Chapter 1

Part A: Computing and network features

Computing skills

Last updated November 20266 sectionsabout 8 min read

Key takeaways

Data is raw, unprocessed facts with no context; information is data processed into a meaningful, useful form.
A standalone computer processes data for one user; a networked computer processes and shares it for many, which is the whole reason networks exist.
Networked computers give faster communication, shared files and hardware, centralised data management and backup, remote access, and cost savings from shared resources.
Networking equipment is often live and shared, so power down, discharge static, label cables and ports, and schedule disruptive work with notice: a mistake is felt by every connected user.
A NIC is the hardware that connects a computer to the network and carries its MAC address; a driver is the software that lets the operating system use it, and a business need is met by pairing hardware with software.

This paper builds directly on Introduction to Computing System's foundations, now applied specifically to the hardware, software and skills a network carries data between. Before designing or troubleshooting a network, a technician must be fluent in the basic vocabulary of processing, sharing, and the hardware and software each device brings to the network.

Key terms

Processing

A computer executing instructions on data to produce a result, the core activity every device on a network performs on the data it sends and receives.

Computer

An electronic device that accepts data, processes it, and produces information as output.

Information

Data that has been processed into a meaningful, useful form.

Data

Raw, unprocessed facts and figures with no context on their own.

Sharing

Making data or resources accessible to other users or systems, the whole reason networks exist. A standalone computer processes data for one user; a networked computer processes and shares it for many.

Benefits of using computers on a network

Faster and more direct communication between users, by email, messaging and shared calendars, than passing physical documents
Shared access to files and hardware (printers, scanners, storage), so expensive resources need not be duplicated at every desk
Centralised data management, backup and security, applied once at the server rather than separately on every machine
Remote access to resources, letting a user reach their files and applications from a different location or device
Cost savings from resource sharing and centralised administration, offsetting the cost of the network infrastructure itself

Computer safety precautions

Working on networking hardware carries the same electrical and static risks as any computer hardware work, with one addition: networking equipment is often live and shared by many users, so a mistake affects more than one desk.

Power down and unplug equipment before opening a case or working inside a switch or patch panel
Discharge static electricity (an anti-static wrist strap, touching bare chassis metal) before touching internal components, since a network card or switch port is as vulnerable to static damage as any other circuit board
Follow electrical safety practices around networking hardware and cabling: no wet hands near live equipment, cables routed away from foot traffic and heat sources, and rack equipment properly earthed
Schedule work that will interrupt shared equipment (a switch, a server) outside working hours or with advance notice, since a mistake there is felt by every connected user at once
Label cables and ports before disconnecting anything in a shared cabinet, so a change can be reversed correctly if it causes a problem

Computer hardware relevant to networking

Ports

Physical connection points on a device: Ethernet (RJ45), USB, and the specialised console port on network equipment used for initial configuration. A device's number and type of ports decide what it can physically connect to.

Cables

The physical medium carrying signals between devices, covered fully in the chapter on network features: twisted pair, fibre optic and, rarely now, coaxial.

Network card (NIC)

The hardware component that connects a computer to a network, converting the computer's internal data into signals suitable for the cable or radio medium, and carrying the device's own MAC address.

Peripheral devices

Input/output devices connected to a computer, some of which, a network printer or a network-attached scanner, are themselves network resources reachable by other devices rather than only by the one they are plugged into.

Computer software relevant to networking

Operating system

Manages the computer and, in a network operating system, additionally coordinates network resources, user accounts and security policy across many machines (the subject of Network Operating Systems).

Networking software

Applications and services specifically for managing and using network connections: a VPN client, network monitoring software, remote-desktop tools.

Drivers

Software that lets the operating system communicate with a specific hardware device, including the NIC; without the correct driver a network card is physically present but unusable.

Application areas of computers in a networked context

File and resource sharing: shared drives, shared printers and scanners across a department
Communication: email, instant messaging, video conferencing between networked users
Centralised data storage and backup: a file server or backup server serving many client machines
Remote access and administration: a technician managing a server from another location, a user reaching the office network from home

Matching a business need to the hardware and software that serve it
A small college wants every lecturer to print to one shared printer, back up their files automatically overnight, and access the timetable system from home.
Shared printing needs a network printer (or a printer shared from a server) reachable over the LAN, and each lecturer's computer needs the correct printer driver installed, an example of hardware (the printer, the network) and software (the driver) working together.
Automatic overnight backup needs a file server with sufficient storage, backup software scheduled to run overnight, and network capacity to carry that traffic without slowing daytime work.
Home access to the timetable system needs remote-access networking software (a VPN or a web-based portal) and, on the server side, an operating system configured to accept and secure that remote connection.
None of the three needs is met by a single item: each pairs specific hardware with specific software, which is exactly the distinction this chapter draws.

Self-check

(a) Distinguish data from information and give an example of each in a school context. (2 marks)

(b) State four benefits of using computers on a network rather than as standalone machines. (4 marks)

(d) Distinguish a NIC from a driver, and explain why a computer with a NIC installed but no driver still cannot reach the network. (3 marks)

(e) Give one example of a networked application in each of the four application areas: file sharing, communication, centralised storage, remote access. (4 marks)

Show worked answer

(a) Data is raw, unprocessed facts with no context, for example a list of individual test scores. Information is data processed into a meaningful form, for example the class average and the list of students who need extra support.

(b) Faster communication; shared access to files and hardware; centralised data management and backup; remote access to resources (also cost savings from shared resources). Any four.

(c) Power down and unplug before opening equipment; discharge static electricity before touching internal components; follow electrical safety practices around cabling; schedule disruptive work outside working hours or with notice; label cables and ports before disconnecting them. Any four.

(d) A NIC is the hardware component that connects a computer to the network and carries its MAC address. A driver is the software that lets the operating system communicate with that hardware. Without the driver, the operating system cannot use the NIC even though it is physically present, so the computer still cannot reach the network.

(e) File sharing: a shared departmental drive. Communication: email or instant messaging. Centralised storage: a backup server holding every user's files. Remote access: a lecturer accessing the timetable system from home over a VPN.

Exam tip

This chapter is the bridge from general computing literacy to networking specifically; expect exam questions to test whether you can identify which hardware or software component (NIC, driver, networking software) plays which specific networking role, and to justify a choice against a stated business need rather than just define terms in isolation.