H19-401_V2.0 Exam Dumps - HCSP-Presales-Campus Network Planning and Design V2.0

While encryption (IPsec) is important, the "Intelligence" in SD-WAN comes from Application-based Routing . To perform Intelligent Traffic Steering , the gateway must identify traffic not just by IP/Port (L3/L4), but by the actual application (L7), such as distinguishing between Office 365 and YouTube. This requires DPI (Deep Packet Inspection) and complex signature matching, which is significantly more CPU and memory intensive than traditional destination-based routing, thus necessitating high-specification hardware.

iStack (Intelligent Stack) is a horizontal virtualization technology used primarily at the access and aggregation layers of the campus network. It allows multiple physical switches to be connected via stack cables and managed as a single logical device with a unified management IP and configuration file. This eliminates the need for complex protocols like STP (Spanning Tree Protocol) to prevent loops, as the links between the stack and the upstream devices are treated as a single inter-device Eth-Trunk.