150 CCNA Switch Configuration MCQS with Explanation

71. Which command is used to set a switch port as a member of VLAN 10?

  • a) vlan 10
  • b) switchport mode vlan 10
  • c) switchport access vlan 10
  • d) vlan access 10

Answer: c) switchport access vlan 10

The switchport access vlan 10 command assigns the port to VLAN 10.

72. The command no switchport is used to configure an interface as a _____ interface.

  • a) Routed
  • b) Access
  • c) Trunk
  • d) Layer 2

Answer: a) Routed

The no switchport command converts a Layer 2 switch port into a Layer 3 routed port.

73. What is the function of the spanning-tree protocol in a switched network?

  • a) To forward traffic to multiple VLANs
  • b) To block loops in the network
  • c) To provide IP address resolution
  • d) To encrypt network traffic

Answer: b) To block loops in the network

The Spanning Tree Protocol (STP) is used to prevent loops in a switched network by blocking redundant paths.

74. Which of the following commands is used to view the MAC address table on a switch?

  • a) show mac-address-table
  • b) show mac table
  • c) show arp
  • d) show interfaces mac

Answer: a) show mac-address-table


The show mac-address-table command displays the MAC addresses that the switch has learned and the ports they are associated with.

75. Fill in the blank: The _____ command is used to configure an IP address on a switch’s management interface.

  • a) ip address
  • b) interface ip
  • c) vlan ip address
  • d) set ip address

Answer: a) ip address

The ip address command is used within the interface configuration mode to set an IP address on the switch’s management interface.

76. What is the purpose of the show interfaces status command?

  • a) To display the interface status and settings
  • b) To show IP address configuration
  • c) To list the MAC addresses associated with each interface
  • d) To display VLAN membership

Answer: a) To display the interface status and settings

The show interfaces status command provides a summary of each interface’s operational status, speed, duplex settings, and VLAN assignment.

77. Which command is used to enable port security on a switch port?

  • a) switchport mode access
  • b) switchport security
  • c) switchport port-security
  • d) switchport secure

Answer: c) switchport port-security

The switchport port-security command is used to enable port security, which helps control access to the network by limiting the number of MAC addresses on a port.

78. Fill in the blank: The _____ command is used to configure a static route on a Layer 3 switch.

  • a) ip route
  • b) route static
  • c) static route
  • d) set route

Answer: a) ip route


The ip route command is used to configure static routes on a Layer 3 switch.

79. Which of the following is the correct command to view the current VLANs configured on a Cisco switch?

  • a) show vlan
  • b) show vlan-config
  • c) show vlan-brief
  • d) show vlan-list

Answer: a) show vlan

The show vlan command provides a detailed view of the VLANs configured on the switch, including their status and associated ports.

80. What does the spanning-tree portfast command do when applied to a switch port?

  • a) Enables faster IP address assignment
  • b) Prevents the port from causing loops
  • c) Immediately transitions the port to forwarding state
  • d) Converts the port into a trunk port

Answer: c) Immediately transitions the port to forwarding state

The spanning-tree portfast command is used to immediately transition the port to the forwarding state, bypassing the usual STP listening and learning states. It is typically used on access ports to prevent delays in connecting end devices.
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