Review for NG10c: Internet Connection Options
Answers are at the bottom of the document.

Objectives~

Describe TCP/IP stack
Discuss types of connection to the Internet:
POTS
ISDN
(A)DSL
T1
T3
TV cable

Questions~

	1.	What is a "TCP/IP stack"?

	2.	Name at least 3 ways of connecting a home or office computer to the Internet:

	3.	What does the acronym POTS mean?

	4.	What are the advantages of connecting to the Internet using POTS?

	5.	What are the disadvantages of connecting to the Internet using POTS? 

	6.	What does the acronym ISDN mean?

	7.	What are the advantages of connecting to the internet using ISDN?

	8.	What are the disadvantages and limitations of connecting to the internet using ISDN?

	9.	What does the acronym ADSL mean?

	10.	What are the advantages of connecting to the Internet using (A)DSL?

	11.	What are the disadvantages and limitations of connecting to the Internet using (A)DSL?

	12.	What type of use is T1 service likely to be used for?

	13.	What are the disadvantages of connecting to the internet using T1?

	14.	What are the advantages of connecting to the internet using T1?

	15.	What type of use is T3 service likely to be used for?

	16.	What are the disadvantages of connecting to the internet using T3?

	17.	What are the advantages of connecting to the internet using T3?

	18.	What are the disadvantages of connecting to the internet using TV cable?

	19.	What are the advantages of connecting to the internet using TV cable?






Answers ~

	1.	Software that translates requests from your Web browser, e-mail program, or other application into TCP/IP Internet commands, and handles incoming TCP/IP packets. 
	2.	Any of the following: POTS, ISDN, DSL, TV cable, satelite, radio frequency.
	3.	Plain Old Telephone Service.
	4.	Wide availability and low cost.
	5.	Slow speed; occupying a phone line while using Internet.
	6.	Integrated Services Digital Network
	7.	Speed higher than POTS, cost lower than DSL, only one phone line needed.
	8.	Cost higher than POTS, speed lower than DSL, availability limited by linear distance from telephone exchange.
	9.	Asymmetric Digital Subscriber Line
	10.	Speed greater than any other method, depending on service packages offered by local telephone company.
	11.	Higher cost, availability limited by linear distance from telephone exchange.
	12.	Organizations, businesses, and (small) Internet service providers.
	13.	For individuals and small organizations, the high cost of T1 service. For large organizations, T1 may not provide enough access for multiple users.
	14.	High speed and capacity compared with all but T3 access.
	15.	Large orgnizations and Internet service providers.
	16.	High cost.
	17.	High speed and capacity.
	18.	In some cases, lack of availability. In other cases, lack of upstream capacity - that is, you need a phone line to send messages out from your computer. In all cases, upstream capacity is less than downstream capacity, and all capacity is shared with neighbors and will decrease as more neighbors use the service.
	19.	Speed much higher than POTS, and download speed potentially higher even than ISDN.