Learn the security architecture and protocols used to keep networks safe in this free online diploma course.
This diploma course introduces you to the architecture and protocols used in network security. We explain the structure and function of local area networks (LANs) and wide area networks (WANs) and examine key devices like hubs, switches and routers. These allow for efficient communication through a network and this course teaches you everything you need to know to keep that data safe from prying eyes, an invaluable skill in the Information Age.
This diploma course discusses the basics of networking and local area networks. We lay out network terminology and explain serial data transfer and internet protocol (IP) addresses as we examine the most common types of network. We study the ‘open systems interconnection’ (OSI) model to illustrate how its layers guide the flow of network traffic. We cover wired and wireless networks and the tools used to manage and troubleshoot them.
Dynamic host configuration protocol (DHCP) is a client/server protocol that enables configured client computers to obtain IP addresses automatically. We outline what information can be obtained from IP addresses using DHCP and the benefits of doing so. We then investigate ‘discovery, offer, request, acknowledge’ (DORA) discovery and ‘automatic private IP addressing’ (APIPA), which is a service for assigning unique IP addresses to small office or home networks without deploying the DHCP service.
Setting up a network can help a business make the most of its computer systems and equipment. It is a fast and reliable way of sharing information and resources. This course provides a deep understanding of the different types of LANs and WANs found in networks and the protocols used to secure communications and preserve network security. This diploma course suits anyone working in the field of information technology so sign up to polish your computer skills and take the next step in your career.
All Alison courses are free to enrol study and complete. To successfully complete this Diploma course and become an Alison Graduate, you need to achieve 80% or higher in each course assessment. Once you have completed this Diploma course, you have the option to acquire an official Diploma, which is a great way to share your achievement with the world.
Your Alison Diploma is:
- Ideal for sharing with potential employers
- Great for your CV, professional social media profiles and job applications.
- An indication of your commitment to continuously learn, upskill & achieve high results.
- An incentive for you to continue empowering yourself through lifelong learning.
Computer networking refers to the practice of connecting multiple computing devices to share resources and information. It enables communication and data exchange between devices and systems. Here are some key aspects and components of computer networking:
- Components:
- Devices: Computers, servers, routers, switches, modems, and other hardware devices.
- Cables and Connections: Ethernet cables, fiber optic cables, wireless connections (Wi-Fi), and other transmission media.
- Software: Operating systems, network protocols (e.g., TCP/IP), and network management tools.
- Types of Networks:
- Local Area Network (LAN): Connects devices within a limited geographical area, such as an office building or campus.
- Wide Area Network (WAN): Spans large geographical areas, often connecting LANs across cities or countries.
- Wireless Networks: Use radio waves or infrared signals to connect devices without physical cables.
- Network Topologies:
- Star Topology: Devices connect to a central hub or switch.
- Bus Topology: Devices connect along a single backbone cable.
- Mesh Topology: Devices are interconnected with multiple paths.
- Ring Topology: Devices are connected in a closed loop.
- Networking Protocols:
- TCP/IP: Transmission Control Protocol/Internet Protocol, the foundation of the Internet and most networks.
- HTTP, HTTPS: Hypertext Transfer Protocol and Secure HTTP, used for web browsing and secure communications.
- FTP: File Transfer Protocol, for transferring files between computers.
- SMTP, POP3, IMAP: Email protocols for sending and receiving emails.
- Network Services and Applications:
- Email: Sending and receiving emails over the network using SMTP, POP3, or IMAP.
- Web Browsing: Accessing websites and resources on the World Wide Web using HTTP or HTTPS.
- File Sharing: Sharing files and documents between users or devices on a network.
- Remote Access: Accessing network resources or devices remotely using VPN (Virtual Private Network) or remote desktop protocols.
- Network Security:
- Firewalls: Protecting networks from unauthorized access and threats.
- Encryption: Securing data transmission and storage using encryption algorithms.
- Access Control: Managing user access to network resources based on permissions and policies.
- Intrusion Detection and Prevention Systems (IDPS): Monitoring network traffic for malicious activity.
- Network Administration and Management:
- Network Configuration: Setting up and configuring network devices and protocols.
- Monitoring: Monitoring network performance, traffic, and security incidents.
- Troubleshooting: Identifying and resolving network issues and connectivity problems.
- Capacity Planning: Estimating future network requirements and scaling network resources accordingly.
Computer networking is essential for businesses, organizations, and individuals to communicate, collaborate, and access resources efficiently and securely in today’s interconnected world. It forms the backbone of modern information technology infrastructure and enables the Internet and many other digital services we rely on daily.
