CCNA Switching and Network Access Practice Test 19 — 15 Questions

Question 1

You are connected to R1. The network uses a router-on-a-stick design with a single switch (SW1) and two VLANs (10 and 20). Currently, hosts in VLAN 10 cannot ping hosts in VLAN 20, and the trunk between R1 and SW1 shows a native VLAN mismatch. Examine the provided configuration and output, then apply the necessary corrections to R1 so that inter-VLAN routing works correctly.

Accepted Answer

Change the native VLAN on R1's trunk interface to 99, correct the encapsulation on G0/0.20 to dot1Q 20, and enable IP routing globally.. The configuration has three issues: 1) The native VLAN on the trunk is VLAN 1, but the switch expects VLAN 99 (common mismatch scenario). 2) Subinterface G0/0.20 uses encapsulation dot1Q 10 instead of 20, causing VLAN 20 traffic to be mis-tagged. 3) The 'ip routing' command is missing globally, so R1 cannot route between subinterfaces. To fix, configure the main interface G0/0 with 'encapsulation dot1Q 99 native' to set the native VLAN to 99, correct the encapsulation on G0/0.20 to 'dot1Q 20', and enable IP routing with 'ip routing'.

Answer

Change the native VLAN on R1's trunk interface to 99, correct the encapsulation on G0/0.20 to dot1Q 20, but do not enable IP routing because it is enabled by default.

Answer

Change the native VLAN on R1's trunk interface to 1, correct the encapsulation on G0/0.20 to dot1Q 20, and enable IP routing globally.

Answer

Change the native VLAN on R1's trunk interface to 99, correct the encapsulation on G0/0.10 to dot1Q 10, and enable IP routing globally.

Question 2

You are connected to R1. Configure R1 and SW1 so that hosts in VLAN 10 (192.168.10.0/24) and VLAN 20 (192.168.20.0/24) can communicate via the router-on-a-stick setup. The current configuration has errors: the trunk port between SW1 and R1 has a native VLAN mismatch, VLAN 30 is not allowed on the trunk, and the subinterface encapsulation is incorrect. Correct these issues and enable inter-VLAN routing.

Accepted Answer

On R1, configure interface GigabitEthernet0/0.30 with encapsulation dot1Q 99 native; on SW1, allow VLAN 30 on the trunk interface.. The native VLAN on SW1 is 99 but R1's physical interface defaults to VLAN 1, causing a mismatch. To fix this, R1's subinterface Gi0/0.30 must be set with encapsulation dot1Q 99 native, making R1's native VLAN 99 and matching SW1. VLAN 30 is not allowed on the trunk, preventing any traffic in that VLAN; it must be added to the trunk's allowed list on SW1. After these corrections, inter-VLAN routing for VLANs 10 and 20 will function correctly.

Answer

On R1, configure interface GigabitEthernet0/0.30 with encapsulation dot1Q 30; on SW1, remove VLAN 30 from the trunk allowed list.

Answer

On R1, configure interface GigabitEthernet0/0.30 with encapsulation dot1Q 30; on SW1, set the native VLAN to 1 on the trunk.

Answer

On R1, configure interface GigabitEthernet0/0.30 with encapsulation dot1Q 30; on SW1, configure the trunk to allow only VLANs 10 and 20.

Question 3

You are troubleshooting inter-VLAN routing on a router-on-a-stick setup. R1 is connected to SW1 via trunk port G0/0. VLANs 10, 20, and 30 exist on SW1, and R1 should route between them. Currently, hosts in VLAN 10 can communicate with VLAN 20 but cannot reach VLAN 30. Review the provided configuration and fix the issue.

Accepted Answer

Change the encapsulation on subinterface G0/0.30 to dot1Q 30 and reapply the IP address.. The subinterface for VLAN 30 (G0/0.30) is misconfigured with encapsulation dot1Q 100 instead of dot1Q 30, so R1 cannot forward packets to VLAN 30. VLAN 20 is correctly set up, which is why VLAN 10-to-VLAN 20 pings succeed. Changing the encapsulation to dot1Q 30 and reapplying the IP address restores full inter-VLAN routing. IP routing is enabled by default, so no additional command is needed; the native VLAN does not require a subinterface because no hosts are in that VLAN.

Answer

Add a subinterface for native VLAN 1 on R1 and assign an IP address.

Answer

Enable IP routing on R1 with the 'ip routing' command.

Answer

Change the allowed VLAN list on the trunk to include VLAN 30.

