Networks(1.3)

• In P2P networks, all devices are EQUAL, connected to every other device (no central location) • Files are stored individually on machines and then share with others • P2P is common when sharing files online, especially when video streaming e.g. Skype

• Cheaper to set up than Client Server network 2. Easier to set up and maintain and no expertise required

• No centralised location (requires manual back-ups and updating of software) • Copying files creates duplicates of files, so harder to keep track of latest versions • Less reliable and data may be lost if one machine fails

• A Client-Server network is managed by one main server, and it is connected to all its devices (clients) • Files and software are stored on the server, instead of individual client machines • Clients send requests for data to the server, and the server processes this and responds (client-server relationship) • Much more common than P2P networks

• Easily perform back up of all stored data • Easier to install and manage software • Easier to manage network security • Central location for all files and data

• Expensive to set up and maintain (required expertise and specialists) • If server fails, then ALL connected devices will stop working

A LAN covers a small geographical location on a single site e.g. school, office, shop, home and can be connected either by wired (using Ethernet) or wireless (using WIFI) connections

• A WAN connects multiple LANs spread across multiple geographical locations • WANs are connected by using copper or fibre optic cabling

• A device that creates a wireless LAN which other devices can connect to

• A device which transmits the data between multiple networks (at least 2 networks) • allows connection from a LAN to the internet

• A device which connects other devices on a LAN - they receive data from one device and transmit to another device, with the correct MAC address

• An internal component that allows a device to connect to a network

• Made up of 4 pairs of twisted copper wires - mainly used to physically connect devices on a LAN

• Made up of single copper wire surrounded by a plastic layer (insulation) and metal mesh (shielding) • Mainly used by phone companies and internet providers

• Made up of a glass core which refracts light as data travels, over long distances • used for high speed internet and cable TV services

• higher bandwidth means better network performances as more data can be transferred at a given time • More users sharing bandwidth can slow down performances

• Wired connections are more reliable/faster than wireless, but are not as portable and require more cabling to connect more devices

• The more devices connected, the slower the network may perform

• A cloud host stores the data of another organisation, using its own servers, storage and software, accessible only via the internet

• access data from any connected device • easy to increase storage • no need to pay for IT staff • provides auto updates and back-ups

• must need internet access • dependency on the cloud host for security and back-ups • often subscription based so can be more expensive

• a collection of websites hosted on web servers, which we can access using the HTTP protocol

• Each website contains a URL (uniform resource locator) which we can access using the DNS • Translates a websites domain name into its IP address, so we don’t need to remember IP addresses

• Much ore reliable • faster and stable connection (not affected by interference) • less likely to be affected by hacking