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Questions and Answers
Which inter-VLAN method allows a PC to access a web server on another network while providing the highest bandwidth at Layer 3?
Which inter-VLAN method allows a PC to access a web server on another network while providing the highest bandwidth at Layer 3?
What method is required for inter-VLAN routing in a network with more than 1000 VLANs?
What method is required for inter-VLAN routing in a network with more than 1000 VLANs?
In a router-on-a-stick inter-VLAN routing topology, where is the IP address assigned?
In a router-on-a-stick inter-VLAN routing topology, where is the IP address assigned?
What is a primary advantage of using a multilayer switch for inter-VLAN routing?
What is a primary advantage of using a multilayer switch for inter-VLAN routing?
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Which of the following describes a router-on-a-stick configuration?
Which of the following describes a router-on-a-stick configuration?
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What is the primary role of SVIs in a Layer 3 switch?
What is the primary role of SVIs in a Layer 3 switch?
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What happens if a standard Layer 2 switch is used instead of a Layer 3 switch in a network with multiple VLANs?
What happens if a standard Layer 2 switch is used instead of a Layer 3 switch in a network with multiple VLANs?
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Which of the following best describes the function of a trunked interface?
Which of the following best describes the function of a trunked interface?
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What configuration is necessary to allow communication between VLAN 10 and VLAN 20 using legacy inter-VLAN routing?
What configuration is necessary to allow communication between VLAN 10 and VLAN 20 using legacy inter-VLAN routing?
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What is the primary downside of using multilayer switches for inter-VLAN routing?
What is the primary downside of using multilayer switches for inter-VLAN routing?
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Which method of inter-VLAN routing involves configuring subinterfaces on a router?
Which method of inter-VLAN routing involves configuring subinterfaces on a router?
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What is a limitation of the router-on-a-stick inter-VLAN routing method?
What is a limitation of the router-on-a-stick inter-VLAN routing method?
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What does the number 20 represent in the command 'encapsulation dot1Q 20'?
What does the number 20 represent in the command 'encapsulation dot1Q 20'?
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When a network administrator enters the 'no switchport' command, what are they trying to achieve?
When a network administrator enters the 'no switchport' command, what are they trying to achieve?
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What switch port mode should be configured to connect a switch to a router for router-on-a-stick inter-VLAN routing?
What switch port mode should be configured to connect a switch to a router for router-on-a-stick inter-VLAN routing?
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Which of the following inter-VLAN routing methods is designed for scalability and efficiency?
Which of the following inter-VLAN routing methods is designed for scalability and efficiency?
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What does inter-VLAN routing through a multilayer switch primarily eliminate?
What does inter-VLAN routing through a multilayer switch primarily eliminate?
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Which design structure uses a single highway with separate lanes for each VLAN?
Which design structure uses a single highway with separate lanes for each VLAN?
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Study Notes
Inter-VLAN Routing Methods
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Multilayer Switch (Highest Bandwidth): Provides Layer 3 routing internally, acting as a default gateway for all VLANs. Crucial for high-bandwidth and traffic in large networks.
- Hardware-accelerated routing makes it exceptionally fast, handling significant traffic volumes without bottlenecks.
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Layer 3 Switch (Scalability): Ideal for networks with 1000+ VLANs. Handles inter-VLAN routing within the switch using SVIs and hardware-accelerated routing, preventing external bottlenecks.
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Router on a Stick: Uses subinterfaces for each VLAN, each with its own IP address. This allows routing between VLANs via a single physical router interface.
- Subinterfaces act as a default gateway, creating connections between VLANs.
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Legacy (Router with Multiple Interfaces): Requires a separate physical router interface for each VLAN, connecting to each network. Not scalable for many VLANs.
Router-on-a-Stick Configuration
- IP Assignment: IP addresses are assigned to subinterfaces representing individual VLANs, each functioning as a default gateway for the respective VLAN.
Choosing the Right Method
- Multilayer switches offer best performance, but are more costly than the router-on-a-stick method.
- High latency for routing is a potential disadvantage of using multilayer switches compared to router-on-a-stick.
- Router-on-a-Stick is good for smaller networks but has limitations regarding scalability as the number of VLANs grows.
- Legacy method offers simple configuration but is limited in scalability, becoming impractical with networks holding 1,000+ VLANs.
Trunk Ports
- Trunk Mode: Necessary for connecting a switch to a router in a router-on-a-stick configuration. Carries traffic for multiple VLANs to make multiple connections seamless.
VLAN Configuration Considerations
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VLAN ID: The VLAN ID used in encapsulation commands (dot1Q) directly defines each distinct VLAN.
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Port Configuration:
no switchportcommand on switch ports converts them to routed ports, necessary to connect to a router for proper inter-VLAN routing.
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Description
Explore the various inter-VLAN routing methods, including multilayer switches, layer 3 switches, router-on-a-stick, and legacy routers. Understand their applications, benefits, and limitations for network scalability and performance. This quiz is designed for networking students and professionals alike.
