Nt1310 Unit 3 CPU Architecture Case Study

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Answer 2)
Shared CPU Architecture.
Architecture of Cisco 7200 Series Router:
The Network processing engine comprises the central memory, the CPU, the Peripheral Component Interconnect memory, while NPE 100 uses dynamic random access memory, and the regulator integrated circuit for the buses.
While performing simultaneous high touch WAN edge facilities, the Network processing Engine supplies wire rate output. Improved by a procedure concentrated microcode engine called Parallel Express Forwarding engine, the fundamental strategy controls NPE 300 technology. A marvelous performance growth for process hungry intellectual network amenities is presented by this exclusive double processing design. The Route and Switch Processor withstands wire speed
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The combined output is 3.2 gigabits per second and it can forward up to 40 Megabits per second for all packet dimensions. It uses a consolidated route lookup engine, common memory and the Packet Forwarding Engine is applied in application explicit integrated circuits.
Usage of ASICs encourages effectual measure of data packets through the system. Packets run over the Packet Forwarding Engine in sequence. First packets reach at a receiving PIC interface. Then the PIC permits the packets to flow to the input and output administrator on the FPC. The input and output administrator checks the packet headers, splits the packets into 64 byte data cells and permits to flow through the cells over the mid plane to the SSB. A Dispersed buffer administrator on the SSB dispenses the data cells through the memory buffers situated on and pooled by all the FPC.
The Internet Processor 2 completes functions on the SSB by a route lookup for every packet then decides in what method to send it. It also notifies the spread buffer administrator on the SSB of the progressing conclusion, and the spread buffer administrator sends the announcement to the FPC that hosts the suitable outbound

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