Q. 81:
Which of the following is an example of a Layer 2 loop-prevention mechanism?
a) VTP
b) EtherChannel
c) Spanning Tree Protocol
d) CDP
Answer: (c) Spanning Tree Protocol
Q. 82:
Which of the following protocols is responsible for advertising VLAN information across switches?
a) CDP
b) VTP
c) LACP
d) OSPF
Answer: (b) VTP
Q. 83:
Which VLAN is considered the default native VLAN on Cisco switches?
a) VLAN 100
b) VLAN 1
c) VLAN 0
d) VLAN 99
Answer: (b) VLAN 1
Q. 84:
What type of attack can occur when an attacker connects to a switch and attempts to create a trunk link in order to access all VLANs?
a) VLAN hopping
b) MAC flooding
c) STP attack
d) BPDU attack
Answer: (a) VLAN hopping
Q. 85:
Which of the following commands is used to view the port security settings on a Cisco switch?
a) show port-security
b) show port-security interface
c) show switchport security
d) show mac-address-table security
Answer: (a) show port-security
Q. 86:
Which command will display the current configuration of EtherChannel on a Cisco switch?
a) show etherchannel
b) show port-channel summary
c) show etherchannel summary
d) show ether summary
Answer: (b) show port-channel summary
Q. 87:
What does the “native VLAN” represent on a Cisco switch trunk link?
a) The VLAN that does not get tagged over the trunk
b) The VLAN that has the highest priority
c) The VLAN reserved for management traffic
d) The VLAN with the lowest number
Answer: (a) The VLAN that does not get tagged over the trunk
Q. 88:
Which protocol is responsible for preventing routing loops in a network by using a link-state database?
a) STP
b) VTP
c) OSPF
d) BGP
Answer: (c) OSPF (though this is a routing protocol, it’s relevant for those learning switching concepts)
Q. 89:
Which of the following port modes prevents a port from sending or receiving dynamic trunk negotiation messages?
a) Trunk
b) Dynamic auto
c) Dynamic desirable
d) Nonegotiate
Answer: (d) Nonegotiate
Q. 90:
Which Cisco command is used to verify the VTP mode and domain configuration on a switch?
a) show vtp status
b) show vlan vtp
c) show interface vtp
d) show spanning-tree vtp
Answer: (a) show vtp status
