Category Archives: Uncategorized

1. Layer 1 Connectivity Issues Part 1 We are now in the troubleshooting section and the first part is troubleshooting layer one connectivity. Our first example consists of a pair of big IP device and big IP. One is connected to the authenticated switch that is also connected to three servers. We have another switch, […]

17. [SAA/DVA] Routing Policy – Multi Value So let’s talk about the last routing policy which is MultiValue, which is going to be used when you want to route traffic to multiple resources. And route 53 will therefore return multiple values or resources. Now you can associate them with health checks and so therefore the […]

14. [SAA/DVA] Routing Policy – Geolocation So now let’s talk about the routing policy, geolocation, which is very different from latency based. So this is based on where the user is actually located. So for example, you can say if a user comes from a specific continent or a country, or even more precise on […]

12. [SAA/DVA] Route 53 Health Checks – Hands On So let’s go ahead and create some health checks. So on the left hand side, I’m going to go into the health checks and we’re going to create health checks for all our EC two instances. So we’re going to three health checks. So the first […]

10. [SAA/DVA] Routing Policy – Latency So let’s talk about a routing policy that’s super easy to understand, which is the latency based routing policy. Okay, so now let’s talk about latencybased routing policies. And the idea is that you want to redirect to the resource that is going to have the lowest latency. So […]

8. [SAA/DVA] Routing Policy – Simple Now let’s talk about routing policies for Route 53. So a routing policy is helping Route 52 respond to DNS queries and we shouldn’t be confused about the word routing, okay? This is not like when you have a load balancer and the actual lounger will route traffic to […]

6. [SAA/DVA] Route 53 – TTL Okay, so let’s have a look at TTLs. So a record TTL is a Time to live. And let’s take this example where a client is accessing our DNS, Route 53 and a web server. So we do a DNS request for My Apps example and we get an […]

3. [SAA/DVA] Route 53 – Registering a Domain Okay, so let’s open the Route 53 service, which is a scalable DNS management system. Okay, so as we can see, there’s only one hosted zone for me and one domain for me. That’s because I’ve already registered domain, but for you it should say zero hosted […]

17. [SAA] Direct Connect & Direct Connect Gateway Now let’s talk about Direct Connect, and you may also see it as DX in the exam. So it provides a dedicated private connection from a remote network into your VPC. So you need to set up that dedicated connection and it is using an AWS Direct […]

1. [SAA/DVA] What is a DNS? Okay, so before we talk about route 53, we have to talk about what is a DNS. So this is a basic level lecture, but at least it will help you understand how DNS works. And this is something you’ve been using behind the scenes every day, but you […]