单项选择题 What is required to enable fragmentation of large FTP packets when voice quality on the network is affected by FTP transfers?（）

单项选择题 The following exhibit displays the NetFlow statistics for a CIS router, which will be helpful for a network administrator to collect IP traffic information. Which two numbers separately refer to the percentage of packets sized between 32 and 64 bytes and the number of flows in progress?（）

单项选择题 You work as a network administrator in your company. Communication inside the company is ensured by network environments, such as GET VPN, Dynamic Multipoint VPN and Ethernet. Which PIN architecture is applicable in those environments?（）