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.
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Answers Explanation & Hints: The problem is that RTA is using the same subnet for VLAN 20 and VLAN 30. The IP address assigned to interface Fa0/0 is 192.168.1.1/24, which means it belongs to the 192.168.1.0/24 network. Both VLAN 20 and VLAN 30 are configured with the same IP network address, 192.168.1.0/24. This will cause routing problems because RTA will not be able to differentiate between the two VLANs. The IP network addresses assigned to VLAN 20 and VLAN 30 need to be different.