【问题3】 在网关计算机/etc/sysconfig/network-scripts/目录中有以下文件,运行某命令可以启动网络,该命令是 (9) ,其命令行参数是 (10) 。 ifcfg-eth0 ifupifup-sit ifcfg-lo ifup-aliasesifup-si ifdown ifup-cipcb ifup-wireless ifdown-aliases ifup-ippp init.Ipv6-global ifdown-cipcb ifup-ipv6 network-functions ifdown-ipppifup-ipxnetwork-functions-ipv6 ifdown-ipv6ifup-isdn ifdown-isdnifup-plip ifdown-postifup-plusb ifdown-ppp ifup-post ifdown-sit ifup-PPP ifdown-sl ifup-routes