单项选择题
A.Web browsing
B.downloading a program
C.streaming television shows
D.on-line shopping
多项选择题 Which three statements describe the User Datagram Protocol (UDP)?（）
多项选择题 Which three statements describe the Transmission Control Protocol (TCP)?（）
单项选择题 You are the network administrator setting up the IP network for a new branch office. You need at least 5 networks with 25 hosts each. You have been allocated a /24 network.Which prefix length will satisfy the given requirements?（）