Question 4

You are connected to R1. The network consists of R1, SW1, and two hosts (Host-A on VLAN 10, Host-B on VLAN 20). SW1 has two access ports (one per VLAN) and a trunk to R1. Configure R1 for router-on-a-stick inter-VLAN routing. The current configuration has a native VLAN mismatch and a missing subinterface for VLAN 20. Fix these issues so that Host-A and Host-B can ping each other.

Accepted Answer

Configure interface G0/0.20 with encapsulation dot1Q 20 and IP address 192.168.20.1 255.255.255.0, set native VLAN to 1 on the trunk, and enable ip routing.. The native VLAN mismatch exists: R1 expects native VLAN 99, but SW1 likely uses native VLAN 1 (default). This causes CDP/STP issues but not directly inter-VLAN routing; however, for proper operation, set native VLAN to 1 on R1. Additionally, the subinterface for VLAN 20 is missing, so traffic from VLAN 20 cannot be routed. Finally, 'ip routing' is disabled, preventing any inter-VLAN routing. Solution: change native VLAN on trunk to 1, create subinterface G0/0.20 with encapsulation dot1Q 20 and IP 192.168.20.1/24, and enable ip routing.

Answer

Configure interface G0/0.20 with encapsulation dot1Q 20 and IP address 192.168.20.1 255.255.255.0, set native VLAN to 99 on the trunk, and enable ip routing.

Answer

Configure interface G0/0.20 with encapsulation dot1Q 20 and IP address 192.168.20.1 255.255.255.0, set native VLAN to 1 on the trunk, but do not enable ip routing.

Answer

Configure interface G0/0.20 with encapsulation dot1Q 20 and IP address 192.168.20.1 255.255.255.0, set native VLAN to 99 on the trunk, and do not enable ip routing.

Question 5

You are connected to R1 via console. R1 is a router-on-a-stick connecting VLAN 10 and VLAN 20 on a single link to switch SW1. Currently, hosts in VLAN 10 cannot ping hosts in VLAN 20, and some VLAN 10 hosts report intermittent connectivity. Examine the provided configuration and output, then fix all issues to restore full inter-VLAN routing and stable trunk operation.

Accepted Answer

On R1, configure 'ip routing', add subinterface G0/0.99 with 'encapsulation dot1Q 99 native' and an IP address, and ensure G0/0 is not shutdown.. Three issues prevent inter-VLAN routing and cause intermittent connectivity. First, R1 lacks a subinterface configured for the native VLAN (VLAN 99) with the 'encapsulation dot1Q 99 native' command; this subinterface is needed because SW1 expects the native VLAN to be tagged on the router side for consistency. Second, the global command 'ip routing' is missing, which disables routing between VLANs. Third, the physical interface GigabitEthernet0/0 might be administratively down; ensure 'no shutdown' is applied. Option A correctly fixes all issues: it adds the native VLAN subinterface, enables routing, and ensures the interface is up. The other options fail because they either misconfigure the native VLAN encapsulation on the wrong subinterface or apply an IP address to the physical interface (which does not support routing on a router-on-a-stick).

Answer

On R1, configure 'ip routing' and change the encapsulation on the VLAN 10 subinterface to 'encapsulation dot1Q 10 native'.

Answer

On R1, configure 'ip routing' and add an IP address to the physical interface GigabitEthernet0/0.

Answer

On R1, configure 'ip routing' and change the encapsulation on the VLAN 20 subinterface to 'encapsulation dot1Q 20 native'.

Question 6

You are connected to R1. The network has two VLANs (10 and 20) on SW1, connected to R1 via a trunk. Currently, hosts in VLAN 10 cannot reach the router or each other across VLANs. Configure R1 with the correct subinterface encapsulation and IP addressing, and ensure the trunk on SW1 allows both VLANs. Also, fix any native VLAN mismatch on the trunk link. Which configuration steps will resolve the issues?

