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← ACLs and CoPP practice sets

CCNP ACLs and CoPP • Complete Question Bank

CCNP ACLs and CoPP — All Questions With Answers

Complete CCNP ACLs and CoPP question bank — all 0 questions with answers and detailed explanations.

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Certifications/CCNP/Practice Test/ACLs and CoPP/All Questions
Question 1mediummultiple choice
Study the full ACL explanation →

A network engineer is troubleshooting an issue where SSH access to a Cisco router from a specific management subnet (10.10.10.0/24) is intermittently failing. The router has a CoPP policy applied to the control plane. The engineer checks the CoPP statistics and sees that packets from the management subnet are being dropped by the control-plane service-policy. Which configuration change should the engineer make to allow SSH from the management subnet while still protecting the control plane?

Question 2mediummultiple choice
Study the full ACL explanation →

An enterprise network uses a Cisco Catalyst 9300 switch as a distribution layer device. The network team notices that ICMP echo requests from a monitoring server (192.168.1.100) to the switch's management IP are being dropped intermittently. The switch has a CoPP policy that includes a class-map matching ICMP traffic. The engineer checks the CoPP statistics and sees that ICMP packets from the monitoring server are being dropped by the policy. What is the most likely cause of this issue?

Question 3hardmultiple choice
Open the full BGP breakdown →

A network engineer is configuring CoPP on a Cisco ASR 1000 router to protect the control plane from excessive traffic. The engineer wants to allow BGP traffic from a specific peer (10.0.0.1) while rate-limiting all other BGP traffic. The engineer creates an ACL that permits TCP port 179 from host 10.0.0.1 and denies all other BGP traffic. The CoPP class-map matches this ACL. However, after applying the policy, BGP sessions from other peers are still being established. What is the most likely reason?

Question 4easymultiple choice
Open the full VLAN trunking answer →

A network engineer is troubleshooting a connectivity issue between two VLANs on a Cisco Catalyst 3850 switch. The switch has an ACL applied to VLAN 10 that permits traffic from VLAN 20 to VLAN 10, but denies all other traffic. Hosts in VLAN 20 can ping hosts in VLAN 10, but not vice versa. The engineer checks the ACL and finds that it is applied inbound on VLAN 10. What is the most likely cause of the issue?

Question 5hardmultiple choice
Study the full ACL explanation →

A network engineer is configuring CoPP on a Cisco Nexus 9000 switch to protect the control plane from a potential DoS attack. The engineer creates a class-map that matches traffic with a specific DSCP value (AF41) and applies a police rate of 10 Mbps. After applying the policy, the engineer notices that legitimate traffic with DSCP AF41 is being dropped even though the traffic rate is only 5 Mbps. What is the most likely cause?

Question 6mediummultiple choice
Study the full ACL explanation →

A network engineer is troubleshooting an issue where a Cisco router is not responding to SNMP polls from a network management station (NMS) at 192.168.1.50. The router has a CoPP policy that includes a class-map matching SNMP traffic (UDP port 161). The engineer checks the CoPP statistics and sees that SNMP packets from the NMS are being dropped. The engineer wants to allow SNMP from the NMS while still protecting the control plane. Which configuration change should the engineer make?

Question 7easymultiple choice
Study the full ACL explanation →

A network engineer is configuring ACLs on a Cisco router to filter traffic between two subnets. The engineer wants to allow HTTP traffic from subnet 10.1.1.0/24 to subnet 10.2.2.0/24, but deny all other traffic. The engineer applies an ACL inbound on the interface connected to subnet 10.1.1.0/24. The ACL has a permit statement for TCP port 80 from 10.1.1.0/24 to 10.2.2.0/24, followed by a deny ip any any. However, hosts in subnet 10.1.1.0/24 can still ping hosts in subnet 10.2.2.0/24. What is the most likely reason?

Question 8hardmultiple choice
Study the full ACL explanation →

A network engineer is configuring CoPP on a Cisco router to protect the control plane from excessive traffic. The engineer creates a class-map that matches traffic with a specific ACL that permits TCP port 22 (SSH) from a management subnet (192.168.1.0/24) and denies all other traffic. The CoPP policy applies a police rate of 1 Mbps to this class. After applying the policy, the engineer notices that SSH sessions from the management subnet are being dropped intermittently. The engineer checks the CoPP statistics and sees that the traffic rate is 500 kbps. What is the most likely cause?

