单项选择题 What is the purpose of configuring the router as a PPPoE client?（）

单项选择题 Which DSL encapsulation method requires client software running on the end - user PC that is directly connected to a DSL modem?（）

多项选择题 You have implemented mutual route redistribution between OSPF and EIGRP on a border router. When checking the routing table on one o f the OSPF routers within the OSPF routing domain, you are seeing some, but not all of the expected routes. Which two things should you verify to troubleshoot this problem?（）