Q & A on The TCP/IP Layering Model

Q: Can you clearly list the 5 layers of TCP/IP stack. Are the two layer, Network layer & Network Interface layer, different or same?

A: See page 230 in the text: 

		Application
		Transport
		Internet
		Network Interface
		Physical
Q: I am little bit confused about setting up a LAN.

How many ways are there to set up a LAN?

A: Although there are many technologies and products, there is one basic way to ``set up'' the LAN -- connect a set of computers.

Q: How do i connect the whole LAN to the Internet. Is it necessary to connect the router to the LAN to get connected to the Internet?

A: Yes, a router is needed to connect a LAN to the rest of the Internet.