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Networking Chapter 12

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  • 1. Advanced Networking Devices Chapter 12
  • 2. Objectives• Discuss the four logical topologies as defined by CompTIA• Configure and deploy VLANs• Implement advanced switch features
  • 3. • Home Routers-Really two devices in one – Four-port switch – Router• The combination is more than the individual parts. The home router becomes an advanced device. Works at multiple layers of the OSI seven-layer model
  • 4. • Logical Network Topologies goes beyond the description of either physical or signaling topologies – Another term (beyond CompTIA) is “software architecture model” – Terms refer to the role computers play in a network • Which computers act as servers • Which computers act as clients
  • 5. • Client/Server – Earliest networks used this model – Certain systems acted as “dedicated” servers • iDedicated means serving was all they did • Offered up files, folders, Web pages, etc – Client systems never functioned as servers • Clients could only see the server • Clients could not see other clients • Could only share data with each other by sharing on the server
  • 6. • Peer-to-Peer – Microsoft’s first versions of network-capable Windows introduced this model – Any system acts as a server, a client, or both – Depends on configuration – PCs tend to be configured as both clients and servers
  • 7. • Client/Server and Peer-to-Peer Today – Peer-to-peer has been adopted by every modern operating system • Windows • Linux • Macintosh• Newer implementations offer more robust security – User accounts – More advanced permissions – CompTIA tests on classic client/server and peer-to-peer
  • 8. • VPN – Originally remote connections were very expensive – Telephone connections for single system connection to a LAN – Dedicated private connections (also from the phone companies) to connect LAN to LAN.
  • 9. • VLAN – Virtual Local Area Network (VLAN) – Used by all but smallest LANs – Remote incoming connections – Public Web or e-mail servers – Wireless networks – String of connected switches – Tremendous amount of traffic – Security issues
  • 10. • Trunking – Process of transferring VLAN data between two or more switches – Port on each switch configured as a trunk port
  • 11. • Quality of service (QoS) – Controls bandwidth use for certain devices and applications – Rules-based polices prioritize traffic • Control bandwidth to specific – Protocol – PC – VLAN – IP address