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Exam Professional Cloud Network Engineer topic 1 question 128 discussion

Actual exam question from Google's Professional Cloud Network Engineer
Question #: 128
Topic #: 1
[All Professional Cloud Network Engineer Questions]

Your company has provisioned 2000 virtual machines (VMs) in the private subnet of your Virtual Private Cloud (VPC) in the us-east1 region. You need to configure each VM to have a minimum of 128 TCP connections to a public repository so that users can download software updates and packages over the internet. You need to implement a Cloud NAT gateway so that the VMs are able to perform outbound NAT to the internet. You must ensure that all VMs can simultaneously connect to the public repository and download software updates and packages. Which two methods can you use to accomplish this? (Choose two.)

  • A. Configure the NAT gateway in manual allocation mode, allocate 2 NAT IP addresses, and update the minimum number of ports per VM to 256.
  • B. Create a second Cloud NAT gateway with the default minimum number of ports configured per VM to 64.
  • C. Use the default Cloud NAT gateway's NAT proxy to dynamically scale using a single NAT IP address.
  • D. Use the default Cloud NAT gateway to automatically scale to the required number of NAT IP addresses, and update the minimum number of ports per VM to 128.
  • E. Configure the NAT gateway in manual allocation mode, allocate 4 NAT IP addresses, and update the minimum number of ports per VM to 128.
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Suggested Answer: DE 🗳️
by playpacman at Dec. 1, 2022, 1:26 p.m.

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pfilourenco
Highly Voted 10 months, 4 weeks ago
Selected Answer: DE
D & E. D autosacle. E can support 2016VM's ⌊(NAT IP address) × (64,512 ports per address) / (ports per VM)⌋ Info:https://cloud.google.com/nat/docs/ports-and-addresses#port-reservation-examples
upvoted 8 times
AzureDP900
10 months, 3 weeks ago
Agree with your explanation. D, E satisfy the requirements.
upvoted 1 times
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playpacman
Highly Voted 11 months ago
if you do the math its D and E
upvoted 6 times
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Komal697
Most Recent 7 months ago
Selected Answer: DE
Option D suggests using the default Cloud NAT gateway to automatically scale to the required number of NAT IP addresses, and updating the minimum number of ports per VM to 128. Option E suggests configuring the NAT gateway in manual allocation mode, allocating 4 NAT IP addresses, and updating the minimum number of ports per VM to 128. Both options would allow all 2000 VMs to simultaneously connect to the public repository and download software updates and packages over the internet. Option D is more automated and requires less manual configuration, while option E provides more control over the allocation of NAT IP addresses.
upvoted 3 times
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ccieman2016
11 months ago
Selected Answer: DE
Agree, D and E in my opinion. https://cloud.google.com/nat/docs/overview
upvoted 4 times
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