Diploma in Information Technology Principles of Information Systems and Data Management Classroom...
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Transcript of Diploma in Information Technology Principles of Information Systems and Data Management Classroom...
![Page 1: Diploma in Information Technology Principles of Information Systems and Data Management Classroom Local Area Network & Internet.](https://reader036.fdocuments.in/reader036/viewer/2022062304/56649d9c5503460f94a852ff/html5/thumbnails/1.jpg)
Diploma in Information Technology
Principles of Information Systems and Data Management
Classroom Local Area Network &
Internet
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Network Diagrams
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Components
• Firewall• Router• Core Switch• Distribution Switch• Access Switch• Cables
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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.
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Firewall
CISCO ASA 5510 BUN - K9 Series
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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.
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Router
CISCO 2911
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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.
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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.
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Core & Distribution Switch
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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.
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Access Switch
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Cables
• RJ45 & Fiber
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Reference
• http://www.ciscoguard.com/ASA-5510.asp• http://www.cisco.com/en/US/products/index.
html• http://compnetworking.about.com/cs/lanvlan
wan/g/bldef_lan.htm• http://searchnetworking.techtarget.com/
definition/local-area-network-LAN