Question 9easymultiple choice
Open the full VLAN trunking answer →

A network engineer is troubleshooting an issue where a Cisco router is not forwarding traffic between two VLANs. The router has an ACL applied to the subinterface for VLAN 100 that permits traffic from VLAN 200 to VLAN 100, but denies all other traffic. Hosts in VLAN 200 can ping hosts in VLAN 100, but hosts in VLAN 100 cannot ping hosts in VLAN 200. The engineer checks the ACL and finds that it is applied inbound on the subinterface for VLAN 100. What is the most likely cause of the issue?

Question 10mediummultiple choice
Study the full ACL explanation →

A network engineer runs the following command on Router R1:

R1# show access-lists

Extended IP access list 101

10 permit tcp host 10.1.1.1 host 192.168.1.100 eq 80 (4 matches)
    
20 deny tcp any host 192.168.1.100 eq 80 (12 matches)
    
30 permit ip any any (8 matches)

Based on this output, what can be concluded?

Question 11hardmultiple choice
Study the full ACL explanation →

A network engineer runs the following command on Router R1:

R1# show policy-map control-plane

Control Plane

Service-policy input: CoPP-POLICY

Class-map: ICMP-CLASS (match-all) 10 packets, 1000 bytes 5 minute offered rate 0 bps Match: access-group name ICMP-ACL police: cir 8000 bps, bc 1500 bytes, be 1500 bytes conformed 10 packets, 1000 bytes; actions: transmit exceeded 0 packets, 0 bytes; actions: drop violated 0 packets, 0 bytes; actions: drop

Class-map: SSH-CLASS (match-all) 5 packets, 500 bytes 5 minute offered rate 0 bps Match: access-group name SSH-ACL police: cir 16000 bps, bc 3000 bytes, be 3000 bytes conformed 5 packets, 500 bytes; actions: transmit exceeded 0 packets, 0 bytes; actions: drop violated 0 packets, 0 bytes; actions: drop

Class-map: class-default (match-any) 20 packets, 2000 bytes 5 minute offered rate 0 bps Match: any police: cir 64000 bps, bc 8000 bytes, be 8000 bytes conformed 20 packets, 2000 bytes; actions: transmit exceeded 0 packets, 0 bytes; actions: drop violated 0 packets, 0 bytes; actions: drop

Based on this output, what can be concluded?

Question 12mediummultiple choice
Study the full ACL explanation →

A network engineer runs the following command on Router R1:

R1# show ip interface GigabitEthernet0/0 | include access list

Inbound access list is 101 Outbound access list is not set

R1# show access-lists 101

Extended IP access list 101

10 permit tcp 192.168.1.0 0.0.0.255 any eq 80 (100 matches)
    
20 deny tcp any any eq 80 (50 matches)
    
30 permit ip any any (200 matches)

Based on this output, what can be concluded?

Question 13mediummultiple choice
Study the full ACL explanation →

A network engineer runs the following command on Router R1:

R1# show ip access-lists

Extended IP access list 120

10 permit tcp 10.0.0.0 0.255.255.255 any eq 22 (5 matches)
    
20 permit tcp 172.16.0.0 0.0.255.255 any eq 22 (3 matches)
    
30 deny tcp any any eq 22 (2 matches)
    
40 permit ip any any (10 matches)

Based on this output, what can be concluded?

Question 14mediummultiple choice
Study the full ACL explanation →

A network engineer runs the following command on Router R1:

R1# show access-lists 130

Extended IP access list 130

10 permit icmp host 10.1.1.1 any echo (8 matches)
    
20 permit icmp host 10.1.1.1 any echo-reply (5 matches)
    
30 deny icmp any any (3 matches)
    
40 permit ip any any (12 matches)

Based on this output, what can be concluded?

Question 15hardmultiple choice
Study the full ACL explanation →

A network engineer runs the following command on Router R1:

R1# show policy-map control-plane

Control Plane

Service-policy input: CoPP-POLICY

Class-map: MGMT-CLASS (match-all) 100 packets, 5000 bytes 5 minute offered rate 1000 bps Match: access-group name MGMT-ACL police: cir 32000 bps, bc 4000 bytes, be 4000 bytes conformed 80 packets, 4000 bytes; actions: transmit exceeded 15 packets, 750 bytes; actions: drop violated 5 packets, 250 bytes; actions: drop

Class-map: class-default (match-any) 200 packets, 10000 bytes 5 minute offered rate 2000 bps Match: any police: cir 64000 bps, bc 8000 bytes, be 8000 bytes conformed 200 packets, 10000 bytes; actions: transmit exceeded 0 packets, 0 bytes; actions: drop violated 0 packets, 0 bytes; actions: drop

Based on this output, what can be concluded?

