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問答題What are the three main types of networks that must be considered when defining a security policy？

1.問答題What is the purpose of the Route Tag field in the RIPv2 message？

2.問答題You are subneting in the network， out of network address，what’s feature can add one more address？

3.問答題Explain Route Aggregation in BGP.

4.問答題In BGP， we can use Route Reflector and full mesh. Why should we use these？

5.問答題Neither external routes nor interarea routes will inject into this area. What is the area type and how can you configure it？