Accepted Answer

On R1, configure subinterface Gi0/0.1 with encapsulation dot1Q 1 native and IP 192.168.1.1/24, and enable ip routing. On SW1, ensure trunk Gi0/1 allows VLANs 10,20 and set native VLAN 1.. The current issue is a native VLAN mismatch and missing IP routing. SW1's trunk port Gi0/1 uses native VLAN 1, sending untagged frames for VLAN 1. R1 has subinterfaces for VLANs 10 and 20 but no subinterface handling untagged native traffic, causing VLAN 10 traffic (if it were tagged) to reach R1 but native traffic to be dropped. Additionally, IP routing is not enabled, preventing inter‑VLAN forwarding even if subinterfaces are correctly addressed. Option A resolves both problems by adding a subinterface dot1Q 1 native with an IP address, enabling IP routing, and ensuring the trunk allows VLANs 10 and 20 with native VLAN 1. Option B creates subinterfaces for VLANs 10 and 20 but changes the switch native VLAN to 10 without a matching native subinterface on R1, so untagged VLAN 10 traffic still fails. Option C incorrectly uses 'encapsulation dot1Q 1' without the native keyword, so it expects tagged VLAN 1 frames, which do not match the switch's untagged native traffic. Option D changes the native VLAN to 10 on both sides, but this requires modifying the existing VLAN design; moreover, it does not guarantee that hosts in VLAN 10 will be able to reach the router if they are using IP 192.168.1.1 as their default gateway, and the trunk may still be missing allowed VLANs—making A the simplest, design‑coherent solution.

Answer

On R1, configure subinterface Gi0/0.10 with encapsulation dot1Q 10 and IP 192.168.10.1/24, and subinterface Gi0/0.20 with encapsulation dot1Q 20 and IP 192.168.20.1/24. Enable ip routing. On SW1, change native VLAN to 10 on trunk Gi0/1.

Answer

On R1, configure subinterface Gi0/0.1 with encapsulation dot1Q 1 (without native keyword) and IP 192.168.1.1/24. Enable ip routing. On SW1, ensure trunk Gi0/1 allows VLANs 10,20 and set native VLAN 1.

Answer

On R1, configure subinterface Gi0/0.10 with encapsulation dot1Q 10 native and IP 192.168.10.1/24, and subinterface Gi0/0.20 with encapsulation dot1Q 20 and IP 192.168.20.1/24. Enable ip routing. On SW1, set native VLAN to 10 on trunk Gi0/1.

Question 7

You are connected to a multilayer switch SW1 via console. SW1 has an IP phone and an access point connected to interfaces GigabitEthernet0/1 and GigabitEthernet0/2 respectively. Configure the access ports so that the IP phone receives a voice VLAN (VLAN 110) and PoE priority critical, and the access point receives PoE priority high. Verify your configuration using show interfaces switchport and show power inline.

Accepted Answer

interface GigabitEthernet0/1
 switchport mode access
 switchport access vlan 10
 switchport voice vlan 110
 power inline priority critical
!
interface GigabitEthernet0/2
 switchport mode access
 power inline priority high. The IP phone requires a voice VLAN configured with the switchport voice vlan command. PoE priority is set per interface using power inline priority. For the phone, the priority is critical; for the AP, it is high. Verification with show interfaces switchport confirms voice VLAN, and show power inline shows priority settings.

Answer

interface GigabitEthernet0/1
 switchport mode trunk
 switchport trunk allowed vlan 10,110
 power inline priority critical
!
interface GigabitEthernet0/2
 switchport mode access
 power inline priority high

Answer

interface GigabitEthernet0/1
 switchport mode access
 switchport access vlan 110
 switchport voice vlan 10
 power inline priority critical
!
interface GigabitEthernet0/2
 switchport mode access
 power inline priority high

Answer

interface GigabitEthernet0/1
 switchport mode access
 switchport access vlan 10
 switchport voice vlan 110
 power inline priority high
!
interface GigabitEthernet0/2
 switchport mode access
 power inline priority critical

Question 8

You are connected to a multilayer switch MLS1. Configure it so that IP phones connected to FastEthernet 0/1 and FastEthernet 0/2 use voice VLAN 20 and receive power via PoE. Additionally, FastEthernet 0/3 must be configured as an access port for a wireless access point (AP) on VLAN 30, with PoE enabled. Verify your configuration using 'show interfaces switchport' and 'show power inline'.

Accepted Answer

Configure 'switchport voice vlan 20' on Fa0/1 and Fa0/2; ensure PoE is enabled (auto) on all three ports.. The switch ports Fa0/1 and Fa0/2 are currently configured as access ports on VLAN 10, with no voice VLAN. To support IP phones, you must configure a voice VLAN (VLAN 20) on these interfaces. Additionally, PoE is already enabled (auto) but needs to remain active. For Fa0/3, it is already an access port on VLAN 30, which is correct for an AP, but you must ensure PoE is enabled (it is). The missing configuration for Fa0/1 and Fa0/2 is the 'switchport voice vlan 20' command. After applying, verify using 'show interfaces switchport' to see the voice VLAN set, and 'show power inline' to confirm PoE delivery.

