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picture1_Cisco Ppt 31881 | Lecture13&14


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File: Cisco Ppt 31881 | Lecture13&14
cisco devices cisco s lan switches cisco devices cisco s routers cisco devices hardware components depending on the model series at least mother board back plane cpu risc mips or ...

icon picture PPT Filetype Power Point PPT | Posted on 09 Aug 2022 | 3 years ago
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 Cisco Devices
         Cisco’s LAN Switches
 Cisco Devices
            Cisco’s Routers
 Cisco Devices
           Hardware Components
      Depending on the model/series (at least)
        Mother Board/Back Plane
        CPU (RISC - MIPS or Motorola)
        Memory
        Bus
        I/O interfaces/Modules
  Cisco Devices
                       Memory Components
           Flash  Memory – Holds the IOS; is not 
           erased when the router is reloaded; is an 
           EEPROM            [Electrically        Erasable 
           Programmable          Read-Only        Memory] 
           created by Intel, that can be erased and 
           reprogrammed  repeatedly  through  an 
           application of higher than normal electric 
           voltage
           NVRAM  –  Non-Volatile  RAM  -  holds 
           router  configuration;  is  not  erased  when 
           router is reloaded
           RAM – Holds packet buffers, ARP cache, 
           routing table, software and data structure 
           that allows the router to function; running-
           config  is  stored  in  RAM,  as  well  as  the 
           decompressed IOS in later router models
           ROM – Starts and maintains the router
 Cisco Devices
              What is IOS?
   Internetwork Operating System
    Operating System of all Cisco Devices
    A derivative of BSD UNIX
    Custom built by Cisco for each platform
    Pre-packaged and static. Complete IOS is upgraded.
    Features available in different versions (for a price!)
    GUI’s available, but 90%+ of users still prefer command-
    line configuration.
    IOS is designed to be hardware independent.
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...Cisco devices s lan switches routers hardware components depending on the model series at least mother board back plane cpu risc mips or motorola memory bus i o interfaces modules flash holds ios is not erased when router reloaded an eeprom created by intel that can be and reprogrammed repeatedly through application of higher than normal electric voltage nvram non volatile ram configuration packet buffers arp cache routing table software data structure allows to function running config stored in as well decompressed later models rom starts maintains what internetwork operating system all a derivative bsd unix custom built for each platform pre packaged static complete upgraded features available different versions price gui but users still prefer command line designed independent...

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