CCNA Data CenterFunctions of Networking
» Networks are comprised of devices and endsystems, such as Hosts and Servers that areconnected enabling them to communicatewith each other.
What is a Network?
Example Network
» PCs/MACs» Network Interface Cards (NICs)» Switches» Routers
Physical Components of a Network
Sample Network Diagram
» Applications – Email, DB, UC, File/Web Services» Printing resources» Network Storage – NAS (CIFS/NFS) or SAN» Backup Devices – Tape or Network
Sharing of Resources
» Batch applications • FTP, TFTP, inventory updates (no direct interaction) • Bandwidth is required, but not critical» Interactive Applications • DB updates or Inventory queries (Human to
machine interaction) • Response time is important, but not critical» Real-time Applications • Voice and Video (Human to machine interaction) • Latency is critical
Application Interactions
» Availability – Measure of uptime» Scalability – Growth potential» Reliability – MTTR or MTBF» Security – Built-in protections» Speed – Data rates» Cost – CapEx and OpEx
Network Characteristics
Network Topologies
Wireless Topology