The term "Networks" is used by a variety of people to describe a collection of ancient constructs which are integral with the underpinnings of reality.  

Some of the common elements of these network is that they are accreted strands of calcified reality which connect different "locations" within reality together. Different networks may have first been constructed in different eras, and even within a network there may be newer and old parts of the structure.  The networks are a unifying element that cohere the varying local consensus in different parts of reality into a single, unified consensus.  Over the eons, different networks have also been leveraged for accomplishing specialized functions which are critical to the current form of the Prime.

Because they are reality constructs the appearance of the networks can also be highly influenced by the nature of the being using/travelling them and the manner in which they were accessed.

Some examples of  networks include....

• The Jade Gate Network linking Yygsdrasil to all of the disparate points in the prime

• The Halls of the Dead

• The Golden Empire Network

• The Fortu (LWoN) Network

• etc.