【名词&注释】
路由器(router)、急性期(acute stage)、疟原虫(plasmodium)、数据包(packet)、目的地(destination)、不规则(irregular)、网络连接(network connection)、环孢素(cyclosporine)、抗感染治疗(anti-infection treatment)
[单选题]An internet is a combination of networks connected by (1). When a datagram goes from a source to a (2), it will probably pass many (3) until it reaches the router attached to the destination network. A router receives a (4) from a network and passes it to another network. A router is usually attached to several networks. When it receives a packet, to which network should it pass the packet? The decision is based on optimization: Which of the available (5) is the optimum pathway?
A. C