NETWORK COMPONENTS Flashcards
ROUTERS
A Router forwards data between IP addresses, they are commonly used to route a connection between the ISP and the client. When webpages are requested the request is forwarded from the route externally and then when the web packages are receive the router routes the packet to the correct device on the network
ACCESS POINTS
An Access point is used on a network to distribute network access to users
GATEWAYS
A Gateway is used to connect networks that are operating on different protocols or architecture.
SWITCHES
A Switch is used to direct data to its destination, networks contain many switches and data is passed through switch to switch until it reaches its destination.
HUBS
Hubs provide a connection between multiple devices, hubs are not used as much as they used to be, since a hub do not manage the data that flows through it, it simply distributes it to all its outputs. Instead switches are now used more frequently, a switch does manage the data that passes through and directs it to its next location. Generally switches are more secure than hubs.
BRIDGES
A Bridge is used to change the medium of transfer, for example in school network Cat5 copper cables are used inside building and optical cables are used to transfer data between buildings, Bridges are used to link the copper cables to the optical cables.
WORKSTATIONS
A Workstation is a computer connected to the network
NODES
A Node is any device connected to a network
ISP
An ISP or Internet Service Provider provides users with a connection to the internet.
SERVERS
A server is a large powerful computer that is used to manage devices and data flow on a network. It provides a connection to share resources and allows efficient device management such as updating all computers on the network.
PROXY SERVERS
A Proxy server is like a normal server but has the additional feature of managing the data between the LAN and the WAN, the Local Area/Internal network and a Wide Area/External network such as the Internet. The Proxy serve provides a buffer between the two networks, filtering data and storing data so if many computers on the network requests the same data it can distribute from store rather than requesting the same data multiple times, helping network speed and security.