CCNA Switching and Network Access Practice Test 29 — 15 Questions

Question 1

A network administrator is configuring a switch port that connects to a Cisco IP phone, which in turn has a desktop PC attached to its PC port. The administrator wants the phone to be placed in VLAN 100 and the PC in VLAN 200 on the same physical switch port. Which configuration should be applied to the switch port?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

Configure the port as an access port in VLAN 200 and configure the voice VLAN as 100 using the switchport voice vlan 100 command.. The correct approach uses an access port for the PC data VLAN and the switchport voice vlan command for the phone voice VLAN. This allows the phone to tag voice traffic with VLAN 100 while the PC sends untagged traffic in VLAN 200. The phone learns the voice VLAN through CDP or LLDP-MED and can also pass through the PC data.

Answer

Configure the port as a trunk port and allow VLAN 100 and VLAN 200 on the trunk.

Answer

Configure the port as an access port in VLAN 100 and enable the voice VLAN 100 on the port.

Answer

Configure the port as a dynamic auto port and enable VLAN 100 and VLAN 200 with the switchport trunk allowed vlan command.

Question 2

A network engineer is troubleshooting a switch stack where a newly added member switch is not passing traffic. The engineer runs the command 'show switch' and sees that the new switch is in 'Provisioned' state. What is the most likely cause of this issue?

Accepted Answer

The new switch has not been physically connected to the stack or has not been powered on.. The 'Provisioned' state in a switch stack indicates that the switch is expected based on configuration but is not currently detected. This usually means the switch is not physically connected to the stack or is not powered on. Once the switch is connected and powered, it should join the stack and become active.

Answer

The stack priority of the new switch is set lower than the existing switches.

Answer

The new switch has a different model number than the provisioned configuration.

Answer

The new switch is running an incompatible IOS version compared to the stack master.

Question 3

A junior administrator at a branch office connects a new Cisco IP phone to switch port FastEthernet0/12. The phone must receive power from the switch, and a PC will later be daisy-chained to the phone's PC port. The switch must also ensure the voice traffic is carried in VLAN 50 while data traffic stays in VLAN 10. Which configuration on the interface accomplishes these requirements?

Accepted Answer

switchport mode access, switchport access vlan 10, switchport voice vlan 50, and power inline auto. An access port with a data VLAN and a separate voice VLAN is the standard way to connect a Cisco IP phone that also provides a PC port. Enabling power inline auto supplies PoE so the phone powers up, and the voice VLAN command causes the phone to tag its voice frames into VLAN 50 while the attached PC remains in VLAN 10.

Answer

switchport mode access, switchport access vlan 50, switchport voice vlan 10, and power inline auto

Answer

switchport mode trunk, switchport trunk native vlan 10, switchport trunk allowed vlan 50, and power inline never

Answer

switchport mode dynamic auto, switchport access vlan 10, switchport voice vlan 50, and power inline auto

Question 4

A network administrator is configuring a switch port that connects to a Cisco IP phone, which in turn has a desktop PC attached to its PC port. The administrator wants the phone to be placed in VLAN 100 and the PC in VLAN 200 on the same physical switch port. Which configuration should be applied to the switch port?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

switchport mode access
switchport access vlan 20
switchport voice vlan 30. The correct configuration uses an access port for data VLAN 20 and a voice VLAN 30. This allows the PC to send untagged data frames that are assigned to VLAN 20, while the IP phone tags its voice frames with VLAN 30. This is the standard and recommended approach for connecting an IP phone and PC to a single switch port.

Answer

switchport mode trunk
switchport trunk native vlan 20
switchport trunk allowed vlan 30

Answer

switchport mode trunk
switchport trunk native vlan 30
switchport trunk allowed vlan 20

Answer

switchport mode access
switchport access vlan 30
switchport voice vlan 20

Question 5

A network administrator is troubleshooting a switch port that is flapping between up and down states. The administrator suspects a duplex mismatch. Which command should be used to verify the duplex settings on the interface?

Accepted Answer

show interfaces GigabitEthernet0/1. The 'show interfaces' command provides operational status, including duplex and speed, along with error counters that can indicate a duplex mismatch. It is the most reliable command to verify current duplex settings and diagnose related issues.

