Every network device has a life cycle: planning and procurement, deployment, operation and maintenance, and finally retirement. Managing it deliberately keeps the network secure and supported, spreads costs predictably across budgets, and avoids nasty surprises when an old device fails and no replacement, patch or support is available. Life-cycle management connects closely to the asset inventory, change management and security, and Network+ tests it mainly through scenarios about unsupported devices, upgrades and disposal.
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