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Diploma in Information Technology

This guide explores essential components of information systems and data management, focusing on key networking elements including firewalls, routers, core switches, distribution switches, and access switches. Learn how each device functions within local area networks (LANs) and the internet, understanding how firewalls protect your network by filtering unwanted traffic. This comprehensive overview also discusses the significance of cable types like RJ45 and fiber optics. Ideal for IT students and professionals looking to deepen their understanding of network architecture.

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Diploma in Information Technology

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  1. Diploma in Information Technology Principles of Information Systems and Data Management Classroom Local Area Network & Internet

  2. Network Diagrams

  3. Components • Firewall • Router • Core Switch • Distribution Switch • Access Switch • Cables

  4. Firewall • is simply a program or hardware device that filters the information coming through the Internet connection into your private network or computer system. • If an incoming packet of information is flagged by the filters, it is not allowed through.

  5. Firewall CISCO ASA 5510 BUN - K9 Series

  6. Router • A device that forwards data packets along networks. • is connected to at least two networks, commonly two LANs or WANs or a LAN and its ISP.

  7. Router CISCO 2911

  8. Core Switch • This layer is considered the backbone of the network and includes the high-end switches and high-speed cables such as fiber cables. • This layer of the network does not route traffic at the LAN. In addition, no packet manipulation is done by devices in this layer. • Rather, this layer is concerned with speed and ensures reliable delivery of packets.

  9. Distribution Switch • This layer includes LAN-based routers and layer 3 switches. • This layer ensures that packets are properly routed between subnets and VLANs in your enterprise. • This layer is also called the Workgroup layer.

  10. Core & Distribution Switch

  11. Access Switch • This layer includes hubs and switches. • This layer is also called the desktop layer because it focuses on connecting client nodes, such as workstations to the network. • This layer ensures that packets are delivered to end user computers.

  12. Access Switch

  13. Cables • RJ45 & Fiber

  14. Reference • http://www.ciscoguard.com/ASA-5510.asp • http://www.cisco.com/en/US/products/index.html • http://compnetworking.about.com/cs/lanvlanwan/g/bldef_lan.htm • http://searchnetworking.techtarget.com/definition/local-area-network-LAN

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