单项选择题
If an ethernet port on a router was assigned an IP address of 172.16.112.1/20, what is the maximum number of hosts allowed on this subnet?（）
A.1024 B.2046 C.4094 D.4096 E.8190
多项选择题 Whichtwopracticeshelpsecuretheconfigurationutilitiesonwirelessaccesspointsfromunauthorizedaccess?(Choosetwo.)（）
单项选择题 WhatwillanEthernetswitchdoifitreceivesaunicastframewithadestinationMACthatislistedintheswitchtable?（）
多项选择题 WhichofthefollowingarekeycharacteristicsofPPP?(Choosethree.)（）
