CCNA

You issue the spanning-tree guard root command on a switchport that you are connecting to a new unconfigured switch.

Which of the following are you most likely attempting to do? (Select the best answer)

• Prevent loops from an interruption of BPDU flow

• Prevent the new switch from being elected root

• prevent a port from transitioning through all of the STP states

• prevent loops on a port that could erroneously receive BPDUs

You want to decrease the amount of time it takes for switch ports on SwitchA to begin forwarding. PortFast is not configured on any of the switch ports on SwitchA. You issue the spanning-tree portfast default command from global configuration mode.

Which of the ports on SwitchA will use PortFast?

• no ports, because PortFast cannot be enabled globally

• all access ports

• all trunk ports

• all ports

You need to determine how traffic will flow between the two switches in the topology shown above. No VLANs are configured on the switches.

Which port will be blocked?

• The FastEthernet port on SwitchB will be blocked

• The GigabitEthernet port on SwitchB will be blocked

• The FastEthernet port on SwitchA will be blocked

• No ports will be blocked

• The GigabitEthernet port on SwitchA will be blocked

SwitchA and SwitchB are connected over an 802.1Q trunk link. The native VLAN for the trunk link is configured as VLAN 11 on SwitchA and VLAN 111 on SwitchB. All of the hosts reside in the same IP subnet.

What of the following is true regarding the connectivity between the hosts in this scenario?

• HostC can ping HostD

• None of the hosts can ping each other

• HostB can ping HostC

• HostD can ping HostA

• HostA can ping HostB

Which of the following addresses will a switch use to make forwarding decisions?

• destination MAC addresses

• source IP addresses

• source MAC addresses

• destination IP addresses

You have issued the show running-config command on SwitchA and have received the following partial output:

interface FastEthernet0/8

switchport trunk encapsulation dot1q

switchport mode trunk

switchport access vlan 20

spanning-tree portfast

Why would port FastEthernet0/8 not be displayed in the output of the show vlan command on SwitchA?

• FastEthernet 0/8 is configured to use PortFast

• FastEthernet 0/8 is configured as a trunk port

• FastEthernet 0/8 is configured as an access port

• FastEthernet0/8 is not configured with an IP address

You connect SwitchA and SwitchB as shown above. SwitchA is a cisco switch and SwitchB is a non-Cisco switch. You want to be able to trunk VLAN traffic between the two switches.

What commands should you issue on SwitchA (Select 2 choices)

• SwitchA(config-if)#switchport mode access

• SwitchA(config)#switchport trunk encapsulation isl

• SwitchA(config-if)#switchport mode trunk

• SwitchA(config)#switchport trunk encapsulation dot1q

• SwitchA(config-if)#switchport trunk encapsulation dot1q

An LACP channel group on SwitchA is configured to operate in passive mode.

In which mode should you configure the corresponding channel group on SwitchB to create a valid EtherChannel configuration? (Select the best answer)

• desirable

• passive

• on

• auto

• active

You need to discover the following information about a device connected to a Cisco switch:

• 1.) The IP address of the neighboring device

• 2.) The interface on the switch that is connected to the neighboring device

• 3.) The interface on the neighboring device that is connected to the switch

Which of the following commands should you issue?

• show cdp interface

• show cdp neighbors detail

• show cdp neighbors

• show cdp

Which of the following optional STP features reduces convergence time by immediately placing edge ports into a forwarding state?

• BPDU filter

• PortFast

• root guard

• BPDU guard

• loop guard