多项选择题
A. LSAs from other routers
B. Beacons received on point-to-point links
C. hello packets
D. Routing tables received from neighbors
E. SAP packets sent by other routers
F. TTL packets from exclusive routers
单项选择题 In a point-to point network, which address are OSPF hello packets sent to?（）
单项选择题 The Testking router is running both RIP and IGRP, and the same route is learned by this router from both of these methods. However, when you issue the command"show ip route" you see only the IGRP route, and not the RIP route. Why is this?（）
单项选择题 Which one of the following answer choices below is true regarding the OSPF topology database?（）