In this post, I am going to share some quick tips, including Q/A’s and useful links from Azure Job Oriented Day 7 Training of our recently launched new batch of Microsoft Azure Job Oriented, in which we have 25+ hands-on labs in the course.
On our Day 7 Live Session, we covered Azure SLA, Load Balancer, Application Gateway.
The last week In Day 6 session we covered about Azure Firewall.
Two weeks before In Day 5 session we covered about Azure NSG,ASG and Bastion host.
Three weeks before In Day 4 session we covered about Azure VPN Gateway , Express Route.
Four weeks before In Day 3 session we covered about Azure Networking and VNet peering.
Five weeks before In Day 2 session we covered about Azure Resource Manager, Subscriptions, NSG, and PowerShell.
Six weeks before In Day 1 session we covered about Azure Cloud Fundamentals, App Services, and Scaling Strategies.
What is Azure SLA?
Azure Service Level Agreements (SLAs) ensure the availability and performance of Azure services by defining the minimum percentage of uptime for a service over a specific time period. Microsoft agrees to these SLAs, guaranteeing that qualified Azure services are available and operable, with compensation offered in the event of SLA violations. Customers can have confidence in the dependability and consistency of Azure services for their applications and workloads because of the SLAs.
Q1) How do you get 99.99% availability in virtual machines?
Ans. You can achieve 99.99 % availability in virtual machines that have two or more instances deployed across two or more Availability Zones in the same Azure region, Azure guarantee that you will be able to connect to at least one instance 99.99% of the time.
Q2) What is uptime in an Azure SLA?
Ans. The amount of time a service is available and operational is referred to as uptime. An Azure SLA may state the percentage of uptime that Microsoft guarantees for a certain service.
Q3) What happens if Azure service downtime exceeds the SLA?
Ans. If the actual unavailability of an Azure service exceeds the guaranteed SLA downtime, Microsoft will issue service credits to qualifying customers as compensation.
What is Azure Load Balancer?
Azure Load Balancer is a Microsoft Azure tool that distributes incoming network traffic over several virtual machines or services, thereby ensuring that applications remain stable and responsive. It improves application availability and fault tolerance by efficiently spreading the workload, resulting in improved performance and reduced downtime.
Q1) What is load balancer and how it works?
Ans. A load balancer is a computer server traffic controller. When users send requests to a website or application, the load balancer spreads the incoming traffic evenly across multiple servers, avoiding any one server from getting overburdened. This ensures prompt and effective responses. The load balancer constantly monitors the health of the servers and routes traffic to the least busy server. It also improves performance, availability, scalability, and fault tolerance by diverting traffic in the event of server failure. Load balancers, in essence, improve online service stability and responsiveness by intelligently controlling server workloads.
Q2) Can Azure Load Balancer handle both incoming and outgoing traffic?
Ans. Yes, both incoming and outgoing traffic will be managed using Azure Load Balancer.
Q3) What are the benefits of azure load balancer?
Ans. Azure Load Balancer is a cloud-based load balancer that can improve the performance, availability, and security of your Azure applications. It is a managed service that is simple to set up and operate, and it can scale to match your application’s needs. Azure Load Balancer will also be used to spread traffic over various regions, making it an excellent choice for applications that require global accessibility.
Q4) What is session persistence?
Ans. It gives ability how long user can handle or access the application during disconnection due to network issues.
What is Azure Application Gateway?
Azure Application Gateway is a service that functions as a smart traffic distributor for web applications, sending incoming internet traffic to various backend services or virtual machines depending on predefined rules. It not only optimizes application delivery and controls SSL encryption, but it also provides enhanced security features via web application firewall capabilities, contributing to the efficiency, security, and speed of Azure-hosted online applications.
Q1) What are the main features of Azure Application Gateway?
Ans. Application-level routing, SSL offloading, session affinity, web application firewall (WAF), and autoscaling are among the services provided by Azure Application Gateway.
Q2) What is Web Application Firewall (WAF) in Application Gateway?
Ans. Web Application Firewall is an Azure Application Gateway security feature that helps protect web applications from typical vulnerabilities and attacks like SQL injection and cross-site scripting.
Q3) How does Azure Application Gateway work?
Ans. Incoming HTTP/HTTPS requests are routed to backend servers depending on URL paths, hostnames, or other criteria. It operates as a reverse proxy, spreading traffic to several backend pools based on the routing rules that have been specified.
Q4) What is session affinity (sticky sessions) in Application Gateway?
Ans. Session affinity ensures that user requests from the same session are sent to the same backend server. In circumstances where session data is critical, this can be beneficial for keeping application state.
Frequently Asked Questions
Q1)Is Azure load balancer layer 4 or 7?
Ans. It works at the layer 4 of OSI model.
Q2)What is an Azure Application Gateway?
Ans. An Azure Application Gateway is a Microsoft Azure load balancing solution that enables the efficient and safe delivery of web applications. It works as a reverse proxy, forwarding incoming HTTP and HTTPS traffic to backend servers and provides capabilities including as SSL termination, URL-based routing, and web application firewall (WAF) for improved performance, scalability, and security of Azure-hosted web applications.
Q3)What do you mean by SLA in Azure?
Ans. The Azure Service Level Agreement (SLA) sets Microsoft's uptime and connection obligations for particular Azure services. The SLA is derived by calculating the percentage of time a service is available by the number of hours in a year. The SLA also specifies the compensation provided by Microsoft if a service fails to meet its availability commitment.
Related/References
- [AZ-104] Microsoft Azure Administrator Exam: Everything You Need To Know
- Activity Guides/Hands-on Lab Exercise
- Cloud Services Model
- Cloud Computing – Overview & Benefits
- Azure Region and Availablity Zone
- How to create a free tier account on Azure
- Microsoft Azure Core Services For Beginners
Next Task For You
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