Answer

show controllers GigabitEthernet0/1

Answer

show running-config interface GigabitEthernet0/1

Answer

show interfaces status

Question 6

A network administrator is configuring a switch port that connects to a Cisco IP phone, which in turn has a desktop PC attached to its PC port. The administrator wants the phone to be placed in VLAN 100 and the PC in VLAN 200 on the same physical switch port. Which configuration should be applied to the switch port?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

switchport mode trunk. To configure a trunk port that carries only VLANs 10, 20, and 30, you must set the port to trunk mode and then specify the allowed VLANs. The switchport mode trunk command enables trunking, and the switchport trunk allowed vlan 10,20,30 command restricts the trunk to those VLANs. This ensures the server can communicate on the required VLANs while blocking others.

Answer

switchport access vlan 10

Answer

switchport voice vlan 20

Answer

switchport nonegotiate

Question 7

A network technician is configuring a new Cisco switch. The technician wants to connect a server that requires 802.1Q trunking to carry multiple VLANs. The server's network interface card supports VLAN tagging and is configured to use VLAN 10, 20, and 30. Which switch port mode should be configured on the switch port connected to the server?

Accepted Answer

Trunk mode. Trunk mode is required to carry multiple VLANs over a single link. The server supports 802.1Q tagging, so configuring the switch port as a trunk allows VLAN 10, 20, and 30 traffic to pass. Access mode is for single VLAN, and dynamic modes rely on DTP, which the server does not support.

Answer

Access mode

Answer

Dynamic auto mode

Answer

Dynamic desirable mode

Question 8

A network administrator is troubleshooting a Cisco switch that is experiencing high CPU utilization. The administrator suspects a Layer 2 loop. Which command can be used to verify if Spanning Tree Protocol (STP) has blocked any ports due to a loop?

Accepted Answer

show spanning-tree. The show spanning-tree command is the correct tool to verify STP port states, including blocking. It shows the root bridge, port roles, and states for each VLAN, allowing the administrator to confirm if STP has blocked a port to prevent a loop.

Answer

show interfaces status

Answer

show ip interface brief

Answer

show mac address-table

Question 9

A network technician is connecting a new access switch to an existing distribution switch. The access switch will carry multiple VLANs. The technician wants to ensure that the link becomes a trunk automatically if the other side is set to desirable mode. Which command should be configured on the access switch port?

Accepted Answer

switchport mode dynamic auto. The switchport mode dynamic auto command places the port in a passive trunking state where it will become a trunk if the other side actively negotiates. When the distribution switch is set to dynamic desirable, it will initiate trunking, and the access switch will respond. This allows the link to form a trunk automatically without manual intervention.

Answer

switchport mode dynamic desirable

Answer

switchport mode access

Answer

switchport nonegotiate

Question 10

A network technician is connecting a new access switch to an existing distribution switch. The access switch will carry multiple VLANs, and the technician wants to ensure that the link is configured as a trunk and that only VLANs 10, 20, and 30 are allowed. Which command should be used on the access switch interface to restrict the allowed VLANs?

Accepted Answer

switchport trunk allowed vlan 10,20,30. To restrict a trunk port to specific VLANs, the 'switchport trunk allowed vlan' command with a list of VLAN IDs is used. This replaces the default allowed list (all VLANs) with the specified ones. The 'add' keyword would append rather than replace, and other commands either set native VLAN or are for access ports. Thus, the correct command is the one that sets the allowed VLAN list directly.

Answer

switchport access vlan 10,20,30

Answer

switchport trunk allowed vlan add 10,20,30

Answer

switchport trunk native vlan 10,20,30

Question 11

A network engineer is configuring a switch port for a new wireless access point that will support multiple SSIDs mapped to different VLANs. The AP will be powered by PoE and will tag traffic for each SSID. Which configuration on the switch port is most appropriate?

