多项选择题
A. Spanning Tree Protocol
B. Shortest path first tree
C. Link-state advertisements (LSA)
D. Hold-down timers
E. Split horizon
F. VRRP
单项选择题 What parameters must you specify when you enable EIGRP routing?（）
单项选择题 Which of the following answer choices is an additional parameter which must be supplied before the IGRP routing process can initialize?（）
单项选择题 Which one of the following parameters is the very first thing that needs to be configured as part of the IGRP routing process?（）