Router (Router), also known as gateway device (Gateway), is a network that is used to connect multiple logic，The so -called logical network represents a separate network or a subnet。When the data is transmitted blackjack live from one subnet to another subnet，can be completed by the router's routing function。So，The router has the function of judging network address and selecting IP paths，It can be in multiple network interconnection environments，Establish flexible connection，It can be connected to various seed networks with completely different data grouping and medium access methods，The router only accepts information about the source station or other routers，An interconnection device with network layer。

CISCO router

Precautions for Using the experimental box:

1、During the experimental blackjack online process，Pay attention to the matching of the connection line and the device interface。

2. Waiting for the router to start completely and then perform the next step.