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PAS-C01 Enhanced Networking (ENA) Practice Question

This PAS-C01 practice question tests your understanding of technology. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. A key principle to apply: enhanced Networking (ENA). Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.

An SAP Basis team is implementing SAP HANA system replication across two AWS Availability Zones. The HANA primary instance uses Premium SSD v2 (P30) managed disks. The secondary instance must be kept in sync with minimal data loss. Which networking configuration is required to ensure low-latency, high-throughput replication traffic between the instances?

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

  • Clue: "primary"

    Why it matters: Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

Enable Enhanced Networking (ENA) and place the instances in a placement group with cluster placement.

Option C is the best choice because SAP HANA system replication across two Availability Zones requires extremely low latency and high throughput. Enhanced Networking (ENA) provides higher bandwidth, lower jitter, and lower per-packet processing overhead, which is essential for minimizing data loss. While a cluster placement group is confined to a single Availability Zone and cannot be used across AZs, its presence in option C is a common distractor. The key requirement is ENA, making C the only option that includes this critical feature. Options A, B, and D are not suitable: ClassicLink is deprecated and does not provide low-latency replication, VPN adds significant latency, and VPC peering is unnecessary when instances are in the same VPC (subnets in different AZs are already routable).

Key principle: Enhanced Networking (ENA)

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • ✗

    Use ClassicLink to connect the instances.

    Why it's wrong here

    ClassicLink is deprecated and not applicable for EC2-VPC.

  • ✗

    Set up a VPN connection between the instances.

    Why it's wrong here

    VPN adds latency and is not needed within the same region.

  • ✓

    Enable Enhanced Networking (ENA) and place the instances in a placement group with cluster placement.

    Why this is correct

    ENA provides higher bandwidth and lower jitter; cluster placement groups offer the lowest latency between instances, but cross-AZ still benefits from ENA.

    Clue confirmation

    The clue word "primary" in the question point toward this answer.

    Related concept

    Enhanced Networking (ENA)

  • ✗

    Configure VPC peering between the two subnets.

    Why it's wrong here

    VPC peering is used to connect different VPCs, not subnets within the same VPC.

Common exam traps

Common exam trap: answer the scenario, not the keyword

Candidates may think a cluster placement group is required for low latency, but it works only within a single AZ. The correct answer relies on Enhanced Networking (ENA) as the key enabler; the placement group reference tests whether you know its limitation.

Detailed technical explanation

How to think about this question

Enhanced Networking (ENA) uses SR-IOV (Single Root I/O Virtualization) to bypass the hypervisor for network traffic, achieving up to 100 Gbps throughput and sub-millisecond latency. Cluster placement groups are designed for low-latency, high-bandwidth workloads like HANA replication, as they place instances in a single rack or within a low-latency network segment, but note that they are limited to a single Availability Zone, so if the secondary is in a different AZ, a spread or partition placement group would be used instead; however, the question specifies two AZs, so a cluster placement group cannot span AZs, making this a subtle exam trap where candidates must recognize that cluster placement groups are single-AZ only, and the correct answer still holds because ENA is the primary enabler.

KKey Concepts to Remember

  • Enhanced Networking (ENA)
  • Cluster Placement Group
  • SAP HANA System Replication

TExam Day Tips

  • Watch for words such as best, first, most likely and least administrative effort.
  • Review why wrong options are wrong, not only why the correct option is correct.

Key takeaway

Enhanced Networking (ENA)

Real-world example

How this comes up in practice

An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.

Visual reference

192.168.1.0 /24 256 addresses (254 usable) 192.168.1.0 /25 Subnet A 128 addr (126 usable) 192.168.1.128 /25 Subnet B 128 addr (126 usable) Borrowing 1 bit from host portion creates 2 subnets (/25)

What to study next

Got this wrong? Here's your next step.

Review enhanced Networking (ENA), then practise related PAS-C01 questions on the same topic to reinforce the concept.

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FAQ

Questions learners often ask

What does this PAS-C01 question test?

Technology — This question tests Technology — Enhanced Networking (ENA).

What is the correct answer to this question?

The correct answer is: Enable Enhanced Networking (ENA) and place the instances in a placement group with cluster placement. — Option C is the best choice because SAP HANA system replication across two Availability Zones requires extremely low latency and high throughput. Enhanced Networking (ENA) provides higher bandwidth, lower jitter, and lower per-packet processing overhead, which is essential for minimizing data loss. While a cluster placement group is confined to a single Availability Zone and cannot be used across AZs, its presence in option C is a common distractor. The key requirement is ENA, making C the only option that includes this critical feature. Options A, B, and D are not suitable: ClassicLink is deprecated and does not provide low-latency replication, VPN adds significant latency, and VPC peering is unnecessary when instances are in the same VPC (subnets in different AZs are already routable).

What should I do if I get this PAS-C01 question wrong?

Review enhanced Networking (ENA), then practise related PAS-C01 questions on the same topic to reinforce the concept.

Are there clue words in this question I should notice?

Yes — watch for: "primary". Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.

What is the key concept behind this question?

Enhanced Networking (ENA)

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Last reviewed: Jul 4, 2026

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