sâmbătă, 31 mai 2014
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vineri, 30 mai 2014
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joi, 29 mai 2014
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miercuri, 28 mai 2014
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Untangling the Cords of Mystery - Setting Up a Business Computer Network Without Prior Experience - Internet
Many business owners know their company needs multiple computers and also value the importance of those computers being able to connect to one source and communicate with one another. With IT support London being so expensive and with many businesses operating on limited revenues, it may be a better approach to set-up your own network and avoid costly technicians. The process of setting up your very own network is not as complicated as it seems, and can easily be done by following some basic instructions.
Which Type of Network Do I Need?
Deciding between wireless and traditional wired networks should be the first decision you make. Wired connections offer increased stability and speed, while wireless networks can be easily moved, re-configured and maintained without the hassle of cables and tangles. The issue of security is another aspect to consider; generally speaking, wired networks are less vulnerable to hackers and outside sources, who can connect to an insecure network from outside the building and beyond. The type of computers you are using also can play a role in the choice: wireless networks are better for laptops, while wired networks are most often used with desktops.Plug It In
The process varies depending on which network you selected, but the function is the same. Wired networks will need to have an Ethernet cable that runs from the computer to a router, which is a device that splits the incoming internet connection among multiple computers. Each computer will need to be connected via cable to the router, and the router will in turn be connected to your internet modem. Both the modem and the router will also need a power source. Wireless networks will be similar in how the router will be connected to the modem, but the wireless connection will broadcast out to all machines and subsequently be picked up by wireless cards on the devices (many traditional desktops may not come with wireless cards, but they can be purchased and installed to each computer; check the specifications of your particular system).
Install Software
Each computer will need to have software installed and possibly configured in order to be able to connect to the internet. This software may include the router software or wireless card setup software. Many modern computers running on traditional operating systems (Windows, for instance) have sophisticated "Plug and Play" technology that recognizes the internet connection without any configuration. IT support London companies can be consulted via phone for help setting up the configuration, and some internet service providers will help you in the event a problem arises.
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marți, 27 mai 2014
Types of Network Hardware - Computers - Hardware
There are different components and hardware devices that participate and create a computer network. Each one has a key role to play and functions on a different layer of the OSI model. Scroll below for a list of the various types of networking devices. A computer network is not made up of one machine or even one type of machine. It is a carefully designed system of different hardware components (networking devices) working in tandem with various rules and communication protocols. From the network scenario in a household, to a medium scale network in a school or mall to a large, border-crossing network of a corporation or service, a computer network is made up of various hardware parts, some standard and some rare and more complex. So, what are the different types of network hardware? Read on for a listing of such devices and a brief explanation of each.
Types of Network Hardware
Cables & Wires
Everything may be turning wireless nowadays but at least 2-3 wired connections have to exist somewhere in a computer network. Connecting a desktop to a router or the router to the modem, such connections are always wired and the common cable type used is CAT5 RJ-45. Wiring is typically thought of as being a Layer 1 (physical layer) device as raw data or signals are transferred from one end to the other.
NIC
Network interface cards is easily one of the most important components of a computer network. It is a hardware part that allows the computer to be identified amongst others in a network and allows the computer to connect to a network. It works in the physical and data link layer of the OSI model. This card provides the circuitry required to implement a networking standard. The most common NIC form used is Ethernet. Recent computers, both desktops and laptops have their NIC built on the motherboard, earlier computers needed an internal or external NIC to be added. Laptops with built-in Wi-Fi have wired and wireless NIC capability, but most desktops have only wired connection capabilities and will require a wireless adapter to connect wirelessly.
Hubs
Connecting more than one computer to a higher layer networking device like a router can be difficult, if you do not have a hub. A hub collects various devices through a wired connection and groups them into a segment. So, the network recognizes all devices connected to the hub, as one segment. Typical hubs allow Ethernet wired connections and have at least 4-5 ports on them and can have 8, 12 or even more ports. They are very simple devices, they do not manage or filter or function in any other manner, other than to act as a collection point. They operate in the physical layer of the OSI model.
