Basic Network and Routing Concepts
4 important questions on Basic Network and Routing Concepts
Subinterfaces also overcome some limitations of NBMA networks. Name 2:
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?
- 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 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
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Which requirement determine the choice between L2 or L3 selection?
- 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
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