Q. 120:
What is the primary function of the “show interfaces trunk” command?
a) To display active trunks and their configurations
b) To show MAC address table entries for a specific interface
c) To list VLANs that are currently blocked by STP
d) To verify port-security settings
Answer: (a) To display active trunks and their configurations
Q. 121:
Which command assigns a static MAC address to a switch port?
a) switchport static mac-address [MAC]
b) switchport port-security mac-address [MAC]
c) port-security static mac-address [MAC]
d) port-security mac-address static
Answer: (b) switchport port-security mac-address [MAC]
Q. 122:
Which type of attack exploits the spanning tree protocol to force the network into recalculating paths frequently?
a) VLAN hopping
b) MAC flooding
c) STP manipulation
d) DoS
Answer: (c) STP manipulation
Q. 123:
What is the primary role of a backup root bridge in a Spanning Tree Protocol (STP) topology?
a) To act as a secondary switch to forward traffic
b) To take over if the primary root bridge fails
c) To prevent the formation of broadcast storms
d) To handle VLAN mismatches
Answer: (b) To take over if the primary root bridge fails
Q. 124:
Which Cisco command is used to configure a VLAN on an interface?
a) switchport vlan [vlan_id]
b) vlan interface [vlan_id]
c) switchport access vlan [vlan_id]
d) switchport interface vlan [vlan_id]
Answer: (c) switchport access vlan [vlan_id]
Q. 125:
Which technology is used to improve the speed of STP convergence after a topology change?
a) UplinkFast
b) BPDU Guard
c) Rapid Spanning Tree Protocol (RSTP)
d) PAgP
Answer: (c) Rapid Spanning Tree Protocol (RSTP)
Q. 126:
Which command can be used to disable VTP on a Cisco switch?
a) vtp mode off
b) vtp mode disable
c) vtp mode transparent
d) vtp mode server
Answer: (c) vtp mode transparent
Q. 127:
Which command shows a summary of all EtherChannels configured on a Cisco switch?
a) show etherchannel summary
b) show port-channel summary
c) show channelgroup summary
d) show interface summary
Answer: (a) show etherchannel summary
Q. 128:
What does the command “switchport port-security maximum 2” do?
a) Limits the number of VLANs on the port to 2
b) Limits the number of MAC addresses learned on the port to 2
c) Limits the number of trunks on the port to 2
d) Limits the number of dynamic addresses on the port to 2
Answer: (b) Limits the number of MAC addresses learned on the port to 2
Q. 129:
Which Cisco feature prevents a switchport from becoming a trunk port?
a) BPDU Guard
b) PortFast
c) Root Guard
d) DTP
Answer: (a) BPDU Guard
Q. 130:
Which command can be used to verify VLAN membership on a Cisco switch?
a) show vlan
b) show vlan membership
c) show vlan brief
d) show switchport vlan
Answer: (c) show vlan brief
