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3M also discovered that if the refractive index in the horizontal or y direction for layer 1 equals the refractive index in the vertical or z direction for layer 2 (and vice versa), the film shows constant reflectivity from all viewing angles.
Many switches typically provide wire-speed Layer 2 and wire-speed Layer 3 capabilities at a relatively low cost-per-port basis.
Testing Focused on Layer 2 and 3 Service Scalability, Flexibility, Reliability and QoS Support for Advanced Next-Generation Network Deployment
By integrating advanced Layer 2 and Layer 3 switching including IP, IPX, AppleTalk, OSPF, BGP4, multicast and wire-speed input/output Access Control Lists in a compact form factor with hot-swappable power supplies and mini-GBIC interfaces, the FastIron 4802 heralds a new category of stackable switches for enterprises and service providers that combine serviceability and scalability of high-end modular switches with the density and price/performance of stackable switches.
Foundry's copper-based FastIron II Plus GC topped our price/performance charts in the Layer 2 modular/chassis-based category and captured first place in Layer 3 IP and Layer 3 IPX ratings," stated Charlie Bruno and Kevin Tolly of Network World and The Tolly Group, respectively.
Wiring closet switches that have traditionally only supported Layer 2 will now need to support multi-layer (Layer 2, 3, 4 and beyond) services -- such as traffic classification, protocol filtering, and multicast --- in order to handle and prioritize different types of traffic and deliver QoS to the network edge," said Esmeralda Silva, Senior Analyst for International Data Corporation (IDC).
o Full wire speed, no effect, on Layer 2 performance