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?

空白（1）处应选择（）

A.modems

B.routers

C.switches

D.computers

（）是指现行法律法规赋予此项业务范围的金融机构开展的同业资金借出和借入业务。

A、同业借款

B、同业存款

C、同业代付

D、同业存单