1.3(a) Networks and Topologies

Interface Card. Hardware that a device to a network. Can be wired and/or wireless. Assigned a MAC address.

Connects a network to another network. For example, connects a to the (WAN)

Connects devices on a . Uses the address to route data to the correct connected device.

Wireless Access . Allows a Wi-Fi device to to a network.

Local Area Network. A network over a geographical area. is owned by the network owner.

Wide Area Network. A collection of computers on the network which are spread out over a geographic area. Infrastructure is hired from 3rd party companies who own and manage it.

A that makes to a server for data and connections

A type of network. A client makes to the server for data and connections. management of the network.

Domain Name System. URL is sent to the Domain Name . URL is into the corresponding IP address. IP address sent back to the user's . An error is returned if the IP address cannot be found.

Websites stored on dedicated . Public can the webpages using a web browser.

Each device is connected to every other device, either directly ( Mesh) or partially ( Mesh). More than one route to the destination so very robust. No need to buy switch. Large number of connections is and less secure

A type of network where all computers on the network are computers share their own files with each other each computer is for its own security and backup.

A network where each device is connected to a central . Easy to new devices and transmission is centralised so fewer data collisions. However, single point of failure.

Remote servers that store data that can be accessed over the . High capacity of storage and it can be cheaper than buying a server/secondary storage. However, need internet access, may be slower to access, may be secure and may need to subscription.

A computer that the webpages and files that can be requested by users on the . Uses HTTP/HTTPS to send the files to the user.

How much data can be transmitted at . More bandwidth means network/transmission…because more data is transferred simultaneously/per second

Factor that affects performance of the network. More users means transmission because more data is transferred simultaneously and each user is the bandwidth. More collisions also affects the performance

Factor that affects the performance of a network. A higher error rate means performance as data packets must be re-sent. This down the overall transmission.

The physical media over which data is transmitted. Choice affects the performance of a network. Examples include: , Fibre Optic, Wi-Fi and Bluetooth. Different media have different levels of , transmission speeds, error rate and latency.

Factor that affects the performance of a network. It is the measure of between sending and receiving the data. Higher the latency the the performance.

A network of networks. Uses routers to transmit of data.