200-301: Cisco Certified Network AssociateDemo

By Cisco · Question Mode

QuestionQ849

IP Connectivity

Refer to the exhibit. The SW1 and SW2 Gi0/0 ports have already been configured. An engineer has these requirements:

  • Allow all PCs to communicate with one another at Layer 3.
  • Configure untagged traffic to use VLAN 5.
  • Disable VLAN 1 from being used.

Which configuration set meets these requirements?

Question Image

  • A SW1#interface Gi0/1switchport mode trunkswitchport trunk allowed vlan 5,7,9,108switchport trunk native vlan 5interface Gi0/2switchport mode trunkswitchport trunk allowed vlan 5,7,9,108SW2#interface Gi0/1switchport mode accessswitchport access vlan 7interface Gi0/7switchport mode trunkswitchport trunk allowed vlan 7,9,108
  • B SW1#interface Gi0/1switchport mode trunkswitchport trunk allowed vlan 5,7,9,108switchport trunk native vlan 5interface Gi0/2switchport mode accessswitchport trunk allowed vlan 7,9,108SW2#interface Gi0/1switchport mode accessno switchport access vlan 1switchport access vlan 7interface Gi0/7switchport mode trunkswitchport trunk allowed vlan 7,9,108switchport trunk native vlan 5
  • C SW#1 -interface Gi0/1switchport mode trunkswitchport trunk allowed vlan 5,7,9,108switchport trunk native vlan 5interface Gi0/2switchport mode trunkswitchport trunk allowed vlan 5,7,9,108SW2#interface Gi0/1switchport mode accessswitchport access vlan 7interface Gi0/7switchport mode trunkswitchport trunk allowed vlan 5,7,9,108switchport trunk native vlan 5
  • D SW1#interface Gi0/1switchport mode trunkswitchport trunk allowed vian 5,7,9,108interface Gi0/2switchport mode trunkswitchport trunk allowed vlan 7,9,108SW2#interface Gi0/1switchport mode trunkswitchport trunk allowed vlan 7interface Gi0/7switchport mode trunkswitchport trunk allowed vlan 5,7,9,108
Explanation

The correct configuration must make the SW1–SW2 link and the SW1–R1 link trunks, allow the needed VLANs end to end for inter-VLAN routing, and set the native VLAN to 5 so untagged frames are placed in VLAN 5 instead of the default VLAN 1. VLAN 1 is prevented from being used by excluding it from the trunk allowed list and by changing the native VLAN from 1 to 5. The host-facing port for the PC in VLAN 7 must remain an access port assigned to VLAN 7. Option C is the only set that matches all of those requirements.

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