多项选择题
A. CIDR
B. Split horizon
C. Authentication
D. Classless masking
E. Hold-down timers
F. Multicast routing updates
G. Path Vectoring
单项选择题 You need to implement the use of a routing protocol that meets the following requirements: 1. Converges quickly 2. Supports VLSM, CIDR, IP, and IPX. 3. Uses minimal bandwidth for routing updates. Which one of the following routing protocols would be the best choice?（）
多项选择题 Which of the following routing protocols do NOT support VLSM (variable length subnet masking)?（）
多项选择题 Which of the following routing protocols support the use of VLSM (Variable Length Subnet Masking)?（）