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1. How Traffic Moves
over the Internet
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2. How Traffic Moves
over the Internet 1
⇨ For most of us, the Internet starts
at our modems.
⇨ When your modem dials into your Inte
rnet service provider, it connects t
o a special router called an access
concentrator.

3. How Traffic Moves
over the Internet 2
⇨ High-speed leased lines connect the
POPs to the ISP's main data center.
⇨ Most ISPs provide free email service
for their clients, using email serve
rs located at the ISP's data center.

4. How Traffic Moves
over the Internet 3
⇨ Each ISP must have a high-speed conn
ection to one of the major Internet
backbones.
⇨ All the major backbones are intercon
nected,so that if one fails,the othe
rs automatically pick up the traffi
c.

5. How Traffic Moves
over the Internet 4
⇨A growing number of home users get t
heir Internet access from their loca
l cable TV company using cable modem
service.
⇨ Many private businesses are connecte
d to the Internet, often using busin
ess-class services from an ISP.

6. How Traffic Moves
over the Internet 5
⇨ Some of us just can't live a plugged
-in life anymore.
⇨ Several wireless Internet access usi
ng wireless PDA devices such as the
Palm Vll.

7. How Traffic Moves
over the Internet 6
⇨ The Internet wouldn't be very inters
ting without content, and most of th
at content comes from Web servers.
⇨ There providers use heavy-duty serve
r Pcs connected to very high-speed d
ata connections to provide a very hi
gh level o service and reliability.

8. 実現へ
⇨ 実現に向けての説明を行ってください
⇨ 参加者の状況にも考慮を加えてください

9. 意義
⇨ 自分の見解を示してください
⇨ 参加者の見解を求めてください
⇨ 重要な点を挙げてください

10. まとめ
⇨ 結果をまとめてください
⇨ 要求事項を指示してください
⇨ 質問に答えてください
⇨ 終わりの挨拶をしてください