SA101-Lesson-2.pdf

SAM-101 LESSON 2  1. Respect the privacy of others With great 2. Think before you type power comes great a) Plan ahead responsibilities b) Document what you did  Production The parts of the infrastructure whe...

SAM-101 LESSON 2  1. Respect the privacy of others With great 2. Think before you type power comes great a) Plan ahead responsibilities b) Document what you did  Production The parts of the infrastructure where a certain service is executed and served to users Never test in production Test Environment A virtual machine running the same configuration of the production environment.  The more users your service reaches, the more you’ll want to ensure that changes aren’t disruptive. Assessing risks The more important your service is to your company's operations, the more you'll work to keep the service up.  Reproduction Case Fixing things, Creating a roadmap to retrace the right way the steps that led the user to an unexpected outcome  What steps did you take to get to this point? What's the unexpected or bad Fixing things, result? the right way And what's the expected result? IT Infrastructure Services THE ROLE OF IT INFRASTRUCTURE SERVICES IN SYSADMIN IT Infrastructure Components  Amazon EC2 Linode IaaS Windows Azure Infrastructure as a Service Google Compute Engine   IaaS, or Infrastructure as a Service, is a cloud computing model that provides on-demand access to computing resources such as servers, storage, networking, and virtualization.  Infrastructure as a service (IaaS) is the on-demand availability of highly scalable computing resources as IaaS services over the Internet. Infrastructure  It eliminates the need for enterprises to as a Service procure, configure, or manage infrastructure themselves, and they only pay for what they use.  IaaS helps eliminate much of the complexity and costs associated with building and maintaining physical infrastructure in an on-premises data center  Microsoft Office 365 Google G Suite SaaS Software as a Google Workspace Service   Software-as-a-Service (SaaS) provides on-demand software applications and executes them online instead of buying and installing them on a local computer. This software is installed on the host machine, SaaS and the cloud provider maintains Software as a the application on behalf of the Service company.  It helps the company reduce the installation and maintenance costs related to IT infrastructure.  Software-as-a-Service (SaaS) is also called as On-Demand Software.  Some of the SaaS applications are : Billing and invoicing system Customer Relationship Management (CRM) applications SaaS Software as a Mail Services Service Help desk applications Social Networks Human Resource (HR) solutions Document Management  Heroku Windows Azure PaaS Google App Platform as a Engine Service AWS Elastic Beanstalk   Paas is a cloud computing model where a third-party provider delivers hardware and software tools to users over the internet.  Usually, these tools are needed for application development. PaaS Platform as a  A PaaS provider hosts the Service hardware and software on its own infrastructure.  As a result, PaaS frees developers from having to install in-house hardware and software to develop or run a new application  PaaS services include the following:  development team collaboration;  application design and development; PaaS Platform as a  application testing and Service deployment;  web service integration;  information security; and  database integration.  Cloudflare Perimeter 81 NaaS Amazon Web Network as a Services Service Hewlett Packard Enterprise   Network-as-a-service (NaaS) is a cloud service model in which customers request the networking infrastructure for those who don’t want to build NaaS their applications. Network as a  NaaS is a cloud model that Service enables users to easily operate the network and achieve the outcomes they expect from it without owning, building, or maintaining their own infrastructure.  Benefits of Network-as-a-service (NaaS) 1. Scalability: Cloud services are easily scalable compared to traditional models and can be easily scaled as per the user's requirements. NaaS 2. Accessibility: Based on how the cloud Network as a network is configured, the application is Service accessible from anywhere at any time without a VPN and independent of the platform or device used for access. 3. No Maintenance: The infrastructure maintenance depends upon the service provider, so the customer does not need to worry after the updates.  Benefits of Network-as-a-service (NaaS) 4. Security: NaaS providers make it possible by providing networking and security services such as firewalls. This offers customers a tight integration NaaS between network and network security. Network as a 5. Cost Saving: The customer doesn't Service need to buy, configure and manage the hardware infrastructure; its cloud provider maintains and provides services to the client.  Disadvantages of Network-as-a-service (NaaS) 1.Compatibility: The NaaS service provider may not be compatible with the legacy system, such as old hardware, on- premises applications, etc. 2.Vendor Lock-in: Once customers take NaaS services from one service provider, Network as a switching to another vendor will be risky. Also, if the vendor's infrastructure fails or Service the vendor increases the cost, the enterprise may suffer from it. 3.Legacy Data Centre: For an organization still running applications and processes on their in-the-house data centre, not on the cloud, it will be difficult to move large applications and processes in NaaS.  A directory service, centralizes your organizations users and computers in one location so that you can add, update, and remove users and Directory computers. Example: Services Windows Active Directory OpenLDAP  How can the following IT Infrastructure component aid the organization? Cite Examples of Learning each to support your discussion. Activity 1. Infrastructure as Service 2. Software as a Service 3. Network as Service  1. What are the key security challenges a system administrator faces when managing an IT infrastructure that incorporates IaaS, SaaS, and NaaS, and what strategies can be employed to Homework mitigate these risks? 2. How can system administrators effectively integrate IaaS, SaaS, and NaaS to create a unified and efficient IT infrastructure, and what are the best practices for ensuring smooth service delivery?