The _________ is the central router of information and controls access to all of the physical resources of the hardware.

When CDP is used on Ethernet, it sends traffic using a ________ address

A) Multicast B) Broadcast C) Unicast D) Anycast

Early networks were sometimes configured as ____________________ networks, in which computers communicate with and provide services to their "peers."

Fill in the blank(s) with the appropriate word(s).