Accepted Answer

Configure the port as a trunk port, set the native VLAN to the AP management VLAN, and allow the SSID VLANs on the trunk.. For an access point supporting multiple SSIDs, the switch port should be configured as a trunk. The native VLAN is used for untagged management traffic from the AP, while each SSID's traffic is tagged with its corresponding VLAN. Allowing only the necessary VLANs on the trunk is a best practice. This configuration ensures proper segmentation and security.

Answer

Configure the port as a trunk port and set the native VLAN to VLAN 1, allowing all VLANs.

Answer

Configure the port as an access port in the management VLAN and use 802.1X authentication for the SSIDs.

Answer

Configure the port as an access port in the management VLAN and enable voice VLAN for the SSIDs.

Question 12

A campus switch has VLANs 10, 20, and 30 configured. Port GigabitEthernet0/5 connects to a server that must send and receive traffic for all three VLANs, and the server's NIC supports 802.1Q tagging. The administrator wants the server to handle VLAN tagging itself. Which configuration on GigabitEthernet0/5 is appropriate?

Accepted Answer

switchport mode trunk and switchport trunk allowed vlan 10,20,30. When a server NIC performs 802.1Q tagging itself, the switch port must be a trunk so tagged frames for multiple VLANs can pass. Restricting the allowed VLAN list to 10, 20, and 30 limits unnecessary traffic and matches the requirement. A static trunk avoids DTP negotiation issues with a server that does not run DTP.

Answer

switchport mode access and switchport access vlan 10

Answer

switchport mode trunk, switchport trunk native vlan 10, and switchport access vlan 20

Answer

switchport mode dynamic desirable and switchport trunk allowed vlan 10,20,30

Question 13

A network administrator notices that a switch port connecting to an end-user workstation is flapping between up and down states. The port is configured with PortFast and BPDU Guard. The workstation is replaced with a small unmanaged switch that begins sending BPDUs. What is the expected result on the switch port?

Accepted Answer

The port enters the err-disabled state because BPDU Guard detects the BPDU on a PortFast-enabled port.. BPDU Guard protects PortFast ports by err-disabling them when a BPDU is received. A PortFast port is meant for end hosts, so BPDUs indicate an unauthorized switch, and the guard action prevents a potential Layer 2 loop. The port becomes err-disabled rather than blocking, and it stays down until an administrator recovers it or err-disable recovery is configured.

Answer

The port transitions to the blocking state but remains administratively up.

Answer

The port remains in the forwarding state and simply logs a syslog message about the BPDU.

Answer

The port automatically becomes a trunk and negotiates with the unmanaged switch.

Question 14

A network administrator is configuring a switch port that connects to a Cisco IP phone, which in turn has a desktop PC attached to its PC port. The administrator wants the phone to be placed in VLAN 100 and the PC in VLAN 200 on the same physical switch port. Which configuration should be applied to the switch port?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

CAPWAP Discovery Request. Access points use CAPWAP to discover and join a wireless LAN controller. After getting an IP address, the AP sends CAPWAP Discovery Requests via broadcast or multicast. The WLC responds, and the AP establishes a CAPWAP tunnel. DHCP Option 43 and DNS are methods to provide the WLC IP, but the protocol itself is CAPWAP. LWAPP is outdated. Therefore, CAPWAP Discovery Request is the correct answer.

Answer

DNS resolution of CISCO-CAPWAP-CONTROLLER

Answer

LWAPP Discovery Request

Answer

DHCP Option 43

Question 15

A network engineer is deploying a new access layer switch stack in a building. The design requires that the switches share a single management IP address, that a failed stack member does not take down the entire stack, and that the stack operates with the highest available throughput between members. Which two statements about Cisco StackWise technology support these requirements? (Choose two.)

Accepted Answer

StackWise uses a ring topology with redundant paths so that a single member or cable failure does not break the stack.. StackWise presents multiple switches as one logical device with a single management IP and shared configuration, and its ring cabling provides redundant paths so one failed member or cable does not break the stack. These two properties directly address the requirements for simplified management and resiliency in the access layer deployment.

Answer

StackWise requires all members to run different IOS versions to provide redundancy.

Answer

StackWise provides a single management IP only when the stack is configured as a VSS pair.

Answer

StackWise member switches must be connected only through their uplink ports to form the stack ring.