单项选择题
A. Allows interfaces to share common IP addresses.
B. Allows an interface to remain up without the aid of keepalives.
C. Allows a router to send routing and not receive updates via that interface.
D. Allows a routing protocol to forward updates that is missing its IP address.
E. Allows a router to receive routing updates on an interface but not send updates via that interface.
多项选择题 Which of the following technologies can be used in distance vector routing protocols to prevent routing loops?（）
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?（）