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Exam Professional Cloud Network Engineer topic 1 question 134 discussion

Actual exam question from Google's Professional Cloud Network Engineer
Question #: 134
Topic #: 1
[All Professional Cloud Network Engineer Questions]

You recently deployed two network virtual appliances in us-central1. Your network appliances provide connectivity to your on-premises network, 10.0.0.0/8. You need to configure the routing for your Virtual Private Cloud (VPC). Your design must meet the following requirements:

• All access to your on-premises network must go through the network virtual appliances.
• Allow on-premises access in the event of a single network virtual appliance failure.
• Both network virtual appliances must be used simultaneously.

Which method should you use to accomplish this?

  • A. Configure two routes for 10.0.0.0/8 with different priorities, each pointing to separate network virtual appliances.
  • B. Configure an internal HTTP(S) load balancer with the two network virtual appliances as backends. Configure a route for 10.0.0.0/8 with the internal HTTP(S) load balancer as the next hop.
  • C. Configure a network load balancer for the two network virtual appliances. Configure a route for 10.0.0.0/8 with the network load balancer as the next hop.
  • D. Configure an internal TCP/UDP load balancer with the two network virtual appliances as backends. Configure a route for 10.0.0.0/8 with the internal load balancer as the next hop.
Show Suggested Answer Hide Answer
Suggested Answer: D 🗳️
by ccieman2016 at Dec. 3, 2022, 10:09 p.m.

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pfilourenco
Highly Voted 2 years, 2 months ago
Selected Answer: D
D is the correct. Use an internal TCP/UDP load balancer as the next hop. https://cloud.google.com/architecture/architecture-centralized-network-appliances-on-google-cloud#choosing_a_high_availability_option
upvoted 5 times
PotatoGCP
1 year, 3 months ago
Based on the above link, it is clear that it should be network LB. The answer should be C.
upvoted 3 times
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Thornadoo
1 year, 5 months ago
I don't get it - the link mentions nothing about TCP - Infact it seems to point more towards C - Network LB.
upvoted 7 times
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jorgesoma
11 months, 3 weeks ago
C correct in my opinion. Network LB
upvoted 1 times
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r0b00t
10 months, 3 weeks ago
D is indeed correct. C is wrong as it's not specific on the type of network LB which can be external/internal network LBs.
upvoted 1 times
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teejeaux
Most Recent 1 month, 3 weeks ago
Selected Answer: D
According to ChatGPT, the NLB is only for External LB, not internal. So it has to be D.
upvoted 1 times
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Gwendal
5 months ago
Selected Answer: C
https://cloud.google.com/load-balancing/docs/internal/setting-up-ilb-next-hop
upvoted 1 times
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ian_gcpca
7 months, 2 weeks ago
Selected Answer: D
the traffic is from VPC to on-prem which is internal flow, therefore if we apply Google's best practice, it should be TCP/UDP lb. Yes, NLB can direct traffic to 2 NVAs but its not the ideal choice for this scenario since NLB is best use for external load balancing.
upvoted 1 times
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dev62
11 months, 3 weeks ago
https://cloud.google.com/load-balancing/docs/passthrough-network-load-balancer#next-hops Answer is C
upvoted 3 times
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gonlafer
1 year ago
Selected Answer: C
https://cloud.google.com/architecture/architecture-centralized-network-appliances-on-google-cloud#choosing_a_high_availability_option
upvoted 1 times
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Kyle1776
1 year, 1 month ago
Selected Answer: C
Answer is C Network Load balancer https://cloud.google.com/architecture/architecture-centralized-network-appliances-on-google-cloud#choosing_a_high_availability_option Use an internal passthrough Network Load Balancer as the next hop. In this approach, you place multiple virtual appliances in a managed instance group behind an internal passthrough Network Load Balancer. This load balancer is used as the next hop for a default route that replaces the default route in the VPC networks connected to the appliances. You can use appliances either in an active/active configuration, which is the standard configuration, or in an active/passive configuration, by employing failover for internal passthrough Network Load Balancers. Health checks direct traffic to healthy instances.
upvoted 1 times
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YushiSato
1 year, 2 months ago
Selected Answer: D
I suspect that the name Load Balancer in this question refers to the one before the change. In that case, Network Load Balancer specifically indicates Reagional External TCP/UDP Network Load Balancer. Sorry for the Japanese, but here are the documents. https://blog.g-gen.co.jp/entry/external-https-load-balancing-explained
upvoted 1 times
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PotatoGCP
1 year, 3 months ago
Selected Answer: C
https://cloud.google.com/architecture/architecture-centralized-network-appliances-on-google-cloud#choosing_a_high_availability_option
upvoted 1 times
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rglearn
1 year, 6 months ago
Selected Answer: D
TCP LB as next hop.
upvoted 1 times
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fpreli
1 year, 7 months ago
Actually, from the documentation https://cloud.google.com/architecture/architecture-centralized-network-appliances-on-google-cloud#choosing_a_high_availability_option It seems to be C. "Use an internal passthrough Network Load Balancer as the next hop. In this approach, you place multiple virtual appliances in a managed instance group behind an internal passthrough Network Load Balancer. This load balancer is used as the next hop for a default route that replaces the default route in the VPC networks connected to the appliances."
upvoted 2 times
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SZON
1 year, 11 months ago
D is correct
upvoted 1 times
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pk349
2 years, 1 month ago
• D. Configure an internal TCP/UDP ******* load balancer with the two network virtual appliances as backends. Configure a route for 10.0.0.0/8 with the internal load balancer as the next hop.
upvoted 1 times
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AzureDP900
2 years, 2 months ago
D. Configure an internal TCP/UDP load balancer with the two network virtual appliances as backends. Configure a route for 10.0.0.0/8 with the internal load balancer as the next hop
upvoted 1 times
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al_zo
2 years, 2 months ago
Selected Answer: D
it's D.
upvoted 2 times
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playpacman
2 years, 2 months ago
I also vote for D
upvoted 2 times
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ccieman2016
2 years, 2 months ago
Selected Answer: C
In my opinion is C, I did this setup on azure cloud, but honestly never make this setup in GCP. LB layer 7 don't work here. we need NLB
upvoted 1 times
ccieman2016
2 years, 2 months ago
I review and changed my answer, D is more sure here.
upvoted 6 times
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A (35%)
C (25%)
B (20%)
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