Cisco Discovery Designing and Supporting Computer Networks
This unit covers designing, implementing, and maintaining a prototype network. Learners will apply Cisco networking principles to create a functional network infrastructure.
Assessment criteria
Topic Overview
The City & Guilds Level 2 Diploma in ICT Systems and Principles for IT Professionals is a comprehensive vocational qualification designed to equip students with the fundamental knowledge and practical skills required for a career in IT. This diploma covers a wide range of topics including computer hardware, software, networking, database systems, and cybersecurity. It is structured to provide a solid foundation for further study or entry-level roles in IT support, technical services, or systems administration.
This qualification is particularly valuable because it balances theoretical understanding with hands-on application. Students learn how computer systems operate, how to install and configure hardware and software, and how to troubleshoot common issues. The course also introduces essential concepts in data management and network security, preparing students for the demands of the modern IT workplace. By completing this diploma, students demonstrate competence in core ICT areas that are highly sought after by employers.
Within the broader subject of Computer Science, this diploma serves as a practical counterpart to more theoretical qualifications. It focuses on the 'how' and 'why' of ICT systems, enabling students to apply their knowledge in real-world scenarios. This makes it an excellent choice for those who prefer a hands-on approach to learning and wish to develop job-ready skills from the outset.
Key Concepts
Core ideas you must understand for this topic
- →Computer hardware components: Understand the function of CPU, RAM, storage devices, motherboard, and power supply, and how they interact within a system.
- →Software installation and configuration: Learn to install operating systems (e.g., Windows, Linux) and application software, manage user accounts, and configure system settings.
- →Networking fundamentals: Grasp the basics of network topologies, IP addressing, protocols (TCP/IP, HTTP, FTP), and how devices communicate over a network.
- →Database concepts: Understand relational databases, tables, queries, and the use of SQL to retrieve and manipulate data.
- →Cybersecurity principles: Know common threats (malware, phishing), security measures (firewalls, encryption), and best practices for protecting data and systems.
Learning Objectives
What you need to know and understand
- Be able to design a network infrastructure, Be able to implement a prototype network, Be able to maintain a prototype network
- Be able to design a network infrastructure, Be able to implement a prototype network, Be able to maintain a prototype network
- Be able to design a network infrastructure, Be able to implement a prototype network, Be able to maintain a prototype network
- Be able to design a network infrastructure, Be able to implement a prototype network, Be able to maintain a prototype network
- Be able to design a network infrastructure, Be able to implement a prototype network, Be able to maintain a prototype network
- Be able to design a network infrastructure, Be able to implement a prototype network, Be able to maintain a prototype network
- Be able to design a network infrastructure, Be able to implement a prototype network, Be able to maintain a prototype network
Assessment Criteria
Key criteria assessors look for in your portfolio
- Designs a network that meets given specifications.
- Implements a prototype network correctly.
- Tests and documents network functionality.
- Performs maintenance tasks to ensure network reliability.
- Design a network topology that meets given requirements.
- Configure routers, switches, and other network devices.
- Test network connectivity and performance against specifications.
- Document network design and configuration changes.
- Award credit for producing a comprehensive design document that includes network topology, IP addressing scheme, and hardware selection aligned with specified business requirements.
- Assess credit when the learner correctly configures core networking devices (routers, switches) in the prototype, demonstrating connectivity and basic security measures.
- Expect evidence of systematic testing procedures, including verification of end-to-end connectivity and documentation of test results against design objectives.
- Recognise effective maintenance tasks such as performing firmware upgrades, monitoring network performance using appropriate tools, and implementing configuration backups.
- Award marks for demonstrating a structured troubleshooting methodology to resolve connectivity or performance issues, supported by log analysis and diagnostic commands.
- Design a network infrastructure to meet requirements.
- Implement a prototype network using Cisco devices.
- Maintain and troubleshoot the prototype network.
- Document the network design and configuration.
- Test network functionality and performance.
- Design a network infrastructure meeting specified requirements.
- Implement a prototype network correctly.
- Maintain a prototype network to ensure reliability.
- Document the design and implementation process.
- Troubleshoot common network issues.
- Design a network topology based on requirements.
- Select appropriate hardware and software.
- Implement a prototype network (cabling, configuration).
- Test network functionality and performance.
- Maintain and document the network.
- Designs a network that meets specified requirements.
- Implements a prototype network using appropriate devices.
- Configures network protocols and services correctly.
- Tests and troubleshoots the network effectively.
- Documents the network design and maintenance procedures.
Assessment Guidance
Guidance for achieving higher grades
- 💡Use simulation tools like Packet Tracer for practice.
- 💡Always verify configurations with show commands.
- 💡Document each step of the design and implementation.
- 💡Practice subnetting and VLSM calculations.
- 💡Learn basic Cisco IOS commands for configuration.
- 💡Understand OSI model layers and their functions.
- 💡Always cross-reference your network design against the given business requirements and emphasise how your choices meet those needs in your assignment narrative.
- 💡When implementing a prototype, practice common Cisco IOS commands beforehand and use a lab environment to build confidence with device configuration and troubleshooting.
