Basic Network and Routing Concepts

4 important questions on Basic Network and Routing Concepts

Subinterfaces also overcome some limitations of NBMA networks. Name 2:

- Point-to-point suninterfaces
Each subinterface, which provides connectivity between to routers, uses its own subnet for addressing.

- Point-to-multipoint subinterfaces
One subnet is shared between all virtual circuits.

Why are IGP protocols not directly established over the Internet?

- All IGPs establish adjacency only between directly connected neighbors.
- Within an organization, you can use private addressing while packets that are sent to the internet get routed only if public ip addressing is used
- Internet as transport medium cannot be trusted.

Name the difference between a Layer 2 and a Layer 3 MPLS VPN Solution

- Layer 2 MPLS VPN backbone solution is providing theLayer 2 service across the backbone, where R1 and R2 are connected together directly using the same IP subnet. Neighbor adjacency is established between the R1 and R2.

- Layer 3 MPLS VPN backbone solution is providing the Layer 3 service across the backbone, where R1 and R2 are connected to ISP edge routers. A separate IP subnet is used on each side. In this case adjacency between R1 and the ISP and between R2 and the closest service PE
  • Higher grades + faster learning
  • Never study anything twice
  • 100% sure, 100% understanding
Discover Study Smart

Which requirement determine the choice between L2 or L3 selection?

- L2 MPLS VPN is useful for customers who run their own L3 infrastructure and require L2 connectivity from the SP. (managing own routing information)

- L3 MPLS VPN is appropriate for customers who prefer to outsource their routing to a SP. SP maintains and manages routing info for the customer sites

The question on the page originate from the summary of the following study material:

  • A unique study and practice tool
  • Never study anything twice again
  • Get the grades you hope for
  • 100% sure, 100% understanding
Remember faster, study better. Scientifically proven.
Trustpilot Logo