Question 16mediummultiple choice
Study the full ACL explanation →

A network engineer runs the following command on Router R1:

R1# show ip interface GigabitEthernet0/1 | include access list

Inbound access list is not set Outbound access list is 140

R1# show access-lists 140

Extended IP access list 140

10 permit tcp 192.168.1.0 0.0.0.255 any eq 443 (25 matches)
    
20 deny tcp any any eq 443 (10 matches)
    
30 permit ip any any (50 matches)

Based on this output, what can be concluded?

Question 17hardmultiple choice
Study the full ACL explanation →

A network engineer runs the following command on Router R1:

R1# show ip access-lists

Extended IP access list 150

10 permit tcp 10.0.0.0 0.255.255.255 any eq 23 (2 matches)
    
20 deny tcp any any eq 23 (8 matches)
    
30 permit tcp 172.16.0.0 0.0.255.255 any eq 22 (4 matches)
    
40 deny tcp any any eq 22 (1 match)
    
50 permit ip any any (15 matches)

Based on this output, what can be concluded?

Question 18hardmultiple choice
Open the full BGP breakdown →

A network engineer runs the following command on Router R1:

R1# show policy-map control-plane

Control Plane

Service-policy input: CoPP-POLICY

Class-map: BGP-CLASS (match-all) 50 packets, 2500 bytes 5 minute offered rate 500 bps Match: access-group name BGP-ACL police: cir 64000 bps, bc 8000 bytes, be 8000 bytes conformed 50 packets, 2500 bytes; actions: transmit exceeded 0 packets, 0 bytes; actions: drop violated 0 packets, 0 bytes; actions: drop

Class-map: SNMP-CLASS (match-all) 200 packets, 10000 bytes 5 minute offered rate 2000 bps Match: access-group name SNMP-ACL police: cir 16000 bps, bc 2000 bytes, be 2000 bytes conformed 150 packets, 7500 bytes; actions: transmit exceeded 40 packets, 2000 bytes; actions: drop violated 10 packets, 500 bytes; actions: drop

Class-map: class-default (match-any) 100 packets, 5000 bytes 5 minute offered rate 1000 bps Match: any police: cir 32000 bps, bc 4000 bytes, be 4000 bytes conformed 100 packets, 5000 bytes; actions: transmit exceeded 0 packets, 0 bytes; actions: drop violated 0 packets, 0 bytes; actions: drop

Based on this output, what can be concluded?

Question 19mediummultiple choice
Study the full ACL explanation →

Examine the following configuration snippet:

interface GigabitEthernet0/1
 ip access-group FILTER_IN in

!

ip access-list extended FILTER_IN
 deny   icmp any any echo
 permit ip any any

What is the effect of this configuration?

Question 20mediummultiple choice
Study the full ACL explanation →

Consider the following configuration:

ip access-list extended BLOCK_TELNET
 deny tcp any any eq 23
 permit ip any any

!

interface GigabitEthernet0/2
 ip access-group BLOCK_TELNET out

Which statement is true?

Question 21mediummultiple choice
Study the full ACL explanation →

Given the following CoPP configuration:

class-map match-all COPP_ICMP match access-group name ICMP_ACL ! policy-map COPP_POLICY

class COPP_ICMP

police 8000 conform-action transmit exceed-action drop ! control-plane service-policy input COPP_POLICY

What is the effect?

Question 22mediummultiple choice
Study the full ACL explanation →

Review the ACL configuration:

ip access-list extended TEST
 permit tcp 192.168.1.0 0.0.0.255 any eq 80
 permit tcp 192.168.1.0 0.0.0.255 any eq

443

deny ip any any

!

interface GigabitEthernet0/3
 ip access-group TEST in

What is missing or incorrect?

Question 23mediummultiple choice
Study the full ACL explanation →

Examine the CoPP configuration:

class-map match-any COPP_SSH match access-group name SSH_ACL ! policy-map COPP_POLICY

class COPP_SSH

police 10000 conform-action transmit exceed-action drop

class class-default

police 5000 conform-action transmit exceed-action drop ! control-plane service-policy input COPP_POLICY

Which statement is true?

Question 24mediummultiple choice
Study the full ACL explanation →

Given the following configuration:

ip access-list extended FILTER
 permit tcp any host 10.1.1.1 eq 22
 permit icmp any any echo-reply

!

interface GigabitEthernet0/4
 ip access-group FILTER in

What traffic is permitted?

Question 25easymultiple choice
Review the full OSPF breakdown →

What is the default OSPF hello interval on a broadcast multi-access network (e.g., Ethernet)?

