Which two statements are characteristics of a distance vector routing protocol?（）

• A、RIP is an example of distance vector routing protocols
• B、Updates are periodic and include the entire routing table
• C、Routing updates are sent only after topology changes
• D、The protocol can be useful in hub-and-spoke and hierarchical networks
• E、Convergence is usually faster than with link state protocols
• F、Each router has its own view of the topology