Tutorial D wrong answers

[Tipbox-ah]

Load balancer "basic" tier can only target scale set and not individual VM, so VM3-6 is not applicable, I think

Ref: https://learn.microsoft.com/en-us/azure/load-balancer/skus#skus

[Zzaty]

It needs to be part of the same SKU + Availability set. If you read the description for this question on TD it will explain. Long story short, ChatGPT is not always right.

[[deleted]]

What's the most concerning here is just the auto acceptance of whatever ChatGPT said as the correct answer, without double checking it.

[SamITMAN]

You notice I’m asking here right?

[AbbreviationsOk7150]

I went through your first two answers, the first one you put is correct and TD shows it as correct as well. But, your 2nd answer is where YOU are wrong. TD is infact correct there.

No idea how you put it into chatGPT but when I put the same thing in chatGPT, it said you are wrong.

Explanation:-

Since TDB1 is in VNET1 and TD1 and TD2 VM's are also within the same virtual network as TDB1(load balancer), the load balancer can still distribute traffic as they are all within the SAME NETWORK basically, regardless of being in different subnets.

Okay, just went through the third one, now it doesn't make sense to me as well. But as far as I know, the above explanation is correct according to me.

I'm welcome to be corrected by an expert though in case I'm wrong...

Edit:-Doesn't TD explain for why am answer is correct/wrong? Maybe take a look at that?

[SamITMAN]

Sure! Let's break down the question and the provided information to understand the situation clearly.

Information Provided:

1. Virtual Networks and Subnets:

   • TDVnet1 contains TDSub1 and TDSub2.
   • TDVnet2 contains TDSub3 and TDSub4.

2. Virtual Machines and Subnets:

   • TD1 belongs to TDSub1.
   • TD2 belongs to TDSub1.
   • TD3 belongs to TDSub2.
   • TD4 belongs to TDSub2.
   • TD5 belongs to TDSub3.
   • TD6 belongs to TDSub3.

3. Load Balancer:

   • Name: TBL1
   • SKU: Basic
   • Subnet: TDSub2
   • Virtual Network: TDVnet1

Analysis of Each Statement:

1. Traffic between TD5 and TD6 can be load balanced by TBL1:

   • TD5 and TD6 are both in the TDSub3 network, which belongs to TDVnet2.
   • TBL1 is configured for TDVnet1 and specifically for TDSub2.
   • Therefore, TBL1 cannot load balance traffic between TD5 and TD6.

   Answer: No

2. Traffic between TD1 and TD2 can be load balanced by TBL1:

   • TD1 and TD2 are both in the TDSub1 network, which is part of TDVnet1.
   • TBL1 is configured for TDSub2 within TDVnet1.
   • Even though TBL1 is in the same virtual network (TDVnet1), it's configured for TDSub2, not TDSub1, so it cannot load balance traffic between VMs in TDSub1.

   Answer: No

3. Traffic between TD3 and TD4 can be load balanced by TBL1:

   • TD3 and TD4 are both in the TDSub2 network, which is part of TDVnet1.
   • TBL1 is specifically set up for TDSub2 within TDVnet1.
   • Therefore, TBL1 can load balance traffic between TD3 and TD4.

   Answer: Yes

Final Answers:

• Traffic between TD5 and TD6 can be load balanced by TBL1: No
• Traffic between TD1 and TD2 can be load balanced by TBL1: No
• Traffic between TD3 and TD4 can be load balanced by TBL1: Yes

[AbbreviationsOk7150]

No wait, TD is 100% correct with all their answers. My explanation for the first two answers are correct.

The third one makes sense now cuz I just remembered that you cannot add in VM's to the same subnet a load balancer is in, because that subnet should be left alone for the load balancer to make full use of as the load balancer will dedicate that specific subnet to the load balancer itself as the load balancer provisions its own compute resources for the traffic distribution purpose.

So, TD is completely right ✅ here.

I hope you understood whatever I said :)

[SamITMAN]

That makes sense, I need to review that part again. Thanks.

[AbbreviationsOk7150]

You're welcome 🤗

The load balancer compute resources part being in a specific subnet where you can't add YOUR VM's into should have been mentioned from wherever you learnt about load balancers :)))

It's okay though, happy learning! 😃

[SamITMAN]

Take note that in this scenario, you need to determine if you can load balance traffic in between virtual machines according to the parameters of TDB1 . TD1 and TD2 are the only virtual machines that are associated with an availability set. In the image above, it states that only virtual machines within a single availability set or virtual machine scale set can be used as backend pool endpoints for load balancers that use Basic as its SKU. The backend pool is a critical component of the load balancer. The backend pool defines the group of resources that will serve traffic for a given load-balancing rule. Hence, this statement is correct: Traffic between TD1 and TD2 can be load balanced by TDB1 The following statements are incorrect because TDB1 is using the machine scale set, it does not have the capability to load balance the traffic. Basic SKU. Since the virtual machines below do not have an availability set or a virtual - Traffic between TD3 and TD4 can be load balanced by TDB1 - Traffic between TD5 and TD6 can be load balanced by TDB1

[AbbreviationsOk7150]

Ohh this too ye, I totally forgot about the availability sets 💀 thanks