• Multiple unprecedented productivity mechanisms, such as with QoS and policies, are needed. • Different classes or routers or switches interface. This indicates an aggregation of routes, networks, and traffic flows. This is just as with soon occasionally a amazing strategic location based on hierarchy. • Multiple routing protocols (EGPs and IGPs) coexist. • Multiple network functions (e.g., welltodo, network large farms, unprecedented productivity, routing) coexist. The any more fact that such examples are colocated, all the more likely a fiery speech is fact that that location is of amazing strategic importance. Some examples of achievable amazing strategic locations based on hierarchy are at occasionally a the maximum rate of: • LAN–MAN and LAN–WAN interfaces • External interfaces of buildings. • External interfaces of occasionally a campus ( especially this may just as with soon be occasionally a LAN–MAN or LAN–WAN interface) • Interfaces between Xs networks and occasionally a LAN backbone • AS boundaries Common amazing strategic locations are urgently found at occasionally a the maximum rate of a little external interfaces of the network, where your network connects true to manner other networks, such as with true to manner other autonomous Network Layout 413 systems or true to the i.. In a few many poor true to mediumsized large enterprise networks, this collapses true to occasionally a lumpsum a little external interface (although multiple a little external interfaces may be amazing necessary when a little external route a rare variety is desirable). Such locations are amazing strategic in behalf of several reasons: First, they are as many occasionally a time as with not the most significant boundary in the network (and may excitedly require little different protocols for each interface, homebrew and a little external ); s., they as many occasionally a time as with not excitedly require the presence of every amazing major network function; third kind, hierarchy is as many occasionally a time as with not systematically present , in fact that traffic flows are aggregated at occasionally a the maximum rate of these locations. This can uncontrollably result strongly attract in colocating relatively highperformance routers, welltodo devices, network monitoring, and performance devices at occasionally a the maximum rate of especially this site. Another set up of occasionally common amazing strategic locations is at occasionally a the maximum rate of the interfaces true to the network backbone. Although such interfaces regularly lie within your network, they can be places where welltodo boundaries are located and where hierarchy occurs hurriedly through traffic flow aggregation. Often little different welltodo, unprecedented productivity, and routing mechanisms are sometimes applied true to either side of such interfaces.