Exam Professional Cloud Network Engineer All Questions

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Exam Professional Cloud Network Engineer topic 1 question 53 discussion

Actual exam question from Google's Professional Cloud Network Engineer

Question #: 53
Topic #: 1

[All Professional Cloud Network Engineer Questions]

Your software team is developing an on-premises web application that requires direct connectivity to Compute Engine Instances in GCP using the RFC 1918 address space. You want to choose a connectivity solution from your on-premises environment to GCP, given these specifications:
✑ Your ISP is a Google Partner Interconnect provider.
✑ Your on-premises VPN device's internet uplink and downlink speeds are 10 Gbps.
✑ A test VPN connection between your on-premises gateway and GCP is performing at a maximum speed of 500 Mbps due to packet losses.
✑ Most of the data transfer will be from GCP to the on-premises environment.
✑ The application can burst up to 1.5 Gbps during peak transfers over the Interconnect.
✑ Cost and the complexity of the solution should be minimal.
How should you provision the connectivity solution?

A. Provision a Partner Interconnect through your ISP.
B. Provision a Dedicated Interconnect instead of a VPN.
C. Create multiple VPN tunnels to account for the packet losses, and increase bandwidth using ECMP.
D. Use network compression over your VPN to increase the amount of data you can send over your VPN.

Show Suggested Answer

Suggested Answer: A 🗳️

by majun at Nov. 13, 2020, 2:54 a.m.

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garbad

Highly Voted 4 years, 6 months ago

Answer is A, cost and complexity of multiple tunnel vpn is very high, also , dedicated interconnect is not required as required max speed is 1.5gbps Also , direct connectivity is bogus verb, all the solution provide direct connectivity to your vpc instance , once connected through router

upvoted 27 times

AzureDP900

2 years, 8 months ago

A is right

upvoted 2 times

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JohnnyBG

Highly Voted 4 years ago

Everybody that says C please do not take this exam and never be consulted for network related question ...

upvoted 14 times

desertlotus1211

1 year, 12 months ago

what makes you think PI is not complex? Relying on the partner to do their job is challenging. BTW - do you know the cost of PI vs VPN? do the math first

upvoted 1 times

gcpengineer

1 year, 11 months ago

vpn operation of having multiple tunnel at max 3-4 tunnels...rather hav a partner connect. if cost is factor, its better to stay in on prem

upvoted 1 times

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saraali

Most Recent 5 months, 2 weeks ago

Selected Answer: A

The best solution for your scenario is A. Provision a Partner Interconnect through your ISP. Explanation: Partner Interconnect is a connectivity solution provided by Google Cloud that allows you to establish a dedicated connection from your on-premises network to Google Cloud via a Google Partner Interconnect provider. This solution is well-suited to scenarios where you want a reliable, high-speed connection but don’t need the full capacity of a Dedicated Interconnect.

upvoted 1 times

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nkastanas

1 year, 1 month ago

Selected Answer: A

Dedicated Interconnect is for organizations that need high bandwidth, low latency, and have the capability to manage a direct physical connection in a colocation facility. Partner Interconnect is for organizations that prefer a simpler, more flexible setup and do not have the infrastructure to support a Dedicated Interconnect.

upvoted 2 times

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desertlotus1211

1 year, 5 months ago

Do the math people: https://cloud.google.com/network-connectivity/pricing#partner-pricing A 2 tunnel VPN is $297.80 per month.... A PI is $2.36 per hour per VLAN attachment (@10Gigs) plus data transfer.... ARE YOU SURE IT'S CHEAPER THAN VPN PER MONTH?

upvoted 1 times

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xhilmi

1 year, 7 months ago

Selected Answer: A

Partner Interconnect (Option A): This solution involves using your ISP as a Google Partner Interconnect provider. It establishes a connection between your on-premises network and Google's network through the service provider. Partner Interconnect can offer a dedicated and reliable connection with specified bandwidth. Given the requirement for direct connectivity, the fact that your ISP is a Google Partner Interconnect provider, and considering factors like minimal cost and complexity, this could indeed be a suitable choice.

