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This comprehensive overview covers virtualization, cloud computing, and IT risk management. It explores topics like elasticity, capex, opex, TCO, cloud service models, data normalization, BI, big data, neural networks, social media, advertising, IT risk management, backups, disaster recovery, and cyber attacks. The document also discusses IT service management frameworks such as ITIL, SLAs, OLAs, service catalogs, KMS, SOPs, CABs, and CMDBs. This guide provides valuable insights for students and professionals interested in modern information systems.
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virtualization - Answer: a way of emulating in software a physical piece of hardware elasticity - Answer: new servers can be built when demand goes down, servers can also be destroyed when demand goes down pooling - Answer: allows for CPU, storage, and networking to be shared between multiple resources capex - Answer: a one time, usually large expenditure ex) buying a new busines
opex - Answer: regular expenses paid at regular intervals at the cost of doing business TCO - Answer: when purchasing a cloud, choosing one needs to evaluate the total cost of owning the hardware Pro's of cloud services - Answer: small capex rapid deployment known cost structure no obsolescence cheaper support Con's of cloud services - Answer: no control over data location less security insight can be more expensive overall heavily reliant on vendor IaaS - Answer: offers general provide services which replace hardware resources SaaS - Answer: provide users with what amount to end use application, but running on hardware not owned by the company PaaS - Answer: can be thought of in forms of content creation, or in terms of its users
ways in which SMIS can be used - Answer: Marketing Customer Service Logistics Manufacturing Human Resources social capital is measured by - Answer: Number of relationships in a network Strength of the relationships Resources controlled by those related pay per click - Answer: generates revenue each time a user clicks on a link to a retailer's website pay per impression - Answer: an advertising pricing model in which advertisers pay based on how many users were served their ads adblockers - Answer: useful for blocking AD's and security KPI (Key Performance Indicator) - Answer: a measure of achievement that can be attributed to an individual, team, or department is there a way to eliminate risk? - Answer: no 4 A's of IT risk - Answer: availability
access accuracy agility replication - Answer: an "in sync" copy of data at a remote location to allow for failover during an outage. This ability to instantly fail over is referred to as HA (High Availabilty) backups - Answer: a discrete copy of data used for restoring during a catastrophic failure or deletion. Deletion of files in a replicated scenario become deleted at both ends, so replication is not a replacement for backups Synchronous replication - Answer: instant, immediate replication, and the data is not considered written until it writes to all nodes required for high availability configurations Asynchronous replication - Answer: replication where the data is considered written when it writes to the primary node, and which synchronizes on the back end either on a time schedule or on a "When it can get to it" method necessary over long distances RTO - Recovery Time Objective - Answer: how much of downtime we can afford as a business
be reversed back to the original state using another algorithm involving the private key PCI compliance - Answer: This is something merchants who deal with credit card data must be aware of. It involves insuring that saved credit card data is encrypted and stored in a secure fashion. 5 main IT areas - Answer: Infrastructure/operations development business security support ITIL - Answer: Stands for Information Technology Infrastructure Library Created by the UK government Is a framework, meant to be a recommendation, not meant to be followed to the letter SLA's and OLA - Answer: Agreements between IT and other companies, or parts of the business. Usually using KPIs service catalog - Answer: A "restaurant menu" type document listing all IT services which can be requested by users
KMS - Answer: Used to document regular processes, with the hopes of making solutions to technical issues available for cheaper labor - either lower tier tech support, or even customers SOP - Answer: A list of steps to ensure consistency in the implementation of a technical problem CAB - Answer: A board made up of stakeholders which reviews any technical changes to IT for approval CMDB - Answer: A database containing all configuration Items tied to a service in the service catalog. This document becomes useful in planning changes, as well as reacting to equipment failures Incident/Service Request - Answer: When called into the support center, incidents are break/fix tasks to be done, and service requests are items generally requested from the service catalog problem management - Answer: Problem managers evaluate the cost to the business to permanently fix them vs. the cost to continue to fill incident requests
