多项选择题
A.addresses chosen by a company to communicate with the Internet
B.addresses that cannot be routed through the public Internet
C.addresses that can be routed through the public Internet
D.a scheme to conserve public addresses
E.addresses licensed to enterprises or ISPs by an Internet registry organization
单项选择题 Which protocol provides a method of sharing VLAN configuration information between switches（）。
多项选择题 Which of the following are types of flow control (Choose three.)（）。
单项选择题 How should a router that is being used in a Frame Relay network be configured to avoid split horizon issues from preventing routing updates？（）