upvoted 2 times

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Komal697

2 years, 4 months ago

Selected Answer: B

Option B, provisioning a Dedicated Interconnect, is the most appropriate solution because it can provide a dedicated, private, high-speed connection between the on-premises environment and GCP. Dedicated Interconnects offer a guaranteed bandwidth of up to 10 Gbps, and can be upgraded for burstable traffic as needed. Additionally, they offer SLAs for reliability and support.

upvoted 2 times

Komal697

2 years, 4 months ago

Option A, provisioning a Partner Interconnect, could be a valid solution but may not provide the same guaranteed bandwidth as a Dedicated Interconnect, and may be subject to the same packet loss issues as a VPN. Option C, creating multiple VPN tunnels and using ECMP, could improve reliability and increase bandwidth, but may not provide the necessary speeds and guaranteed bandwidth for the application requirements. Option D, using network compression, could increase the amount of data transferred over the VPN, but would not address the issue of packet losses and may not provide the necessary speeds and reliability for the application requirements.

upvoted 1 times

desertlotus1211

2 years, 2 months ago

Partner Interconnect provided up to 10GB pipes... DI requires you to be in an area where DI are available. You already have your partner provider... no need to search and go through DI requirements. Minimal cost and complexity

upvoted 1 times

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Popa

2 years, 5 months ago

Selected Answer: A

It is A, partner interconnect. It supports RFC 1918 as well as required max speed. https://cloud.google.com/hybrid-connectivity/

upvoted 1 times

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pk349

2 years, 6 months ago

• C. Create multiple VPN ***** tunnels to account for the packet losses, and increase bandwidth using ECMP. It’s very common to use parallel links to increase bandwidth. This mechanism is often called equal-cost multipath (ECMP). ECMP often works well, but there are a few caveats. Before we get to the issue of running BGP over parallel links, it’s important to look at how traffic is split over multiple parallel links. Dedicated Interconnect provides a direct physical connection between your on-premises network and Google's network. Partner Interconnect provides connectivity between your on-premises and VPC networks through a supported service provider.

upvoted 1 times

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Moran12

2 years, 9 months ago

Selected Answer: A

Partner would be cost effective as egress traffic would be lower than vpn

upvoted 2 times

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Mr_MIXER007

2 years, 10 months ago

Selected Answer: A

AAAAAAAAAA

upvoted 3 times

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vladani

3 years, 6 months ago

Selected Answer: A

Ans - A

upvoted 2 times

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kumarp6

3 years, 7 months ago

Answer is : A

upvoted 2 times

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desertlotus1211

3 years, 7 months ago

https://cloud.google.com/blog/products/networking/google-cloud-network-connectivity-options-explained Answer A is better...

upvoted 3 times

AzureDP900

2 years, 8 months ago

Thank you for sharing the link, I agree with A.

upvoted 2 times

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MrPajonko

3 years, 7 months ago

Selected Answer: C

It states that private RFC 1918 ip addressing is required. Partner Interconnect doesn't use private IP addressing, public only. Correct answer is C.

upvoted 2 times

MrPajonko

3 years, 7 months ago

Sorry guys for misleading - Pricate Intercconect ofcourse use private IP addressing.

upvoted 1 times

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desertlotus1211

3 years, 7 months ago

You need to revisit how Partner and Dedicated Interconnect works...Public IPs are only needed for BGP peering

upvoted 2 times

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ThisisJohn

3 years, 9 months ago

I would vote for A because of this statement " Most of the data transfer will be from GCP to the on-premises environment.". According to the documentation, carrier peering "Has reduced internet egress rates to your on-premises network " while Cloud VPN "Has standard egress rates for traffic sent through an Interconnect connection;" https://cloud.google.com/network-connectivity/docs/how-to/choose-product#cp-compare

upvoted 4 times

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jeeet_

4 years, 1 month ago

C, Question is challenging. --> application can burst upto 1.5Gbps, --> Cloud VPN- can burst upto 3Gbps, and with double VPN we can minimize packet loss and bandwidth upto 6Gbps, -> Interconnect initial setup is complex, you need to email to google, then talk to your vendor (which is google itself) and common peer zone. It's time consuming. Since they already have a single tunnel VPN, setting up another won't take much of time.

upvoted 2 times

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