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2. Technical support - Wikipedia

   en.wikipedia.org/wiki/Technical_support

   Tier III (or Level 3, abbreviated as T3 or L3) is the highest level of support in a three-tiered technical support model responsible for handling the most difficult or advanced problems. It is synonymous with level 3 support, 3rd line support, back-end support, support line 3, high-end support, and various other headings denoting expert level ...

3. Data center management - Wikipedia

   en.wikipedia.org/wiki/Data_center_management

   Tier 1: Basic help desk – initial point of contact, including software opening a trouble ticket. Information available to its personnel include FAQ and a basic knowledge base. Tier 2: In-depth technical support; Tier 3: Expert product and service support. The extra tiers are: [39] Tier 0: Self help (i.e. by the end user)

4. Data centre tiers - Wikipedia

   en.wikipedia.org/wiki/Data_centre_tiers

   Tier III: full N+1 redundancy of all systems, including power supply and cooling distribution paths Tier IV : as Tier III, but with 2N+1 redundancy of all systems A Tier III system is intended to operate at Tier II resiliency even when under maintenance, and a Tier IV system is intended to operate at Tier III resiliency even when under maintenance.

5. IT service management - Wikipedia

   en.wikipedia.org/wiki/IT_service_management

   A service desk is a primary IT function within the discipline of IT service management (ITSM) as defined by ITIL. It is intended to provide a Single Point of Contact (SPOC) to meet the communication needs of both users and IT staff, [7] and also to satisfy both Customer and IT Provider objectives.

6. Data center network architectures - Wikipedia

   en.wikipedia.org/wiki/Data_center_network...

   The three-tier is the common network architecture used in data centers. [10] However, three-tier architecture is unable to handle the growing demand of cloud computing. [11] The higher layers of the three-tier DCN are highly oversubscribed. [3] Moreover, scalability is another major issue in three-tier DCN.

7. Information technology architecture - Wikipedia

   en.wikipedia.org/wiki/Information_technology...

   Information technology (IT) architecture is the process of development of methodical information technology specifications, models and guidelines, using a variety of information technology notations, for example Unified Modeling Language (UML), within a coherent information technology architecture framework, following formal and informal information technology solution, enterprise, and ...

8. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

9. IT infrastructure - Wikipedia

   en.wikipedia.org/wiki/IT_infrastructure

   A server is a physical component to IT Infrastructure.. Information technology infrastructure is defined broadly as a set of information technology (IT) components that are the foundation of an IT service; typically physical components (computer and networking hardware and facilities), but also various software and network components.