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Recent enhancements in IOS now allow the Multicast Rendezvous Point ( RP ) to inspect PIM Register commands from Multicast sources in order to determine their authenticity . Security enhancements are gained by utilizing firewalls between the tiers . Like other acquisition disciplines , the most valuable assets can only be purchased through diligent negotiation and the pursuit of win-win outcomes . It 's well worth reading up on Google 's various initiatives as it displaced the " first-mover " incumbents . Redirection of a packet after a link failure using a routing protocol results in faster failover than a solution that uses Layer 2 spanning-tree enhancements . The Cisco Catalyst 3560 Series is equipped with a robust set of features that allow for network scalability and higher availability through IP routing as well as a complete suite of Spanning Tree Protocol enhancements aimed to maximize availability in a Layer 2 network . In other words , the network scientists are making a solid case that network structure and the quantifiable , predictable behavior associated with it , is a way of looking at things that is as powerful as biology , chemistry or physics . Using the routing table that Cisco IOS Software builds to define configured interfaces and routing protocols , the Cisco Express Forwarding architecture creates Cisco Express Forwarding tables and downloads them into the hardware forwarding engine before any user traffic is sent through the switch . Within 3 years , the pressure will be strong enough to raise the risks associated with new strategic initiatives for most companies . Indeed , more than a third of the Internet-inspired initiatives went out with a whimper during the protracted economic downturn . The Cisco Catalyst 2960 Series is equipped with a large set of features that allow for network scalability and higher availability through multicast filtering as well as a complete suite of Spanning Tree Protocol enhancements aimed to maximize availability in a Layer 2 network .