Refer to the exhibit. After attempting to enter the configuration that is shown in router RTA, an administrator receives an error and users on VLAN 20 report that they are unable to reach users on VLAN 30. What is causing the problem?
- The no shutdown command should have been issued on Fa0/0.20 and Fa0/0.30.
- There is no address on Fa0/0 to use as a default gateway.
- Dot1q does not support subinterfaces.
- RTA is using the same subnet for VLAN 20 and VLAN 30.
| Explanation & Hint:
The error users on VLAN 20 are experiencing in reaching users on VLAN 30 is likely due to the fact that RTA is using the same subnet for both VLAN 20 and VLAN 30. In the configuration provided in the exhibit, both subinterfaces for VLAN 20 and VLAN 30 are assigned IP addresses from the same subnet:
With a subnet mask of 255.255.255.224 (/27), both of these IP addresses fall within the same subnet range (192.168.3.32 to 192.168.3.63), which means that the router cannot distinguish between the two separate VLANs as they do not have unique IP subnets. To resolve this issue, the administrator needs to assign a unique IP subnet to each VLAN to ensure proper routing between them. |