Latest CCNA 220-120 Real Exam Download 51-60

By | July 27, 2013



Assuming the default switch configuration, which VLAN range can be added, modified, and removed on a Cisco switch?

A.      1 through 1001

B.      2 through 1001

C.      1 through 1002

D.      2 through 1005


Correct Answer: B




Which statement about VLAN operation on Cisco Catalyst switches is true?


A.      When a packet is received from an 802.1Q trunk, the VLAN ID can be determined from the source MAC address and the MAC address table.

B.      Unknown unicast frames are retransmitted only to the ports that belong to the same VLAN.

C.      Broadcast and multicast frames are retransmitted to ports that are configured on different VLAN.

D.      Ports between switches should be configured in access mode so that VLANs can span across the ports.


Correct Answer: B




Refer to the topology shown in the exhibit. Which ports will be STP designated ports if all the links are operating at the same bandwidth? (Choose three.)




A.      Switch A – Fa0/0

B.      Switch A – Fa0/1

C.      Switch B – Fa0/0

D.      Switch B – Fa0/1

E.       Switch C – Fa0/0

F.       Switch C – Fa0/1


Correct Answer: BCD




Refer to the exhibit. How should the FastEthernet0/1 ports on the 2950 model switches that are shown in the exhibit be configured to allow connectivity between all devices?




A.      The ports only need to be connected by a crossover cable.

B.      SwitchX(config)# interface fastethernet 0/1

SwitchX(config-if)# switchport mode trunk

C.      SwitchX(config)# interface fastethernet 0/1

SwitchX(config-if)# switchport mode access

SwitchX(config-if)# switchport access vlan 1

D.      SwitchX(config)# interface fastethernet 0/1

SwitchX(config-if)# switchport mode trunk

SwitchX(config-if)# switchport trunk vlan 1

SwitchX(config-if)# switchport trunk vlan 10

SwitchX(config-if)# switchport trunk vlan 20


Correct Answer: B




Refer to the exhibit. A frame on VLAN 1 on switch S1 is sent to switch S2 where the frame is received on VLAN 2. What causes this behavior?




A.      trunk mode mismatches

B.      allowing only VLAN 2 on the destination

C.      native VLAN mismatches

D.      VLANs that do not correspond to a unique IP subnet


Correct Answer: C




Which three statements about RSTP are true? (Choose three.)


A.      RSTP significantly reduces topology reconverging time after a link failure.

B.      RSTP expands the STP port roles by adding the alternate and backup roles.

C.      RSTP port states are blocking, discarding, learning, or forwarding.

D.      RSTP provides a faster transition to the forwarding state on point-to-point links than STP does.

E.       RSTP also uses the STP proposal-agreement sequence.

F.       RSTP uses the same timer-based process as STP on point-to-point links.


Correct Answer: ABD




At which layer of the OSI model is RSTP used to prevent loops?


A.      physical

B.      data link

C.      network

D.      transport


Correct Answer: B




What does a Layer 2 switch use to decide where to forward a received frame?


A.      source MAC address

B.      source IP address

C.      source switch port

D.      destination IP address

E.       destination port address

F.       destination MAC address


Correct Answer: F




Refer to the exhibit. Which statement is true?




A.      The Fa0/11 role confirms that SwitchA is the root bridge for VLAN 20.

B.      VLAN 20 is running the Per VLAN Spanning Tree Protocol.

C.      The MAC address of the root bridge is 0017.596d.1580.

D.      SwitchA is not the root bridge, because not all of the interface roles are designated.


Correct Answer: D




Which two benefits are provided by creating VLANs? (Choose two.)


A.      added security

B.      dedicated bandwidth

C.      provides segmentation

D.      allows switches to route traffic between subinterfaces

E.       contains collisions


Correct Answer: AC

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