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What are Azure Virtual Machines?
Azure Virtual Machines are image service instances that provide on-demand and scalable computing resources with usage-based pricing.
More broadly, a virtual machine behaves like a server: it is a computer within a computer that provides the user with the same experience they would have on the host operating system itself. In general, virtual machines are sandboxed from the rest of the system, meaning that the software inside a virtual machine can’t escape or tamper with the underlying server itself.
Each virtual machine provides its own virtual hardware including CPUs, memory, hard drives, network interfaces and other devices.
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Which on-premises servers can be migrated to Azure?
A range of guest operating systems, including the Azure-endorsed Linux and Windows Server versions, can be migrated to Azure. Migrate physical servers or virtual machines from VMware environments and Microsoft Hyper-V environments with Azure Migrate. VMs migrated from these on-premises virtualisation platforms run as native Azure infrastructure as a service (IaaS) VMs and are not dependent on the on-premises hypervisor.
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What is a vCPU?
vCPU stands for virtual central processing unit. A vCPU is a share of a physical CPU that is assigned to a virtual machine. An Azure VM can contain one or more vCPUs.
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Do Azure VMs support hyper-threading?
Some Azure Virtual Machines support hyper-threading. Hyperthreading improves parallelisation of computations performed on x86 microprocessors. For each physical processor core, the operating system addresses two virtual cores and shares the workload between them. A list of Azure VMs supporting hyper-threading is available in Azure Virtual Machines documentation.
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Which operating systems does Azure support?
In addition to various Windows Server versions, Azure supports all of the major Linux distributions, including Red Hat Enterprise Linux, CentOS, CoreOS, Debian, Oracle Linux, SUSE Linux Enterprise, openSUSE and Ubuntu.
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What are availability sets?
Availability sets are logical grouping capabilities to ensure that VM resources placed within them are isolated from each other when they are deployed within an Azure data centre.
Azure ensures that the VMs you place within availability sets run across multiple physical servers, compute racks, storage units and network switches.
If a hardware or Azure software failure occurs, only a subset of your VMs will be affected. Availability sets are an essential capability for building reliable cloud solutions. To provide redundancy for your application, it is recommended that you group two or more virtual machines in an availability set.
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What are VM Scale Sets?
Virtual Machine Scale Sets let you create and manage a group of identical, load balanced and auto-scaling VMs. Deploy virtual machine scale sets using Azure Resource Manager templates which support for Windows and Linux platform images as well as custom images and extensions.
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Azure VM FAQs
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What is Azure Cosmos DB?
Azure Cosmos DB is a fully managed NoSQL database for modern app development. Single-digit millisecond response times, and automatic and instant scalability, guarantee speed at any scale. Business continuity is assured with SLA-backed availability and enterprise-grade security.
Azure Cosmos DB is a globally distributed, multi-model database service for any scale. The service was built from the ground up with global distribution and horizontal scale at its core.
With turnkey global distribution across any number of Azure regions, Azure Cosmos DB transparently scales and replicates your data wherever your users are. Elastically scale your writes and reads all around the globe and only pay for what you need. Azure Cosmos DB provides native support for NoSQL and OSS APIs, including MongoDB, Cassandra, Gremlin, etcd, Spark and SQL. It also offers multiple well-defined consistency models, guaranteed single-digit-millisecond read and write latencies at the 99th percentile, and guaranteed 99.999-per cent high availability with multi-homing anywhere in the world – all backed by industry-leading, comprehensive SLAs.
Azure Cosmos DB is a fully managed service that enables you to offload the administrative burdens of operating and scaling distributed databases to Azure, so you don’t have to worry about managing VMs, hardware provisioning, setup and configuration, capacity, replication, software patching or cluster scaling.
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How does Azure Cosmos DB manage consistency?
Azure Cosmos DB approaches data consistency as a spectrum of choices, with more options than the two extremes of strong and eventual consistency.
Choose from five well-defined models on the consistency spectrum:
- Strong
- Bounded staleness
- Session
- Consistent prefix
- Eventual
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How does Azure Cosmos DB support availability, scalability, and durability?
Azure Cosmos DB transparently replicates your data across all the Azure regions associated with your Azure Cosmos DB account. The service applies multiple layers of redundancy to your data.
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Azure Cosmos DB FAQs
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What is Azure Active Directory?
The Azure Active Directory (Azure AD) enterprise identity service provides SSO and multi-factor authentication to help protect your users from 99.9 per cent of cybersecurity attacks.
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What is conditional access?
