What is a gateway,what is a modem,what is a server,what is a switch..?
What is a server?
A server is a special computer that has specific roles which it completes over and over again. They are most useful in a situation where you have a network of many computers which access the same files repeatedly. Servers are used for various functions but the most common ones ire to store those files that are used more often by many computers in the network and also in regulating internet traffic among the computers using this specific network. Servers make it possible for many computers in the same network to access the same hardware device like a scanner and a printer.
What is a gateway?
Gateways are devices which play a very important role in multi-network communications. They are devices that will help you route different networks that may be using separate protocols. A gateway device is used when one is setting IP or TCP settings which facilitate routing from one network to the other. They serve a very important role when you are connecting to the internet.
When setting up the gateway device, one is required to have a router or other hardware devices. A computer that has virtual gateway software installed can also be used to set up the gateway device. A gateway is configured to operate at any level of OSI model.OSI model is a model through which information moves around the network. While in use, a gateway device will maintain the same network ID just like all the other devices using the same network.
What is a modem?
A modem is a device that allows your computer to connect to another computer through your phone. Modems are very common devices which are used to connect to the internet. They are cheap in most parts of the world and very popular among those people who cannot afford to set up other forms of internet connections. There are people who consider modems to be inefficient as one modem cannot be used by more than one computer. That means that if there is more than one person in the house who needs to use a modem to connect to the internet, then you will need to have more than one modem.
There are different types of modems in the market. Those that are able to connect to the internet very fast will be more expensive than the slow connecting ones. In order to be able to use a modem, you will need to use a phone line which is supported by local telephone networks. The modem is connected to the computer via the USB port.
What is a switch?
A switch is a device which is used to direct the flow of information between different computers to the Wide Area Network or to the local Area Network. Servers will transfer information from Data Link Layer on the Open Systems Interconnection and then passes commands to Physical layer. A switch is built with multiple ports at the back through which different computers can connect via Ethernet cables. By using a switch, different computers can receive and send data without the risk of these data packets interfering or colliding with each other.