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Exam questions by topic

Edexcel curriculum (2015)


Algorithms

Application sof'wre​

Ascii

Binary

Cache

Client-Server

Cloud

Compression

Computational think

CPU

Cyber security

Database

Fetch-d-e cycle

Embedded system

Encryption

Environment

Ethics

File size

Flow chart

Hexadecimal

High Level language

ISP/Internet

Law & Legislation

Logic

Magnetic HDD

Networking

Open source

Operating system

Optical storage

Peer to peer

Pictures (data rep)

Protocols

Run length encoding

RAM

ROM

Simulation software

Solid state HD

Sound

Stored program

Utility Sof'wre

Ethernet

Picture
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

Picture
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

Picture
Answer
​D - Eavesdropping

HTTPS

Picture
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

Picture
Answer
​B - SMTP

Picture
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)?



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  • Exam boards
    • OCR past papers >
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