单项选择题
A．Java RMI B．CORBA C．DCOM D．Java Applet
A．touch/var/state/dhcp/dhcpd.leases B．address/var/state/dhcp/dhcpd.leases C．nat/var/state/dhcp/dhcpd.leases D．resolve/var/state/dhcp/dhcpd.leases
A．网卡与网卡 B．网卡与交换机 C．网卡与集线器 D．交换机的以太口与下一级交换机的UPLINK口