Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Lecture 3: CSCI E-1 Spring 2013
Search
Tommy MacWilliam
February 25, 2013
Education
0
500
Lecture 3: CSCI E-1 Spring 2013
Tommy MacWilliam
February 25, 2013
Tweet
Share
More Decks by Tommy MacWilliam
See All by Tommy MacWilliam
Lecture 9: CSCI E-1 Spring 2013
tmacwill
0
320
Lecture 8: CSCI E-1 Spring 2013
tmacwill
0
460
Lecture 6: CSCI E-1 Spring 2013
tmacwill
1
460
Lecture 7: CSCI E-1 Spring 2013
tmacwill
0
540
Lecture 5: CSCI E-1 Spring 2013
tmacwill
1
600
Incorporating Version Control into Programming Courses
tmacwill
1
110
Lecture 4: CSCI E-1 Spring 2013
tmacwill
0
410
Lecture 2: CSCI E-1 Spring 2013
tmacwill
0
810
Lecture 1: CSCI E-1 Spring 2013
tmacwill
0
320
Other Decks in Education
See All in Education
ハワイアン航空 ステータスへの道 #HAairstudy
maroon1st
0
130
失敗しないISMS取得 - コンサルティング会社の選び方_サンプル【LRM 情報セキュリティお役立ち資料】
lrm
0
240
とある EM の初めての育休からの学び
clown0082
1
2.6k
Ch4_-_Partie_1.pdf
bernhardsvt
0
110
Introduction - Lecture 1 - Advanced Topics in Big Data (4023256FNR)
signer
PRO
1
1.7k
Why Did Douglass Change His Mind?
oripsolob
0
460
OCIでインスタンス構築してみた所感
masakiokuda
0
170
環境・社会理工学院 建築学系 大学院入試について|Science Tokyo(東京科学大学)
sciencetokyo
PRO
0
270
(モブ)エンジニアが伝えるアウトプット活動のススメ!! #カンリーLT
masakiokuda
2
270
【2024 DojoCon】懇親会LT
teba_eleven
0
120
系統性を意識したプログラミング教育~ガチャを実装しよう~
asial_edu
0
240
日本電子専門学校ネットワークセキュリティ科_学科紹介.pdf
ccyc
0
720
Featured
See All Featured
The Language of Interfaces
destraynor
156
24k
Embracing the Ebb and Flow
colly
84
4.6k
The Pragmatic Product Professional
lauravandoore
33
6.5k
How To Stay Up To Date on Web Technology
chriscoyier
790
250k
Navigating Team Friction
lara
183
15k
GitHub's CSS Performance
jonrohan
1030
460k
The MySQL Ecosystem @ GitHub 2015
samlambert
251
12k
What's in a price? How to price your products and services
michaelherold
244
12k
How to Think Like a Performance Engineer
csswizardry
22
1.4k
Bash Introduction
62gerente
611
210k
No one is an island. Learnings from fostering a developers community.
thoeni
21
3.2k
Building a Modern Day E-commerce SEO Strategy
aleyda
38
7.2k
Transcript
Computer Science E-1 Lecture 3: Internet
From last time...
