[tag=IN | lemma=requirement | lemma=□ | □]
[tag=IN | lemma=requirement | lemma=in | □]
[tag=IN | lemma=requirement | lemma=requirement | □]
Eases network administration by allowing users to be logically grouped together , regardless of physical interface location , for performance and security considerations ; provides VLAN capability without forcing users to invest in new network technology . No communication is possible between devices in different VSANs except where explicitly allowed through the use of Inter-VSAN Routing . And all PoE ports can supply up to the IEEE standard maximum of 15.4W simultaneously without the need of an external power supply . If a second supply is installed , it operates in a load-sharing capacity . In the rare event that a supervisor module is reset , complete synchronization between the active and standby supervisors ensures stateful failover with no disruptions to traffic . Many of these approaches blur the boundaries between SAN security , best-practice SAN design , and high-availability SAN design , but all are important from the perspective that a correctly configured , secure switch can help prevent both deliberate and unintentional disruptions . Given the bad blood between TMPW and Forbes , it 's hardly a surprise that the article got published without too much of a look at the real facts . Ethernet switching technology is the foundation upon which many of these services are built . Devices in between the source and destination chassis can be any device capable of forwarding IP packets . Because the SPAN feature effectively allows one to take a copy of any Fibre Channel frames being switched inside the switch , this may be considered a security risk given sensitive data that previously could not be snooped can now be captured . A critical ability of any director-class Fibre Channel switch is the ability to load and activate new software on the switch without disrupting traffic across the SAN . Significant attrition problems in critical account and product management roles have left customers to fend for themselves against a failing software development operation that has no embedded recruiting expertise . This optimizes traffic prioritization and network availability without the challenge of a complex configuration . The approach of securing storage islands cannot always be guaranteed in enterprise-wide fabrics . Using the 802.1x standard and the Cisco Secure Access Control Server ( ACS ) , users can be assigned a VLAN upon authentication , regardless of where they connect to the network . This model is engineered for high performance server clusters typically found in high performance computing centers . At this point the attacker controls the server in the data center and from this server can get access to other machines that store sensitive data ( trust exploitation ) or install attacking tools to carry other attacks from inside the server farm . Upon switchover , the data plane will continue to forward packets while the control plane alerts its neighbors of the switchover by issuing an NSF graceful restart to " NSF aware " neighbors . Each firm in our business experienced a round ( or two or four ) of cutbacks , downsizings and wrenching changes in atmosphere . Students told us they complete their schoolwork more quickly ; they are less likely to get stymied by material they do n't understand ; their papers and projects are more likely to draw upon up-to-date sources and state-of-the-art knowledge ; and , they are better at juggling their school assignments and extracurricular activities when they use the Internet .