easyMultiple ChoiceObjective-mapped
300-410 Practice Question: Runs the following command on Router R1: R1# show…
A network engineer runs the following command on Router R1:
R1# show policy-map control-plane
Control Plane
Service-policy input: CoPP-IN
Class-map: CoPP-OSPF (match-all) 1000 packets, 60000 bytes 5 minute offered rate 2000 bps, drop rate 0000 bps Match: access-group 140 police: cir 64000 bps, bc 12000 bytes, be 12000 bytes conformed 1000 packets, 60000 bytes; actions: transmit exceeded 0 packets, 0 bytes; actions: drop violated 0 packets, 0 bytes; actions: drop
Based on this output, which statement is correct?
⚠ Common exam trap
Cisco often tests the interpretation of the 'conformed', 'exceeded', and 'violated' counters in police output, where candidates mistakenly assume that any policing configuration implies drops are occurring, even when the counters show zero drops.
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
✓
OSPF traffic is being transmitted without any drops.
The output shows that under the CoPP-OSPF class, 1000 packets have been conformed and transmitted, with zero exceeded or violated packets. This means all OSPF traffic matched by access-group 140 has been within the police rate of 64000 bps, so no packets have been dropped. Therefore, OSPF traffic is being transmitted without any drops.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
OSPF packets are being dropped due to exceeding the police rate.
Why it's wrong here
The exceeded and violated counters are zero.
- ✓
OSPF traffic is being transmitted without any drops.
Why this is correct
All packets are conforming and being transmitted.
- ✗
The police rate is set to 32000 bps.
Why it's wrong here
The CIR is 64000 bps.
- ✗
The class-default is matching OSPF traffic.
Why it's wrong here
OSPF traffic is matched by the CoPP-OSPF class.
Visual reference
Quick reference
Routing Protocol Comparison
| Protocol | Metric | Max Hops | Algorithm | Type |
|---|---|---|---|---|
| RIP v2 | Hop count | 15 | Bellman-Ford | Distance vector |
| OSPF | Cost (bandwidth) | Unlimited | Dijkstra (SPF) | Link state |
| EIGRP | Composite metric | Unlimited | DUAL | Hybrid |
| IS-IS | Cost | Unlimited | Dijkstra | Link state |
| BGP | Policy / attributes | Unlimited | Path vector | Path vector |
RIP's 15-hop limit makes it unsuitable for large networks. OSPF and EIGRP dominate modern enterprise deployments.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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