Types Of Network Topologies

Network topology is called a geometric shape that are distributed workstations and the cables that connect. Workstations in a network are connected together by a physical connection, and purpose of the topology is to find the cheapest and most effective way of connecting to at the same time ensure system reliability, avoiding waiting times data transmission, allowing better control of the network and efficiently allow the increasing number of computers on the network. The most common ways that we can find in these networks are: network topology bus It all stations share the same communications channel, all data flowing through that channel and each contains information that appropriate. It is one of the most used and calls can be found in Ethernet networks. This type of network is simple to install, the amount of wire used is minimal, has a great flexibility to increase or decrease the number of stations and the failure of a station does not affect the network. However, a broken cable can let it totally useless. The drawbacks that we can find in this type of network are: The length can not exceed 2000 meters. Not too sure as other users can gather information without being detected.

Having a single bus, but several stations try to transmit at a time, only one of them will do. This means that many more stations have the network, the more complicated flow control. Ring network topology It all stations are connected together to form a ring, so that each station only has direct contact with two others. In the first networks of this type of data moved in one direction, so that all information had to go through all the stations up to the station where he stayed. The most modern networks have two channels and transmitted in different directions by each of them. Today you can find this setting in IBM Token Ring networks.

Such networks can increase or decrease the number of computers without difficulty, but with increasing information flow, the lower the response speed of the network. A fault in a locked station can leave the network, but a failure in a communication channel will leave fully locked, making it difficult to locate the fault. Star network topology Such computer network is the oldest. All workstations are connected directly to the server and all communications necessarily have to be done through it. This method of topology can easily add or remove machines. If a fault occurs in one of the stations have no impact on the overall functioning of the network, but if the server fails, the entire network will collapse. The cost and implementation of such a network of computers is expensive due to the large amount of wiring and the complexity of its structure. Topology star-bus topology are combined in this two types of networks mentioned above. A multiplexer signal occupies the central computer of the star configuration, with specific workstations connected to it, and others connected by bus with multiplexers. This type of network offers advantages in buildings that have working groups separated by large distances. As seen, there are different types of networks to connect computers, workstations, servers and other computing and network elements. Depending on the type of business or company, we find a system or another. Javier Jordan.

Backup And Data Recovery Of Servers

yQue’s Network Backup? Network backup allows the task of data backup multiple computers, run on the network. The administrator who created the task and not the user. In fact, the user can continue working without realizing that the data on your computer have been saved, since the task to run in Windows mode service, in the background without interfering with the user’s job. Backup Network Architecture There are three main elements of a network backup: Server, and Client Coordinator. Program Backup Server is installed on the administrator’s computer and has a graphical interface that lets you create backup tasks, synchronization and restoration. Program Coordinator for backup is installed on any computer on the network must be in view of all customers to run an application and your own. Within time intervals of all clients communicate with the coordinator to confirm that they are accessible to the program backup.El backup is installed on Clients computers of users whose data should be saved.

Running in Windows service mode and have no graphical interface. Clients allows the server connects directly to users’ computers and performs the back up of data from these: Server, Client and Coordinator are compatible with the following operating systems: Windows 2000/XP/2003/Vista. The way it works – the backup program (pcs) Server appeals to the Coordinator on that computer is available at this time on the network. The coordinator makes a list of users’ computers, the Server pcs goes directly to each computer on the network backup and requires a list of directories available on each computer .- The administrator chooses which data on each user’s computer intended for the back up, add this data to the backup list and controls the backup task execution. The administrator can create a separate task for each computer or a single task for all computers. In addition to Network Backup, you can make back up of ODBC databases compatible data MS Exchange Server, Lotus Notes databases, as well as creating the entire disk image on your corporate server.

New PC Equipment

Today we find a common problem when buying a new computer equipment, but this has been exacerbated in laptops, because manufacturers install Windows Vista on a computer that can not handle it, (maybe if you can, but not in optimum conditions) what I meant when we started working on our new team and then have problems with speed, and some other factors such as lack of disk space, or good and in most cases, lack of RAM. In my case, I bought a laptop from the moment that turned on, it seemed somewhat slow, and after I was installing basic software (word processing, instant messaging, etc.) Low speed and low yields that had been decreasing very fast, find the solution in a thousand ways, thinking that something was overloading the software and the reality is not so, but a day walking the streets of the city got a good computer store, go to and the first thing she saw was a RAM for a laptop like the one I had bought, did not hesitate a moment to acquire it, get home, you install the memory, turn it on I take a big surprise, a computer completely renovated, impressive speed . That is why if you find yourself in the same case, do not hesitate or increase a little in RAM memory to your computer. Note: If you have an outdated processor, hard disk free space, or a very old computer, because without doubt the RAM will not help you much.

Security and Confidence Achieved with Alarms

Whether you want to protect your home, business or both, the simple and common procedure for doing this is by installing an alarm. There are a large variety of alarms, available in a large number of price ranges, to fit any budget.

If you are in the market for a burglar alarm for your home of business, it is worthwhile to know a bit about how burglar alarms work. The concept as to how alarms work is quite simple. Think of the alarm as an electric circuit, which has been built into the door to your home. Since electricity can only flow when the circuit is closed, that is when the electricity has a place to flow to, the circuit is considered complete, or closed.

In a closed-circuit alarm system, when the circuit is broken, as for instance when a door is opened which stops the flow of electricity in the circuit, an alarm is sounded. An open-circuit alarm system works the opposite way. In this system, when the door is opened the circuit is completed and the electricity begins to flow, causing the alarm to sound.

A closed-circuit alarm system is a bit more secure because in order to deactivate the open-circuit system, all the burglar needs to do is cut the wire to render the alarm non-functional. The closed circuit system uses a magnet to detect the opening of the door or window, which then opens the circuit with the use of a spring which pulls the circuit open. When the current is cut, a relay is closed and an alarm rings, alerting the homeowner, police or security company that there has been a breech in security.