- A
Switch to asynchronous replication mode
Why wrong: Asynchronous replication may not be suitable for DR.
- B
Use Amazon RDS for HANA as the DR target instead of EC2
Why wrong: RDS does not support HANA DR replication via DRS.
- C
Increase the size of the staging area subnet
Why wrong: Staging area size does not affect replication speed.
- D
Increase the number of concurrent data streams in the DRS agent configuration
More streams can utilize available bandwidth better.
Question 860 of 1,733
PAS-C01 Migration Practice Question
This PAS-C01 practice question tests your understanding of migration. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. 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 organization is migrating their SAP ERP system to AWS and needs to set up a disaster recovery (DR) site in another AWS region. They want to use AWS Elastic Disaster Recovery (DRS) for SAP HANA. The source HANA system is running on-premises on a physical server. They have installed the DRS agent on the source server. During the initial replication, they notice that the data transfer is very slow. What should they do to improve replication speed?
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
✓
Increase the number of concurrent data streams in the DRS agent configuration
Option D is correct because AWS Elastic Disaster Recovery (DRS) allows configuring multiple concurrent data streams to increase network throughput and improve replication speed. Option A is incorrect because DRS already uses asynchronous replication by default; switching to asynchronous does not change the current mode. Option B is incorrect because Amazon RDS for HANA is a managed database service, not a DR target for DRS; DRS replicates to EC2 instances. Option C is incorrect because the staging area subnet size affects storage capacity, not replication speed.
Key principle: OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Switch to asynchronous replication mode
Why it's wrong here
Asynchronous replication may not be suitable for DR.
- ✗
Use Amazon RDS for HANA as the DR target instead of EC2
Why it's wrong here
RDS does not support HANA DR replication via DRS.
- ✗
Increase the size of the staging area subnet
Why it's wrong here
Staging area size does not affect replication speed.
- ✓
Increase the number of concurrent data streams in the DRS agent configuration
Why this is correct
More streams can utilize available bandwidth better.
Related concept
OSPF neighbours must agree on key parameters.
Common exam traps
Common exam trap: OSPF can fail even when IP connectivity looks correct
OSPF neighbour formation depends on matching areas, timers, network type, authentication and passive-interface behaviour. Do not choose an answer only because the devices can ping.
Detailed technical explanation
How to think about this question
OSPF questions usually test the details that control adjacency and route selection. Read the neighbour state, area, router ID and interface configuration before deciding what is wrong.
KKey Concepts to Remember
- OSPF neighbours must agree on key parameters.
- Router ID selection can affect neighbour relationships and LSDB output.
- OSPF cost influences the preferred path.
- A route can appear in OSPF information but not become the installed route.
TExam Day Tips
- Check area mismatch first when OSPF adjacency fails.
- Review passive interfaces when a network is advertised but no neighbour forms.
- Use show ip ospf neighbor and show ip route clues carefully.
Key takeaway
OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
Visual reference
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
What to study next
Got this wrong? Here's your next step.
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related PAS-C01 OSPF questions on adjacency and route selection.
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FAQ
Questions learners often ask
What does this PAS-C01 question test?
Migration — This question tests Migration — OSPF neighbours must agree on key parameters..
What is the correct answer to this question?
The correct answer is: Increase the number of concurrent data streams in the DRS agent configuration — Option D is correct because AWS Elastic Disaster Recovery (DRS) allows configuring multiple concurrent data streams to increase network throughput and improve replication speed. Option A is incorrect because DRS already uses asynchronous replication by default; switching to asynchronous does not change the current mode. Option B is incorrect because Amazon RDS for HANA is a managed database service, not a DR target for DRS; DRS replicates to EC2 instances. Option C is incorrect because the staging area subnet size affects storage capacity, not replication speed.
What should I do if I get this PAS-C01 question wrong?
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related PAS-C01 OSPF questions on adjacency and route selection.
What is the key concept behind this question?
OSPF neighbours must agree on key parameters.
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Last reviewed: Jun 20, 2026
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