http://youtu.be/j84eEjP-RL4
Review: March 4
http://youtu.be/9ntPxdWAWq8
traceroute cnn.com
Clients v. Servers
Routers
Network
None
None
None
Internet Service Provider
None
LAN
WAN
None
traceroute reddit.com
IP Address
10.251.202.239
4,294,967,296
“640K ought to be enough for anybody”
IPv4
IPv6
http://www.worldipv6launch.org/
2001:0db8:85a3:0042: 1000:8a2e:0370:7334
340,282,366,920,938,463,463,374, 607,431,768,211,456
http://samsclass.info/ipv6/ exhaustion.htm
http://www.google.com/ipv6/ statistics.html#tab=ipv6-adoption
Private IP Address
10.*.*.* 172.16.*.* 192.168.*.*
NAT
Device Private IP Public IP Source Port Macbook 10.0.0.1 74.125.26.228
1000 iPhone 10.0.0.2 74.125.26.228 1001 iPad 10.0.0.3 74.125.26.228 1002
NAT Request • request from 10.0.0.1 reaches router
NAT Request • request from 10.0.0.1 reaches router • router
looks up source port for 10.0.0.1
NAT Request • request from 10.0.0.1 reaches router • router
looks up source port for 10.0.0.1 • router changes source IP to 74.125.26.228, adds source port 1000
NAT Request • request from 10.0.0.1 reaches router • router
looks up source port for 10.0.0.1 • router changes source IP to 74.125.26.228, adds source port 1000 • router sends modified request to destination
NAT Response • router receives response to 74.125.26.228 with source
port 1000
NAT Response • router receives response to 74.125.26.228 with source
port 1000 • router looks up IP address for source port 1000
NAT Response • router receives response to 74.125.26.228 with source
port 1000 • router looks up IP address for source port 1000 • router forwards response to original client
http://www.whatismyip.com/
DHCP
DHCP • Client broadcasts “I would like to join”
DHCP • Client broadcasts “I would like to join” •
Server responds “I can help”
DHCP • Client broadcasts “I would like to join” •
Server responds “I can help” • Client requests an IP address
DHCP • Client broadcasts “I would like to join” •
Server responds “I can help” • Client requests an IP address • Server offers client an IP address
DHCP • Client broadcasts “I would like to join” •
Server responds “I can help” • Client requests an IP address • Server offers client an IP address • Client confirms IP address
None
Connection Speeds
None
Wireless Networks
WEP, WPA, WPA2
3G, 4G
Firewall
None
VPN
Domains
DNS
HOSTS.TXT
DNS Server
Root DNS Server
root-servers.org
TLD DNS Server
Authoritative Name Server
Domain Resolution • hosts file?
Domain Resolution • hosts file? • cache DNS server?
Domain Resolution • hosts file? • cache DNS server? •
root DNS server
Domain Resolution • hosts file? • cache DNS server? •
root DNS server • TLD DNS server
Domain Resolution • hosts file? • cache DNS server? •
root DNS server • TLD DNS server • authoritative name server
http://www.simpledns.com/lookup- dg.aspx
None
Net Neutrality
None
http://www.popsci.com/technology/article/ 2010-07/order-seven-cyber-guardians- around-world-now-hold-keys-internet
Configuring DNS
None
DNS Records • NS: name servers • MX: email •
A: IPv4 address • AAAA: IPv6 address • CNAME: domain alias
TLDs
TLD Usage .com Companies .edu Education .gov US Government .info
Information .mil US Military .net Networks .org Organizations
ccTLDs
ccTLDs • bit.ly: Libya • about.me: Montenegro • del.icio.us: US
• nic.tm: Turkmenistan
http://gtldresult.icann.org/
Registrars
URL
http://username:password@ foo.example.com:1234/cs/e1/is.html ?fun=yes&boring=no#awesome
http://username:password@ foo.example.com:1234/cs/e1/is.html ?fun=yes&boring=no#awesome Scheme
http://username:password@ foo.example.com:1234/cs/e1/is.html ?fun=yes&boring=no#awesome Authentication
http://username:password@ foo.example.com:1234/cs/e1/is.html ?fun=yes&boring=no#awesome Domain
http://username:password@ foo.example.com:1234/cs/e1/is.html ?fun=yes&boring=no#awesome Port
http://username:password@ foo.example.com:1234/cs/e1/is.html ?fun=yes&boring=no#awesome Path
http://username:password@ foo.example.com:1234/cs/e1/is.html ?fun=yes&boring=no#awesome Query String
http://username:password@ foo.example.com:1234/cs/e1/is.html ?fun=yes&boring=no#awesome Fragment
Key-Value Pairs
query=cse1&page=3 • client • the query I want is cse1
• the page I want is 3 • server • what query and page should I look for?
q=e&1?
URL Encoding
q=e%261%3F
URI
urn:isbn:9780811822749
http://cse1.net/psets/pset3.pdf
API
http://developer.mbta.com/lib/rthr/ red.json
https://developers.facebook.com/ tools/explorer/
http://youtu.be/Ve7_4ot-Dzs
Summary
Networking • router • IP address • ISP • network
• WAN, LAN • IPv6 • private IP address • NAT • DHCP • 802.11n • 3G, 4G • mbps • firewall • VPN
Domain Name System • DNS • domains • hosts file
• root DNS server • TLD DNS server • authoritative name server • net neutrality • A record • CNAME record • TLD, ccTLD • registrar • URL • URI • API
Computer Science E-1 Lecture 3: Internet