pingwww.aaa.cnPingingwww.aaa.cn[202.117.112.36]with32bytesofdata:.Replyfrom202.117.112.36:Destinationnetunreachable.Replyfrom202.117.112.36:Destinationnetunreachable.Replyfrom2..." />
	某網(wǎng)絡(luò)中PC1無(wú)法訪(fǎng)問(wèn)域名為www.aaa.cn的網(wǎng)站,而其他主機(jī)訪(fǎng)問(wèn)正常,在PC1上執(zhí)行ping命令時(shí)有如下所示的信息:  
	C:>ping www.aaa.cn  
	   Pinging www.aaa.cn[202.117.112.36] with 32 bytes of data:    .
	   Reply from 202.117.112.36: Destination net unreachable.
	Reply from 202.117.112.36:Destination net unreachable.
	   Reply from 202.117.1 12.36:Destination net unreachable.
	   Reply from 202.1 17.112.36: Destination net unreachable.
	   Ping statistics for 202.117.112.36:
	   Packets: Sent=4,Received=4,Lost=O(0% loss),
	   Approximate round trip tunes in milli-seconds:
	   Minimum=0ms, Maximum=0ms, Average=0ms
	造成該現(xiàn)象可能的原因是(53)。
	A.DNS服務(wù)器故障
	B.PC1上TCP/lP協(xié)議故障
	C.遭受了ACL攔截
	D.PC1上hternet屬性參數(shù)設(shè)置錯(cuò)誤
	
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