This routing approach is called Packet Switching.

这种路由方法称为分组交换。

Well, there are satellites relays and digital packet switching, and laser devices which transmit over fibre-optic cables.

嗯， 有卫星中继和数字分组交换，以及通过光纤电缆传输的激光设备。

In fact, the threat of nuclear attack is why packet switching was developed during the cold war!

事实上，核攻击的威胁是冷战期间开发分组交换的原因！