Conditional access is a capability of Azure AD that lets you implement automated access-control decisions for accessing your cloud apps based on conditions. Conditional access policies are enforced after the first-factor authentication has been completed. It’s not intended as a first-line defence for scenarios such as denial-of-service (DoS) attacks, but it uses signals from these events to determine access.
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Does Azure AD enable authentication and SSO using SAML or OIDC?
Yes. Azure AD supports several standardised protocols for authentication and authorisation, including SAML 2.0, OpenID Connect, OAuth 2.0 and WS-Federation. It also supports password vaulting and automated sign-in capabilities for apps that only support forms-based authentication.
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Azure AD FAQs
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What is API Management?
Azure API Management Service helps to publish, manage, evaluate, and protect APIs within several minutes. API Management system of Azure happens to be a turnkey system that is best designed for distributing APIs to internal as well as external clients.
You can quickly produce sophisticated and reliable API gateways for established backend services regardless of the location of the hosting. Apart from publishing and maintaining them with API Management of Azure, you will also have access to microservice architectures through APIs.
Build apps faster and deliver immediate value to your customers through API-first approaches. Decouple front and back-end teams through API mocking, API revisions and versioning, and automating API documentation.
With the provision of a developer platform and the corresponding tools, you can use the designated user model as per your preference. Apart from this, you can choose a serverless consumer-based user model for automatic scaling, built-in high availability, as well as instantaneous provisioning.
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Can I manage my API Management instance programmatically?
Yes, you can manage API Management programmatically by using the API Management REST API, the Azure API Management Service management library SDK, Windows Deployment Services or Azure Service Management PowerShell cmdlets.
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Azure API Management FAQs
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What is Azure Backup?
Azure Backup is a cost-effective, secure one-click backup solution that’s scalable based on your backup storage needs. The centralised management interface makes it easy to define backup policies and protect a wide range of enterprise workloads, including Azure Virtual Machines, SQL and SAP databases, and Azure file shares.
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What resources does Backup support?
Backup supports Azure Virtual Machines, SQL workloads and on-premises VMware machines.
The backup service of Azure is also amongst the most well-known Azure web app services which are extremely in-demand amongst enterprises. An azure backup is a perfect tool to simplify data protection against ransomware and human errors. It happens to be an inexpensive backup solution that needs only a single click.
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What is a Recovery Services vault?
A Recovery Services vault is a storage entity in Azure that houses data, including data copies and configuration information, for virtual machines, workloads, servers and workstations.
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What’s the difference between Azure Backup and Azure Site Recovery?
Both Backup and Site Recovery support backup and disaster recovery. Backup is designed specifically to back up and restore data, while Site Recovery is designed to perform seamless application disaster recovery.
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Azure Backups FAQs
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What is Azure CDN?
The Azure Content Delivery Network Service offers the advantages of secure and dependable content delivery as well as acceleration. Azure CDN is able to integrate successfully with other Azure services including Web Apps, Cloud Services, and Storage.
Azure Content Delivery Network (CDN) lets you reduce load times, save bandwidth and speed responsiveness – whether you’re developing or managing websites or mobile apps, or encoding and distributing streaming media, gaming software, firmware updates or IoT endpoints.
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Azure CDN FAQs
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What is Azure Logic Apps?
Azure Logic App helps you uutomate the access and use of data across clouds without writing code.
-Leverage write-once, run anywhere ability
-Consistent integration with developer tools and services
-Create business processes and workflows visually
-Integrating with SaaS and enterprise applications
-Unlock value from on-premises and cloud applications
-Automate EAI, B2B/EDI and business processes
-Take advantage of the Microsoft Cloud to enhance your integration solutions
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Azure Logic Apps FAQs
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What is Azure Bot Services?
Intelligent, serverless bot services that scale on demand
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What’s the difference between Azure Bot Services and Bot Framework SDK and tools?
Bot Framework is comprised of an open-source SDK and tools for end-to-end bot development. Microsoft Azure Bot Services help you manage, connect and deploy your bot across devices and popular channels.
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Can I host my bot on my own servers?
Yes, you can host your bot anywhere on the Internet, on your own servers, in Azure or in any data centre. Note: Your bot must expose a publicly accessible HTTPS endpoint.
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Azure BOTS FAQs
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What is Azure Site Recovery?
Azure Site Recovery offers ease of deployment, cost effectiveness and dependability. Deploy replication, failover and recovery processes through Site Recovery to help keep your applications running during planned and unplanned outages.
Keep your business running with built-in disaster recovery service
Site Recovery is a native disaster recovery as a service (DRaaS), and Microsoft has been recognised as a leader in DRaaS based on completeness of vision and ability to execute by Gartner in the 2019 Magic Quadrant for Disaster Recovery as a Service.
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Azure Site Recovery FAQs