Answer

Configure 'switchport mode trunk' on Fa0/1 and Fa0/2, and set the native VLAN to 20; enable PoE on Fa0/3.

Answer

Configure 'switchport access vlan 20' on Fa0/1 and Fa0/2, and 'switchport voice vlan 30' on Fa0/3; enable PoE globally.

Answer

Configure 'power inline never' on Fa0/1 and Fa0/2, and 'switchport voice vlan 20' on Fa0/3; ensure Fa0/3 is in trunk mode.

Question 9

You are connected to the console of a Catalyst 2960+ switch named SW2. Configure the switch so that the IP phone connected to interface FastEthernet0/5 receives power via PoE and uses VLAN 150 for voice traffic, while the PC connected through the phone uses VLAN 50 for data. Additionally, the access point connected to interface FastEthernet0/10 must receive PoE and be placed in VLAN 100. Assume the interfaces are already correctly configured as access ports in VLAN 50 and VLAN 100, respectively. Verify your configuration using the appropriate show commands.

Accepted Answer

On interface FastEthernet0/5: switchport voice vlan 150, power inline auto. On interface FastEthernet0/10: power inline auto. Verify with show interfaces switchport and show power inline.. The switch had no voice VLAN or PoE configured on the ports. On FastEthernet0/5, you need to add 'switchport voice vlan 150' to separate voice traffic from data, and 'power inline auto' to enable PoE for the IP phone. On FastEthernet0/10, you only need to enable PoE with 'power inline auto' because the AP already has its access VLAN set. After configuration, 'show interfaces switchport' will confirm the voice VLAN, and 'show power inline' will verify PoE status.

Answer

On interface FastEthernet0/5: switchport voice vlan 150, power inline auto. On interface FastEthernet0/10: switchport access vlan 100, power inline auto. Verify with show interfaces switchport and show power inline.

Answer

On interface FastEthernet0/5: switchport voice vlan 150, power inline auto. On interface FastEthernet0/10: power inline auto. Verify with show vlan and show power inline.

Answer

On interface FastEthernet0/5: switchport voice vlan 150, power inline auto. On interface FastEthernet0/10: power inline auto. Verify with show interfaces trunk and show power inline.

Question 10

You are connected to SW1. This is a Layer 2 switch that connects multiple IP phones and an AP. The AP is on Gi0/3 and must receive PoE and be placed in VLAN 100 (native VLAN). IP phones on Gi0/1 and Gi0/2 must use VLAN 20 for voice and VLAN 10 for data, and must receive PoE. Currently, the AP cannot get an IP address and the phones have no voice connectivity. Configure SW1 to fix these issues.

Accepted Answer

interface Gi0/1; switchport voice vlan 20; power inline auto; interface Gi0/2; switchport voice vlan 20; power inline auto; interface Gi0/3; power inline auto. The AP on Gi0/3 requires PoE (power inline auto) and must be on a trunk port with native VLAN 100. The current configuration likely lacks PoE, and the port may be set as an access port instead of a trunk. For the IP phones on Gi0/1 and Gi0/2, the missing 'switchport voice vlan 20' command prevents voice traffic from using VLAN 20, and PoE must also be enabled. The provided solution adds the necessary voice VLAN and PoE commands. Option A is correct because it applies voice VLAN 20 and PoE to the phone ports, and PoE to the AP port. Option B incorrectly assigns voice VLAN 10; Option C omits PoE on the AP port; Option D applies PoE globally but fails to set voice VLANs and incorrectly configures trunk native VLAN on all ports.

Answer

interface Gi0/1; switchport voice vlan 10; power inline auto; interface Gi0/2; switchport voice vlan 10; power inline auto; interface Gi0/3; switchport access vlan 100; power inline auto

Answer

interface Gi0/1; switchport voice vlan 20; interface Gi0/2; switchport voice vlan 20; interface Gi0/3; switchport access vlan 100

Answer

interface Gi0/1; power inline auto; interface Gi0/2; power inline auto; interface Gi0/3; power inline auto; switchport trunk native vlan 100

Question 11

You are connected to a single switch, SW1, which is a Cisco Catalyst 2960 running Cisco IOS. Configure port GigabitEthernet0/1 as an access port for a Cisco IP phone and a PC on the same VLAN (Voice VLAN 20, Data VLAN 10). The switch must provide PoE to the phone. Additionally, configure GigabitEthernet0/2 as an access port for a wireless access point (AP) that requires PoE. Verify both configurations using the appropriate show commands. The current running-config is incomplete; you must add the necessary commands.

