programming aspects of a Web site
-responding to e-mails about the Web site
-keeping updated the site are the jobs


Every Company needs Webmaster vary in their use of the term. Webmaster needs to have acquired Web site creation skills and a technical person with some programming skills. The "technical" Webmaster needs to manage the authorization associated with file systems and
establish the entire corporate Web design and systematize the necessary technical resources.
Besides that, webmaster also need to put their created web site on a separate company's server or setting up one within the company to maintain and perhaps add content within established the creation or designed.



Computer support specialist
~~Computer support specialists assist individuals use computers when they are facing problems on computers. They tell people how to fix and sove the problems. They also make sure and maintain the system runs properly.

For instance:
-the functions including maintains, installs, verifying and updating the troubleshoots computer systems and various types of instructional purpose in school, lab and the works areas.
-including the responsibilities are hardware, software, network, security and digital equipment.


Technical writer

A technical writer is a professional writer who hired by a speaker to prepare scripts, workbooks, audios, videos, or articles on contract.

A technical writer need to design, write, organize, maintain, and updates technical documentation. Technical writer produces technical documentation for technical, business, commerce and consumer audiences. The purposes to produce documentation is to explain in the ways that non-technical people understand the technical issues. They are often copy writers and also to be responsible for writing how to manual for the software application.


Software engineer

A software engineer is the assenter programmers and also the skilled professional focused on the design and creation of software .According to the information searched in internet, this term is often confused with programmer, people thought that software engineering is barely the act of programming, but the two are immensely different disciplines.

-The functions of the software engineering are building the software system with the technical aspects.

-It is also the management of issues, such as budgeting, directing programming teams, and scheduling. And also creates the designs the programmer implements.


Network administrator

Network administration is an arduous task.The administrator responsibilities to provide technical support and assist end users of personal computers with software and hardware problems.
In conclude, network administrator is a person who manages a communications network within an organisation.

The administrator's responsibilities involve many different aspects and include such taks as network security and virus prevention, installing new applications, distributing software upgrades,documentation, monitoring daily activity, troubleshooting, enforcing licensing agreements, organizing a storage management program and backup program.


Database administrator

A person responsible for the integrity and security of a database. Database administrator's function is technical. Responsibilities include implementing,maintaning the database system, performance and designing.

A database administrator (DBA) is also similar to a database developer or designer. It need to archiving and backup data for the users and programs that need it. Database administrator also need to ensure the database is responding to requests quikly.


System analyst

System analyst communicates with client, collects data and transfer info to software engineers and then the software engineers will make the software. System analyst is also the person who configures computer systems for an organization or business. The analyst must understand the general objectives of the business so that the system analyst can choose the appropriate systems that may accomplish the goals of the business or the organization.

System analyst is responsible for translating the business requirements in to a specification. So that the client/server programmers or web developers can depending on the platform chosen for the software project.


programmer

Programmer is like software engineer but they only can do coding. Thus, this means that the programmer is the one who write the code. Through the information that i searched in net, i know that "before the Internet became widely used, most custom software development fell in to the category of client/server software. "

Computer programmers too must learn new programs as they appear on the market because the workload would be shared by both the client and the server.


About this blog

Copyright 2009 - intro to IT

Blogspot Theme designed by: Ray Creations, Ray Hosting.