Edexcel curriculum (2015)
AlgorithmsApplication sof'wreAsciiBinaryCacheClient-ServerCloudCompressionComputational thinkCPUCyber securityDatabaseFetch-d-e cycleEmbedded systemEncryptionEnvironmentEthicsFile sizeFlow chartHexadecimalHigh Level languageISP/InternetLaw & LegislationLogicMagnetic HDDNetworkingOpen sourceOperating systemOptical storagePeer to peerPictures (data rep)ProtocolsRun length encodingRAMROMSimulation softwareSolid state HDSoundStored programUtility Sof'wre |
Ethernet
Answer
Ethernet protocols define standards for network cabling / types of cabling used at the physical layer (1) and corresponding transmission speeds. (1) At the data link layer Ethernet protocols describe how network devices can format data for transmission (1) using frames / packets. (1)? HTTP
Answer
HTTP provides the set of rules / mutual understanding / defines how messages are formatted and transmitted (1) that enables the exchange of data between a client / browser and a web server. (1)? HTTPS
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D - Eavesdropping HTTPS
Answer
When a client / your browser connects to a website via HTTPS the browser and web server send each other unique codes which are used to encrypt any transmitted data / the data is encrypted before transmission. (1) If the data is intercepted by a third party / hacker it will not have any meaning. It can only be read / decrypted using the unique decryption key provided. (1)? SMTP
Answer
B - SMTP 
Answer
Each layer of the TCP/IP model prepares data for transmission from one computer to another. (1) Data is sent downwards from the application (application layer) (1) through protocol stack to the physical media (physical layer). (1) At each stage information is added to the packet such as destination address, source address, protocol, routing information, error correction. (1) At the receiving computer the packet passes through the layers in reverse. (1) ?There are four layers in a simple TCP/IP model (Application layer, Transport layer, Network layer, Data link layer). (1)? |