Cloud Essentials CLO-002

Cloud Essentials CLO-002 Type 1 hypervisor ️Also known as a bare metal Sits on the hardware Acts as OS Faster than Type 2 Type 2 Hypervisor ️Sits on top of the OS Commonly used in client side virtualization Ex: User running windows and linux on same PC Kernel-based Virtual Machine ️Open source virtualization software included in Linux Infracstructure as a Service (IaaS) ️The CSP provides hardware infrastructure. This often means compute, storage, and network capabilities. Platform as a Service (PaaS) ️Adds features to IaaS that include OSs and software development tools such as runtime environments. The vendor manages the various hardware platforms, freeing up the software developer to focus on building their application and scaling it. Software as a Service (SaaS) ️Delivers applications over the cloud using a pay-per-use revenue model Elastic ️meaning the cloud can grow or shrink as the client's needs change made possible by resource pooling Self Service ️This characteristic allows users to access additional resources (such as storage, network, or compute) automatically, 24 hours a day, 7 days a week, 365 days a year, without requiring intervention from the service provider. Scalability ️The ability to use more or fewer resources is called Broad Network Access ️Applies to clients using different OSs, such as Windows, macOS, Linux, iOS, or Android Availability ️Means that cloud resources are accessible and responsive whenever a client needs them. Shared responsibility model ️Customer: responsible for security "in" the cloud Provider responsible for security "of" the cloud Recovery point objective (RPO) ️How old can restored data be and still be useful to use to run the business? Recovery Time Objective (RTO) ️It defines how long the CSP has to get everything operational, including network access and data restoration Areas that should be covered in redundancy plans ️Process Software Network Hardware Public Cloud Pros/Cons ️The client does not need to invest in hardware that will go obsolete in a few years, but downsides can be a lack of control and security. Private Cloud Pros/Cons ️Allow the company to retain security and resource control but usually cost more because of the hardware replacement life cycle. Hybrid Cloud Pros/Cons ️Hybrid clouds are the best and worst of both worlds because they combine features of public and private clouds. Six Characteristics of clouds ️Pay as you go Availability Scalability Elasticity Self-Service Broad Network Access The cloud security model is called ️Shared Responsibility Model software-defined networking (SDN) ️using a central control program separate from network devices to manage the flow of data on a network. SDN allows apps to communicate with it and then passes the traffic to the respective network equipment. Load Balancing ️Distributing a computing or networking workload across multiple systems to avoid congestion and slow performance. (Ex: Amazon web servers receive request from load balancers to distribute shopper requests on their site) Load Balancing Benefits ️Performance Scalability Reliability Zone File ️A text file associated with a DNS zone that contains resource records identifying domains and their IP addresses. DNS ️53 HTTP ️80 HTTPS ️443 SSH ️22 Software-defined storage (SDS) ️Separates the software for managing data storage from storage hardware Block Storage ️Files are split into chunks of data of equal size, assigned a unique identifier, and then stored on the hard drive. Data reads and writes are always of the same size, data transfers are more efficient and therefore faster. Latency is lower than with other types of storage. Object Storage ️a company can make the organization and retrieval of unstructured data easier. No restrictions on object size There is no hierarchy Compression ️Redundant data within a file is removed to save storage space in a storage volume