Hub and spoke wide area Network topology
Larger Enterprise have multiple business offices in different geographical location. Normally, Internet provides network connectivity solution to connect multiple physical site in different geographical location.
In a hub and spoke site to site wide area network(WAN) network topology one physical site act as hub , while other physical site act as spokes. Spoke sites are network to each other via hub site.
Wide area network links are costly and they always involve a monthly bill payment to internet service provides for connectivity services.
Main disadvantages of hub and spoke wide area network topology is that it may cause communication time lags. Wide area network topology also has redundancy issues. If the main office main offices networks fail, entire enterprise network communication may fail.
NETWORK INFRASTRUCTURE DEVICE AND ICONS
Network infrastructure devices are the physical components , which are used to build the network. Depending on the size of the enterprizes network,the model , capacity and size of network infrastructure devices varies.
It is necessary to understand and perceive these network device icons,because network diagram uses these icons to represent the network devices.
CISCO SECURE ACS