Network Modification

$$Address the following items:

$1)$ What are network layers?$$

$2)$ What is the OSI Model?$$

$3)$ What is the TCP$/$IP stack?$$

$4)$ Are there any other layering models$/$stacks$/$implementations$?$

$5)$ Why is a layering approach taken in networking?$$

$6)$ What is meant by a client$/$server network?$$

$7)$ How does it differ from a peer$-$to$-$peer network?$$ What is a server?$$

$8)$ What is a service?$$

$9)$ Is your router a server?$$

$10)$ Is your computer a server?$$

$11)$ What is Zeroconf?$$

$12)$ What is a host?$$

$13)$ What is a node?$$

$14)$ What are network topologies?$$

$15)$ What are bus networks?$$ Ring networks?$$ Star networks?$$ Tree networks?$$ Mesh networks?$$

$16)$ Are there any other network topologies?$$

$17)$ Is there a difference between physical and functional topologies?$$

$18)$ Which topology is best?$$

Bonus Question:

$19)$ What is the difference between a Network Hub and a Network Switch?$$ Why would you choose one over the other when looking to expand a network?