多项选择题 Which of the following routing protocols support the use of VLSM (Variable Length Subnet Masking)?（）

多项选择题 Which of the routing protocols shown below support both VLSM and route summarization?（）

单项选择题 You need to choose a routing protocol for a new Testking network. This network will be running IP, IPX, and Appletalk, and you wish to utilize only one routing protocol. Which one would be the best choice?（）