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OCR GCSE Computing, Networks Exam Questions and Answers Latest Update Graded A+
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OCR GCSE Computing, Networks Exam Questions and Answers Latest Update Graded A+ Topology - Answers Physical structure and layout of a network. Star - Answers Network topology in which all computers are individually connected to a central node. Most common form of network topology. Adv: Disadv: ...

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  • October 12, 2024
  • 5
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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OCR GCSE Computing, Networks Exam Questions and Answers Latest Update Graded A+

Topology - Answers Physical structure and layout of a network.

Star - Answers Network topology in which all computers are individually connected to a central node.
Most common form of network topology.

Adv:

Disadv:

Mesh - Answers Network topology in which all nodes are interconnected. Often used in disaster areas.

Adv: Reliability - all nodes will be able to communicate even with breaks in the cables.

Disadv: expensive and complex to set up and maintain.

Bus - Answers Network topology in which all devices are connected to a single backbone cable. Data
travels in both directions.

Adv: simple to set up

Disadv: slow due to data collisions. Break in cable means network fails.

Protocol - Answers A set of rules used by computers to communicate with each other across a network.

HTTP - Answers Hyper Text Transfer Protocol

Used to request and transmit web pages over the Internet or other computer network.

HTTPS - Answers Hyper Text Transfer Protocol over SSL (Secure Socket Layer)

Data transferred over the Internet is encrypted for security reasons.

POP - Answers Post Office Protocol

Protocol used to retrieve emails from a host and transfer to a client.

Obsolete.

IMAP - Answers Internet Message Access Protocol

Stores email messages on a server but allows end user to view and manipulate messages as if they were
local. Synchronises messages across multiple devices.

SMTP - Answers Simple Mail Transfer Protocol

Protocol to send emails over the Internet

, Bluetooth - Answers Wireless technology standard for exchanging data over short distances, eg
connecting headphones to a device or mobile phone to a car

Ethernet - Answers Family of protocols to govern communication across the Internet.

FTP - Answers File Transfer Protocol

Used to transfer computer files between a client and a server on a computer network.

Four layer model - Answers Conceptual model that organises protocols into different layers:

Application

Transport

Network

Data

Each layer serves the layer above it

Breaks communication into manageable pieces, allowing changes to be made to one layer without
affecting any others. Companies must make compatible hardware and software so brands can work
together.

TCP/IP - Answers Set of protocols which dictate how data is sent over the Internet.

Packet - Answers Small block of data transmitted from one computer to another.

Packet switching - Answers Used by routers to direct packets on the Internet and other IP networks

Checksum - Answers Number used to check if a packet of data has been received correctly.

IP address - Answers Unique identifier given to a device when it accesses and IP network

MAC address - Answers Unique identifier assigned to a device that cannot be changed. Also known as a
physical address.

48 or 64 bit binary numbers presented in hexadecimal. Mainly used by Ethernet protocol on LANs.

IPv4 - Answers Address presented as a 32-bit binary number, translated into four denary numbers, eg

192.32.6.9

IPv6 - Answers Address presented as a 128-bit binary number, translated into 8 hexadecimal numbers

Needed as IPv4 addresses were running out

LAN - Answers Local Area Network

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