Modems
A modem acts as a sort of converter or translator. It allows digital data or information to be transmitted over traditionally analog lines of transmission such as a telephone line. The word "modem" is a mix of two transmission terms, "modulate" and "demodulate", which are the two main operations performed. The digital signal from a computer is converted into analog form, sent over the analog medium and then decoded back into its digital form at the receiving end.
Routers
Routers can be thought of as the mailroom of a network. They receive incoming data packets, decipher their addressing information (where did they come from, where do they have to go) and send them accordingly. Routers are essentially used for traffic management. They function in Layer 3 (network layer) of the OSI model. Routers are much smarter than hubs, they can implement security protocols, assign IP addresses, both static and dynamic and can function in both the wired and wireless transmission band. There are different router types based on their area of use, such as home or small-use routers to enterprise routers, which are used for complex routing functions in large corporations.
Gateways
A gateway acts as the meeting point or go between point between 2 different networks, using different protocols. e.g. Network A uses one protocol, Network B uses another. A computer from A wants to communicate with a machine from B but due to the difference in protocols, it does not know how to communicate. It can adopt or add B's protocol but this is a tasking process and is not really efficient. Instead, a gateway will translate the request from the computer in A's network, into B's language and then translate the reply from B's language into A's. So, the 2 machines can communicate without any change in protocol. Gateways function in all layers of the OSI model, since they perform conversion or translation functions.
Wireless Access Points
An access point acts as a middle station for a network and helps in adding more users to it. They are connected to the network but act as a transmitter and receiver for the network signals, so other devices can connect to the access point and in turn will be connected to the main network. The best example for an access point scenario is a large house, where the router is located in the basement. So, the ground floor can receive the wireless signal but the first floor cannot, due to the network's limited range. An access point connected on the ground floor will receive the router's wireless signal and emit it to reach the first floor, enabling users on that floor to access the original network.
With advances in technology, the features and specifications of such devices may change or the device itself may become obsolete. But for now, this collection of types of network hardware remains constant; and at least one or two of the above devices can be found in any computer network.
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luni, 26 mai 2014
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Cable Internet - Tips For Cleaning and Organizing The Cables Around Your PC - Technology - Electronics
Almost every household has an internet connection and even more companies and offices used both cable TV and cable internet. Internet has become part of our day-to-day life and has almost become a necessity. It might be a familiar scene, a bundle of cables and connectors cluttering your workspace or your desk at home. The result, your desk looks unorganized and messy, which does not benefit your company's professional appearance or makes your home look like a disaster.
Another factor to keep in mind besides the look of your desk is fire hazard. All these cables might be a big fire hazard when they are not connected in a professional manner. Not even to mention the danger of tripping on a cable and being injured.
A simple solution to get rid of cables and wires is going wireless. Instead of your internet cable connected to your computer, consider plugging it into a wireless router. The router can be placed anywhere out of sight and internet is available throughout your house or office, available to any computer, phone or appliance with a wireless connection. Prior to buying a wireless router, you should check if your internet provider allows the use of a wireless router since there are some that do not allow it.
Using a wireless router is one way to get rid of your internet wire looks cluttered. How about the others? The keyboard, mouse and printer are usually connected to the CPU with wires too. These can be removed if you go completely wireless.
Have you ever thought of using a wireless keyboard, mouse or even a wireless headphone? These days there are many wireless solutions available. Replacing all connected appliances with a wireless option will require you to invest as they are quite expensive compared to those with wires. When considering this, you should bear in mind how much you are willing to spend. With a smaller budget, it might be clever to replace some components by grade-A wireless appliances rather than to use a cheap solution. It is best to use high quality equipment to keep efficiency standards high.
Are you not willing to go wireless or do not have the budget to do so? You might consider using a free solution. Roll up the cables to the length you need and stick them to the desk or table by using common adhesive tape. This way the cables are secured, fixated and are not a hazard anymore. Downside is, moving around will mean detaching the cables and fixing them up elsewhere.
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