多项选择题
What are two characteristics of RIPv2?（）
A. classful routing protocol B. variable-length subnet masks C. broadcast addressing D. manual route summarization E. uses SPF algorithm to compute path
多项选择题 Which two wireless encryption methods are based on the RC4 encryption algorithm?（）
多项选择题 Which two features did WPAv1 add to address the inherent weaknesses found in WEP?（）
多项选择题 Which three options are valid WAN connectivity methods?（）