Accepted Answer

interface GigabitEthernet0/1
 switchport mode access
 switchport access vlan 10
 switchport voice vlan 20
 power inline auto
interface GigabitEthernet0/2
 switchport mode access
 switchport access vlan 10
 power inline auto. The configuration was missing the voice VLAN assignment on Gi0/1 and PoE settings on both ports. For Gi0/1, the command 'switchport voice vlan 20' is required to separate voice traffic from data traffic. For both Gi0/1 and Gi0/2, PoE must be enabled; by default 'power inline auto' is set, but since the ports show 'off', they may have been disabled. The solution ensures PoE is enabled with 'power inline auto' and sets the voice VLAN correctly. Verification with 'show interfaces switchport' should show 'Voice VLAN: 20' and 'show power inline' should show 'auto' for both ports.

Answer

interface GigabitEthernet0/1
 switchport mode trunk
 switchport trunk allowed vlan 10,20
 power inline auto
interface GigabitEthernet0/2
 switchport mode access
 switchport access vlan 10
 power inline auto

Answer

interface GigabitEthernet0/1
 switchport mode access
 switchport access vlan 10
 switchport voice vlan 20
 power inline never
interface GigabitEthernet0/2
 switchport mode access
 switchport access vlan 10
 power inline auto

Answer

interface GigabitEthernet0/1
 switchport mode access
 switchport access vlan 20
 switchport voice vlan 10
 power inline auto
interface GigabitEthernet0/2
 switchport mode access
 switchport access vlan 10
 power inline auto

Question 12

You are connected to a Multilayer Switch MLS1. Configure the switch so that interface GigabitEthernet1/0/1 is an access port for VLAN 10, with voice VLAN 110 for an IP phone, and enable PoE. Additionally, interface GigabitEthernet1/0/2 must be an access port for VLAN 20 to connect an AP. Verify the configuration using 'show interfaces switchport' and 'show power inline'.

Accepted Answer

interface GigabitEthernet1/0/1
 switchport mode access
 switchport access vlan 10
 switchport voice vlan 110
 power inline auto
interface GigabitEthernet1/0/2
 switchport mode access
 switchport access vlan 20. Option A is correct. It configures Gi1/0/1 as an access port in VLAN 10 with voice VLAN 110 and PoE enabled, and Gi1/0/2 as an access port in VLAN 20. Option B is wrong because it uses 'switchport mode trunk' instead of 'switchport mode access'. For a voice VLAN, the port should be an access port, not a trunk. Option C is wrong because it disables PoE with 'power inline never', but the IP phone requires power. Option D is wrong because it assigns the access VLAN as 110 and voice VLAN as 10, reversing the intended roles. Verify with 'show interfaces switchport' and 'show power inline'.

Answer

interface GigabitEthernet1/0/1
 switchport mode trunk
 switchport trunk allowed vlan 10,110
 power inline auto
interface GigabitEthernet1/0/2
 switchport mode access
 switchport access vlan 20

Answer

interface GigabitEthernet1/0/1
 switchport mode access
 switchport access vlan 10
 switchport voice vlan 110
 power inline never
interface GigabitEthernet1/0/2
 switchport mode access
 switchport access vlan 20

Answer

interface GigabitEthernet1/0/1
 switchport mode access
 switchport access vlan 110
 switchport voice vlan 10
 power inline auto
interface GigabitEthernet1/0/2
 switchport mode access
 switchport access vlan 20

Question 13

You are connected to a multilayer switch MLS1 via the console. Configure MLS1 so that IP phones connected to interface GigabitEthernet0/1 receive power via PoE, use VLAN 10 for data traffic, and use VLAN 20 for voice traffic, while the access port for an AP on GigabitEthernet0/2 should be placed in VLAN 30 and have PoE disabled. Verify your configuration using appropriate show commands.

