Homework3

241 views

Published on

0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
241
On SlideShare
0
From Embeds
0
Number of Embeds
1
Actions
Shares
0
Downloads
2
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Homework3

  1. 1. How Traffic Moves over the Internet● Modem● ISP data center● The cable provider● About Palm VII
  2. 2. Modem● A modem is a device that modulates an analog carrier signal to encode digital in formation.● The goal is to produce a signal that can be transmitted easily and decoded to reproduce the original digital data.● Modems are generally classified by the amount of data they can send in a given time unit.
  3. 3. ISP data center● Most ISP offered a free mail service to their clients, and the place was found to the use that mail severed at the data center of ISP.● If one fails, other one automatically settles traffic because each other is connected with all the main spines.
  4. 4. The cable provider● A growing number of home users get their Internet access from their local cable TV company using cable modem service which acts as ISP. Many private businesses connect to the Internet, often using the ISP.
  5. 5. About Palm VII● Palm VII makes it possible for several wireless ISPs to provide wireless Internet access.● This device has the function called Web Clipping. It shows the information the users need.● This device has great security. So, the users can do e-business.
  6. 6. References● Wikipedia http://www.wikipedia.org/● Mobile Central http://www.watch.impress.co.jp/mobile/news/19 99/10/05/palm7.htm

×