Layer 3 switches do routing with ASIC chips. Routers do it with a microprocessor and its associated software. Therefore, the Layer 3 switches are much faster than traditional but cost more. We need them both because in many situations a slow router is sufficient and cheaper than a gigabit layer 3-switch router.

Border Gateway Protocol is the core routing protocol .It works by maintaining a table of IP networks, which designate network reach ability among autonomous systems (AS). It is described as a path vector protocol BGP does not use traditional IGP metrics, but makes routing decisions based on path, network policies, and/or rule sets. BGP replace the EGP routing protocol to allow fully decentralized routing in order to allow the removal of the NSFN et internet backbone network.

HP Open View is a suite of business computer management or "e-services" programs from Hewlett-Packard, which states that the suite is "among the world's 20 largest software businesses". The Open View programs HP 9000 and e3000 business server customers. An HP customer's IT professionals can use Open View to manage applications, device availability, network conditions and status, system performance, service and program maintenance, and storage resources.

NO, we cannot have two DHCP servers in one network, because it provide IP address to the clients. If two servers are supposed to distribute at a time there will be a conflict of the given and reserved IP address between two distribution points.

Virtual LAN's divide one physical network into multiple broadcast domains. However, VLAN-enabled switches cannot by themselves, forward traffic across VLAN boundaries. Therefore, you need to have routing between these VLANs, which is inter-VLAN routing. You can achieve this by using either a Layer 3 switch or a router. Host Portion Borrowed From Network Portion is called SUPERNATING.