mediumMultiple ChoiceObjective-mapped
300-410 Practice Question: Analyze the following partial configuration:…
Analyze the following partial configuration:
access-list 101 permit tcp any any eq 179 access-list 101 permit udp any any eq 646 access-list 101 permit ospf any any
! class-map match-all COPP-BGP match access-group 101 ! policy-map COPP-POLICY
class COPP-BGP
police 48000 conform-action transmit exceed-action drop
class class-default
police 128000 conform-action transmit exceed-action drop !
interface GigabitEthernet0/0 ip address 192.168.1.1 255.255.255.0
! control-plane service-policy input COPP-POLICY
Which statement is true?
⚠ Common exam trap
Cisco often tests the misconception that 'match-all' in a class-map requires all protocols in the ACL to be matched simultaneously, but in reality, 'match-all' applies to the match statements within the class-map, not to the individual entries within the referenced ACL.
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
✓
The ACL matches OSPF, BGP, and LDP traffic, and all are rate-limited to 48000 bps.
The ACL permits TCP port 179 (BGP), UDP port 646 (LDP), and OSPF (protocol 89). The class-map COPP-BGP matches all three protocols via the match-all keyword, and the policy-map applies a police rate of 48000 bps to this class. Since the policy is applied to the control-plane input, all matched traffic (BGP, LDP, OSPF) is rate-limited to 48000 bps.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The ACL matches OSPF, BGP, and LDP traffic, and all are rate-limited to 48000 bps.
Why this is correct
Correct. The ACL permits OSPF (protocol 89), BGP (TCP 179), and LDP (UDP 646). The class-map matches all three and applies the 48000 bps policer.
- ✗
The ACL is missing 'permit eigrp any any' to include EIGRP traffic.
Why it's wrong here
Incorrect. EIGRP is not required; the configuration is valid as is.
- ✗
The class-map must use 'match-all' to match all protocols simultaneously, but the ACL uses 'permit' which is OR logic, so the class-map will not work.
Why it's wrong here
Incorrect. The ACL uses permit statements with OR logic; the class-map match-all means all match conditions must be met, but since there is only one match condition (the ACL), it works fine.
- ✗
The policy-map should be applied to the interface, not the control-plane.
Why it's wrong here
Incorrect. CoPP is applied to the control-plane, not to interfaces. Interface-level policing would be different.
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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