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Palo Alto Networks PCSFE Exam - Topic 1 Question 48 Discussion

Actual exam question for Palo Alto Networks's PCSFE exam
Question #: 48
Topic #: 1
[All PCSFE Questions]

Which protocol is used for communicating between VM-Series firewalls and a gateway load balancer in Amazon Web Services (AWS)?

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Suggested Answer: B

Geneve is the protocol used for communicating between VM-Series firewalls and a gateway load balancer in Amazon Web Services (AWS). A gateway load balancer is a type of network load balancer that distributes traffic across multiple virtual appliances, such as VM-Series firewalls, in AWS. Geneve is a tunneling protocol that encapsulates the original packet with an additional header that contains metadata about the source and destination endpoints, as well as other information. Geneve allows the gateway load balancer to preserve the original packet attributes and forward it to the appropriate VM-Series firewall for inspection and processing. VRLAN, GRE, and VMLAN are not protocols used for communicating between VM-Series firewalls and a gateway load balancer in AWS, but they are related concepts that can be used for other purposes. Reference:Palo Alto Networks Certified Software Firewall Engineer (PCSFE), [Deploy the VM-Series Firewall with AWS Gateway Load Balancer], [Geneve Protocol Specification]


by Nieves at Aug 14, 2025, 07:00 AM

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Ahmed
3 months ago
I've seen conflicting info about this, anyone else?
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Teddy
4 months ago
Wait, VMLAN isn't a thing?
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Cherelle
4 months ago
Definitely Geneve, that's the standard now.
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Melodie
4 months ago
It's Geneve, for sure!
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Nakita
4 months ago
I thought it was GRE, but I guess not.
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Charlesetta
5 months ago
I remember discussing VRLAN in class, but I don't think that's the right answer for this question. It feels like it could be a trick option.
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Ruthann
5 months ago
I thought VMLAN was a thing, but it doesn't sound right for AWS. I should have reviewed the specific protocols used in cloud environments more.
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Ardella
5 months ago
I keep mixing up GRE and Geneve. I feel like I saw something about GRE in a different context, but I can't recall if it applies here.
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Josphine
5 months ago
I think the protocol might be Geneve, but I'm not completely sure. I remember it being mentioned in a practice question.
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Whitley
5 months ago
Based on my understanding of AWS networking, I believe the correct answer is Geneve. That's the protocol commonly used for communication between virtual network appliances and AWS load balancers.
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Nana
6 months ago
I'm a bit confused on this one. I know there are different tunneling protocols used in AWS, but I'm not confident which one is specifically used for the VM-Series firewall integration. I'll have to make an educated guess.
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Vivienne
6 months ago
Okay, let me see here. I think the key is understanding how VM-Series firewalls integrate with AWS services. I'm going to go with option B, Geneve.
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Lili
6 months ago
Hmm, I'm not entirely sure about this one. I'll have to think it through carefully and review the material on AWS networking protocols.
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Yolande
6 months ago
I'm pretty sure it's Geneve, that's the protocol used for communication between VM-Series firewalls and AWS load balancers.
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Irma
7 months ago
I'm not sure, but I think VRLAN could also be a possible option.
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Anisha
7 months ago
I agree with Mollie, GRE makes sense for communication between VM-Series firewalls and a gateway load balancer.
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Malika
7 months ago
GRE? Nah, that's too generic. It's gotta be something more AWS-specific.
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Felix
3 months ago
VMLAN sounds interesting, but not sure.
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Catherin
3 months ago
Yeah, GRE is too broad for AWS.
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Oliva
3 months ago
I think Geneve is the right choice.
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Giovanna
4 months ago
Geneve fits the AWS ecosystem perfectly!
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Mollie
8 months ago
I think the answer is C) GRE.
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Eden
8 months ago
Hmm, I think it's Geneve. That's the one for AWS, right?
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Lamar
7 months ago
A) VRLAN
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