- 💡For maintenance tasks, adopt a methodical approach: gather symptoms, isolate the issue, formulate a hypothesis, implement the solution, and document the outcome—this demonstrates professional competency to assessors.
- 💡In your submitted evidence, include clear screenshots or logs of successful connectivity tests and troubleshooting steps, as this provides tangible proof of your skills.
- 💡Practice subnetting and VLAN configuration.
- 💡Use simulation tools like Packet Tracer.
- 💡Always back up configurations before changes.
- 💡Use network diagrams to illustrate your design.
- 💡Follow a systematic approach to implementation.
- 💡Keep a log of maintenance activities.
- 💡Practice using Cisco Packet Tracer or similar.
- 💡Learn basic router and switch configuration commands.
- 💡Understand the OSI model and TCP/IP stack.
- 💡Use network simulation tools to practice.
- 💡Follow a systematic troubleshooting approach.
- 💡Document every step for assessment evidence.
- 💡When answering questions about hardware, always use specific technical terms (e.g., 'DDR4 RAM' instead of just 'memory') and explain the function clearly. This shows depth of knowledge.
- 💡For networking questions, draw diagrams if possible. Even in written answers, describing the flow of data (e.g., 'client sends HTTP request to server via TCP/IP') can earn you marks for clarity.
- 💡In database questions, always write SQL statements with correct syntax and use meaningful table/column names. Practice writing queries for different scenarios (e.g., JOINs, WHERE clauses) to avoid common errors.
Common Mistakes
Common errors to avoid in your coursework
- Overlooking IP addressing and subnetting requirements.
- Failing to test connectivity after implementation.
- Neglecting documentation of the network design.
- Incorrect IP addressing or subnetting.
- Failure to implement security measures like VLANs or ACLs.
- Not testing redundancy or failover mechanisms.
- Learners often neglect to consider future scalability and redundancy in the design, leading to a network that cannot easily adapt to growth.
- A frequent error is incorrect subnetting, resulting in overlapping IP ranges or insufficient addresses for required hosts.
- Many students fail to document configuration changes and test results comprehensively, which hampers effective maintenance and handover.
- In the prototype phase, candidates sometimes omit essential security configurations such as access control lists or port security, leaving the network vulnerable.
- During maintenance, learners may jump to conclusions without systematically isolating the problem, using inappropriate diagnostic commands or ignoring physical layer checks.
- Incorrect IP addressing or subnetting.
- Poor cable management or labelling.
- Not testing connectivity thoroughly.
- Overlooking security considerations in design.
- Incorrectly configuring network devices.
- Failing to test the prototype thoroughly.
- Incorrect IP addressing or subnetting.
- Poor cable management.
- Failing to test thoroughly.
- Overlooking security considerations in design.
- Incorrect IP addressing or subnetting.
- Failing to test all network functionalities.
- Misconception: RAM and storage are the same thing. Correction: RAM is temporary memory used for active processes, while storage (HDD/SSD) holds data permanently. Mixing them up can lead to incorrect troubleshooting.
- Misconception: A firewall alone guarantees network security. Correction: Firewalls are just one layer; security also requires antivirus software, regular updates, strong passwords, and user awareness.
- Misconception: SQL is only for creating databases. Correction: SQL is primarily used for querying and manipulating data (SELECT, INSERT, UPDATE, DELETE), not just for defining database structures.
Frequently Asked Questions
Common questions students ask about this topic
Pass / Merit / Distinction Evidence Checklist
How your portfolio evidence is graded for CITY & GUILDS LIMITED Cisco Discovery Designing and Supporting Computer Networks
Every vocational unit is marked against named criteria rather than an exam percentage. Your tutor's brief lists the exact codes for this unit — here is what each band is asking you to do.
Demonstrate baseline knowledge, accurate terminology, and core practical application.
Provide detailed analysis, structured explanations, and clear workplace reasoning.
Deliver thorough evaluation, original problem solving, and fully justified recommendations.
Before You Start
Prior knowledge that will help with this topic
- •Basic understanding of computer operation (e.g., using an operating system, file management).
- •Elementary mathematics (e.g., binary numbers, basic arithmetic) for understanding data representation.
- •No prior programming experience is required, but familiarity with logical thinking helps.
Coursework AI Review
Paste your assignment brief and check your draft against its P/M/D criteria
Key Terminology
Essential terms to know
- Be able to design a network infrastructure, Be able to implement a prototype network, Be able to maintain a prototype network
- Be able to design a network infrastructure, Be able to implement a prototype network, Be able to maintain a prototype network
- Be able to design a network infrastructure, Be able to implement a prototype network, Be able to maintain a prototype network
- Be able to design a network infrastructure, Be able to implement a prototype network, Be able to maintain a prototype network
- Be able to design a network infrastructure, Be able to implement a prototype network, Be able to maintain a prototype network
- Be able to design a network infrastructure, Be able to implement a prototype network, Be able to maintain a prototype network
- Be able to design a network infrastructure, Be able to implement a prototype network, Be able to maintain a prototype network
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