Question 26mediummultiple choice
Open the full BGP breakdown →

Which BGP attribute is preferred when it has the lowest value?

Question 27easymultiple choice
Study the full EIGRP explanation →

What is the maximum hop count for EIGRP?

Question 28mediumdrag order
Study the full ACL explanation →

Drag and drop the steps of CoPP policy evaluation order into the correct order, from first to last.

Question 29mediumdrag order
Study the full ACL explanation →

Drag and drop the steps of deploying a CoPP policy on a Cisco IOS-XE router into the correct order, from first to last.

Question 30mediumdrag order
Study the full ACL explanation →

Drag and drop the steps of configuring a standard ACL for traffic filtering on a Cisco IOS router into the correct order, from first to last.

Question 31mediumdrag order
Study the full ACL explanation →

Drag and drop the steps of IPv6 ACL configuration and application into the correct order, from first to last.

Question 32mediumdrag order
Study the full ACL explanation →

Drag and drop the steps of ACL reflexive access list (dynamic inspection) flow into the correct order, from first to last.

Question 33mediumdrag order
Study the full ACL explanation →

Drag and drop the steps of named ACL modification using sequence numbers into the correct order, from first to last.

Question 34mediumdrag order
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Drag and drop the steps of uRPF (Unicast Reverse Path Forwarding) verification into the correct order, from first to last.

Question 35mediumdrag order
Study the full ACL explanation →

Drag and drop the steps of CoPP class-map match criteria and rate-limit application into the correct order, from first to last.

Question 36mediumdrag order
Study the full ACL explanation →

Drag and drop the steps of IPv6 ACL configuration and application into the correct order, from first to last.

Question 37mediumdrag order
Study the full ACL explanation →

Drag and drop the steps of ACL reflexive access list (dynamic inspection) flow into the correct order, from first to last.

Question 38mediumdrag order
Study the full ACL explanation →

Drag and drop the steps of named ACL modification using sequence numbers into the correct order, from first to last.

Question 39mediumdrag order
Study the full ACL explanation →

Drag and drop the steps of uRPF (Unicast Reverse Path Forwarding) verification into the correct order, from first to last.

Question 40mediumdrag order
Study the full ACL explanation →

Drag and drop the steps of CoPP class-map match criteria and rate-limit application into the correct order, from first to last.

Question 41mediummatching
Study the full ACL explanation →

Drag and drop each ACL type on the left to its matching capability on the right.

Question 42easymatching
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Drag and drop each protocol number on the left to its matching protocol on the right.

Question 43hardmatching
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Drag and drop each CoPP class on the left to its matching traffic type on the right.

Question 44mediummatching
Study the full ACL explanation →

Drag and drop each ACL action on the left to its matching result on the right.

Question 45hardmatching
Study the full ACL explanation →

Drag and drop each IPv6 ACL feature on the left to its matching IPv4 equivalent on the right.

Question 46mediummatching
Study the full ACL explanation →

Drag and drop each ACL type on the left to its matching capability on the right.

Question 47easymatching
Study the full ACL explanation →

Drag and drop each protocol number on the left to its matching protocol on the right.

Question 48mediummatching
Study the full ACL explanation →

Drag and drop each CoPP class on the left to its matching traffic type on the right.

Question 49easymatching
Study the full ACL explanation →

Drag and drop each ACL action on the left to its matching result on the right.

Question 50hardmatching
Study the full ACL explanation →

Drag and drop each IPv6 ACL feature on the left to its matching IPv4 ACL equivalent on the right.

Question 51mediummulti select
Study the full ACL explanation →

Which two statements about Control Plane Policing (CoPP) are true? (Choose two.)

Question 52hardmulti select
Study the full ACL explanation →

Which three statements about extended ACLs on Cisco IOS are true? (Choose three.)

Question 53easymulti select
Study the full ACL explanation →

Which two statements about the 'ip access-group' command are true? (Choose two.)

Question 54hardmulti select
Study the full ACL explanation →

Which three statements about CoPP configuration and operation are true? (Choose three.)

Question 55mediummulti select
Study the full ACL explanation →

Which two statements about Control Plane Policing (CoPP) are true? (Choose two.)

Question 56hardmulti select
Study the full ACL explanation →

Which three statements about IPv4 ACLs on Cisco IOS are true? (Choose three.)

Question 57hardmulti select
Study the full ACL explanation →

Which two statements about the interaction between ACLs and CoPP are true? (Choose two.)

Question 58easymulti select
Study the full ACL explanation →

Which three statements about named ACLs and their configuration are true? (Choose three.)

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