第19题: [多项选择]在OSPF中,Link State ID是LSA所描述的那部分链路的标识,下列对于不同类型LSA的Link State ID描述正确的是()。 A. Router LSA的Link State ID是该路由器所连接的网段 B. Network LSA的Link State ID是所描述网段上DR的端口IP地址 C. Network Summary LSA的Link State ID是所描述的目的网段地址 D. ASExternal LSA的Link State ID是所描述的ASBR的Router ID 参考答案:B, C
第25题: [单项选择]What is the man’s problem A. He has missed his flight. B. His flight will arrive late. C. He has to take another flight. D. His flight has been cancelled. 参考答案:B 答案解析:[听力原文] W: I’m sorry.Your flightwill be delayed till tonight. M: That means I can’t leave this