The answer is that the configuration lacks any access list to restrict SNMP access, which is the primary mistake. While having multiple read-write communities like "private" and "secret" is technically allowed, it introduces unnecessary security risk; however, the critical flaw is that without an access list applied to any of the snmp-server community statements, SNMPv2c traffic is accepted from any source IP address. On the Cisco CCNP ENARSI 300-410 exam, this tests your understanding that SNMPv2c community strings are essentially passwords sent in plaintext, and without ACL-based source filtering, the device is exposed to unauthorized read or write operations from the entire network. A common trap is focusing only on the duplication of RW communities and missing the missing ACL, so always check for the access-list keyword after the community string. Memory tip: “No ACL, no control — SNMP is open to all.”
300-410 SNMP Troubleshooting Practice Question
This 300-410 practice question tests your understanding of snmp troubleshooting. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
snmp-server community public RO\nsnmp-server community private RW\nsnmp-server community secret RW
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
There is no access list to restrict SNMP access.
Multiple read-write communities are configured (private and secret). While this is allowed, it can be a security risk. More importantly, the 'public' community is read-only, which is typical, but the configuration lacks any access list restrictions, making SNMP accessible from any source if not filtered elsewhere.
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.
✓
There is no access list to restrict SNMP access.
Why this is correct
Without an ACL, any host can query the device using these community strings, which is a security concern.
Related concept
Standard ACLs match source addresses.
✗
The community strings must be at least 8 characters.
Why it's wrong here
There is no such requirement.
✗
Only one read-write community is allowed.
Why it's wrong here
Multiple read-write communities are permitted.
✗
The 'public' community should be read-write.
Why it's wrong here
It is common to have a read-only 'public' community.
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 practitioner preparing for the 300-410 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. 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 exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 300-410 question in full detail.
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 300-410 ACL questions on filtering logic and placement.
SNMP Troubleshooting — This question tests SNMP Troubleshooting — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: There is no access list to restrict SNMP access. — Multiple read-write communities are configured (private and secret). While this is allowed, it can be a security risk. More importantly, the 'public' community is read-only, which is typical, but the configuration lacks any access list restrictions, making SNMP accessible from any source if not filtered elsewhere.
What should I do if I get this 300-410 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 300-410 ACL questions on filtering logic and placement.
What is the key concept behind this question?
Standard ACLs match source addresses.
About these practice questions
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These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. snmp-server community public RO\nsnmp-server community private RW\nsnmp-server location DataCenter\nsnmp-server contact admin@example.com
What is the effect of this configuration?
medium
A.SNMPv3 is enabled with authentication.
✓ B.SNMPv2c is enabled with read-only community 'public' and read-write community 'private'.
C.Only read-only access is allowed using the 'private' community.
D.SNMP traps are enabled to the location DataCenter.
Why B: The configuration enables SNMPv2c with two community strings: public for read-only access and private for read-write access. It also sets the location and contact information for the device.
Variation 2. snmp-server community MyCommunity RO 10\naccess-list 10 permit 192.168.1.0 0.0.0.255
What is the effect of this configuration?
medium
✓ A.SNMP read-only access is allowed only from the 192.168.1.0/24 subnet.
B.SNMP read-write access is allowed from any host.
C.SNMP access is allowed from any host, but only read-only.
D.The community string is encrypted in the configuration.
Why A: The SNMP community 'MyCommunity' is restricted to read-only access and is associated with access-list 10, which permits only the 192.168.1.0/24 subnet. This means only SNMP managers in that subnet can use this community for read-only queries.
Last reviewed: Jun 18, 2026
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