Accepted Answer

interface GigabitEthernet0/1
 switchport mode access
 switchport access vlan 10
 switchport voice vlan 20
 power inline auto
!
interface GigabitEthernet0/2
 switchport mode access
 switchport access vlan 30
 power inline never. For the IP phone port (G0/1), you need to enable PoE (power inline auto) and configure the voice VLAN (switchport voice vlan 20) so that the phone uses VLAN 20 for voice and the access VLAN 10 for data. For the AP port (G0/2), you must change the access VLAN to 30 and disable PoE (power inline never) to prevent powering the AP through the switch. Verify with 'show interfaces switchport' to confirm voice VLAN and access VLAN settings, and 'show power inline' to check PoE status.

Answer

interface GigabitEthernet0/1
 switchport mode trunk
 switchport trunk allowed vlan 10,20
 power inline auto
!
interface GigabitEthernet0/2
 switchport mode access
 switchport access vlan 30
 power inline never

Answer

interface GigabitEthernet0/1
 switchport mode access
 switchport access vlan 20
 switchport voice vlan 10
 power inline auto
!
interface GigabitEthernet0/2
 switchport mode access
 switchport access vlan 30
 power inline never

Answer

interface GigabitEthernet0/1
 switchport mode access
 switchport access vlan 10
 switchport voice vlan 20
 power inline never
!
interface GigabitEthernet0/2
 switchport mode access
 switchport access vlan 30
 power inline auto

Question 14

You are connected to a multilayer switch MLS1. Configure FastEthernet0/1 as an access port for an IP phone and a PC, with voice VLAN 20 and data VLAN 10. Also enable PoE on the port. Then verify the configuration using 'show interfaces switchport' and 'show power inline'.

Accepted Answer

interface FastEthernet0/1
 switchport mode access
 switchport access vlan 10
 switchport voice vlan 20
 power inline auto
 no shutdown. Option A is correct because it configures FastEthernet0/1 as an access port with data VLAN 10, voice VLAN 20, and PoE enabled, which is the required setup for an IP phone and PC. Option B is incorrect because 'no switchport' makes the interface a routed port (Layer 3), but it needs to be a Layer 2 access port to support an IP phone and PC. Option C is incorrect because trunk mode is used for switch-to-switch links, not for connecting end devices like an IP phone and PC. Option D is incorrect because 'power inline never' disables PoE, but the IP phone requires power; it should use 'power inline auto'.

Answer

interface FastEthernet0/1
 no switchport
 ip address 192.168.1.1 255.255.255.0
 power inline auto
 no shutdown

Answer

interface FastEthernet0/1
 switchport mode trunk
 switchport trunk allowed vlan 10,20
 power inline auto
 no shutdown

Answer

interface FastEthernet0/1
 switchport mode access
 switchport access vlan 10
 switchport voice vlan 20
 power inline never
 no shutdown

Question 15

You are connected to SW1 via the console. The network uses Rapid-PVST+ and you need to ensure that SW1 becomes the root bridge for VLAN 10 and VLAN 20. Additionally, configure PortFast and BPDU Guard on interface GigabitEthernet0/1, which connects to a workstation. After configuration, the workstation is moved and the port goes err-disabled. Diagnose the cause and recover the port without reloading the switch.

Accepted Answer

Configure spanning-tree vlan 10 priority 4096 and spanning-tree vlan 20 priority 4096. Then on interface GigabitEthernet0/1, configure spanning-tree portfast and spanning-tree bpduguard enable. After removing the BPDU source, use 'shutdown' and 'no shutdown' to recover the port.. SW1 is currently the root for VLAN 10 but not for VLAN 20. To become root for both VLANs, set the spanning-tree priority to a lower value (e.g., 4096) for each VLAN. The port Gi0/1 went err-disabled because it received a BPDU, which is unexpected on a PortFast edge port with BPDU Guard enabled. To recover, first identify and remove the BPDU source (likely another switch connected to that port), then use 'shutdown' followed by 'no shutdown' on the interface to bring it back up.

Answer

Configure spanning-tree vlan 10,20 root primary and spanning-tree portfast on Gi0/1; then use 'errdisable recovery cause bpduguard' to automatically recover the port.

Answer

Configure spanning-tree vlan 10,20 priority 0 and spanning-tree bpduguard enable on Gi0/1; then use 'no spanning-tree bpduguard' to recover the port.

Answer

Configure spanning-tree vlan 10,20 priority 4096 and spanning-tree portfast on Gi0/1; then use 'clear spanning-tree detected-protocols' to recover the port.

CCNA Switching and Network Access Practice Test 19 — 15 Questions

Exhibit

CCNA Switching and Network Access Practice Test 19 — 15 Questions

Exhibit