- A
MySQL: 3306
MySQL's default port is 3306.
- B
PostgreSQL: 5432
PostgreSQL's default port is 5432.
- C
Oracle: 1521
Oracle database's default listener port is 1521.
- D
SQL Server: 1433
SQL Server's default port is 1433.
- E
MySQL: 5432
Why wrong: Incorrect — 5432 is the default port for PostgreSQL, not MySQL.
- F
PostgreSQL: 3306
Why wrong: Incorrect — 3306 is the default port for MySQL, not PostgreSQL.
Question 54 of 1,730
Default Ports for MySQL, PostgreSQL, Oracle, and SQL Server
This DBS-C01 practice question tests your understanding of deployment and migration. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
Match each database engine to its default port number.
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
✓
MySQL: 3306
The default ports are: MySQL on 3306, PostgreSQL on 5432, Oracle on 1521, and SQL Server on 1433. Common confusions include swapping MySQL and PostgreSQL ports.
Key principle: ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
MySQL: 3306
Why this is correct
MySQL's default port is 3306.
Related concept
Standard ACLs match source addresses.
- ✓
PostgreSQL: 5432
Why this is correct
PostgreSQL's default port is 5432.
Related concept
Standard ACLs match source addresses.
- ✓
Oracle: 1521
Why this is correct
Oracle database's default listener port is 1521.
Related concept
Standard ACLs match source addresses.
- ✓
SQL Server: 1433
Why this is correct
SQL Server's default port is 1433.
Related concept
Standard ACLs match source addresses.
- ✗
MySQL: 5432
Why it's wrong here
Incorrect — 5432 is the default port for PostgreSQL, not MySQL.
- ✗
PostgreSQL: 3306
Why it's wrong here
Incorrect — 3306 is the default port for MySQL, not PostgreSQL.
Common exam traps
Common exam trap: ACLs stop at the first match
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Detailed technical explanation
How to think about this question
ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.
KKey Concepts to Remember
- Standard ACLs match source addresses.
- Extended ACLs can match source, destination, protocol and ports.
- The first matching ACL entry is used.
- There is usually an implicit deny at the end.
TExam Day Tips
- Check inbound versus outbound direction.
- Read the ACL from top to bottom.
- Look for a broader permit or deny above the intended line.
Key takeaway
ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Real-world example
How this comes up in practice
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
Got this wrong? Here's your next step.
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related DBS-C01 ACL questions on filtering logic and placement.
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FAQ
Questions learners often ask
What does this DBS-C01 question test?
Deployment and Migration — This question tests Deployment and Migration — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: MySQL: 3306 — The default ports are: MySQL on 3306, PostgreSQL on 5432, Oracle on 1521, and SQL Server on 1433. Common confusions include swapping MySQL and PostgreSQL ports.
What should I do if I get this DBS-C01 question wrong?
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related DBS-C01 ACL questions on filtering logic and placement.
What is the key concept behind this question?
Standard ACLs match source addresses.
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Last reviewed: Jun 11, 2026
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