3_Inter VLAN Routing Flashcards
What is the role of a default gateway in a network?
A default gateway routes packets destined for other networks outside the local subnet.
What was the primary limitation of legacy inter-VLAN routing in large networks?
It requires multiple physical interfaces on a router, one for each VLAN, leading to inefficiency and scalability issues.
Describe how router-on-a-stick achieves inter-VLAN routing.
Router-on-a-stick uses a single physical router interface configured as a trunk link. Subinterfaces are created for each VLAN, and each subinterface is assigned an IP address and configured for VLAN tagging.
What are Switch Virtual Interfaces (SVIs), and why are they used?
SVIs are virtual layer 3 interfaces associated with VLANs on a multilayer switch. They allow routing between VLANs within the switch without requiring external routing devices.
Explain the concept of routing in a network. Why is it necessary?
Routing is the process of forwarding packets between different networks. It is necessary because devices within one network cannot directly communicate with devices in another network without a routing device.
How do routing devices connect different networks?
Routing devices have multiple network interfaces, each connecting to a different IP network. They use routing tables to determine the appropriate path for packets destined for external networks.
Why are multilayer switches considered a scalable solution for inter-VLAN routing?
They can perform routing internally at hardware speed, support a large number of VLANs, and eliminate the need for external routing devices.
What is the purpose of the no switchport command, and when is it used?
The no switchport command is used to configure a physical switch port as a layer 3 routed port instead of a layer 2 switchport. It is typically used when connecting to a single host, such as a server or router, where no VLAN tagging is required.
