Transcript Lecture 0 and 1

CT 1505
Recent Developments in Networks
Instructor: Dr. Najla Al-Nabhan
2014
Course Overview
Course Title: Recent Developments
in Networks
Course Code: CT 1505
Course Level: Fifth
Course Co-requisite: CT1505
Lecture Time: Sunday 9:00 am12:00 pm
Credit Hours: 3(3+ 0)
Course Instructor
Name
Dr. Najla
Al-Nabhan
Rank
Assistant
Professor
Office
Email
Number and Office Hours
Address
Location
Office #: 321
2nd Flour,
Sunday 12-3
Bldg 1,
Tuesday 12-3 nalnabhan@
Olishah
Wednesday 11- KSU.EDU.SA
Campus,
3
KSU
Course Syllabus
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Aimed to impart
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Facts of network technologies developments (historical
background)
New and old network technologies;
Recent advanced network technologies;
Recent advancements indicators;
Life cycle of networking standards;
Future expectations;
User acceptance factors to recent developments;
Evaluation of recent applications.
Grading Overview
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Homework Assignments: 10%
Quizzes: 15%
Class Participation: 5%
Mid-terms: 30%
Final Exam: 40%
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One Quiz and/or tutorial per week, schedule will be announced soon
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Course Textbook and References
Text Book
 Jim Kurose and Ross “Internetworking: A top-down
Approach”
 Bertsekas and Gallagher “Data Networks”
Support Material
 Selected papers and book chapters.
 Technical reports and videos.
References
 Lectures, Discussion Groups, Tutorials, Problem Solving,
Debates, etc.
Lecture 1: Facts of network technologies
developments
(A historical background)
Computer Networks
Computer networks? A group of interconnected computers
-Represent a logical Result of the evolution of two of the most important
scientific and technical branches of modern civilization – Computing and
Telecommunications technologies.
From Batch Processing Toward Time-Sharing
Queuing
Theory
1957
1. Centralized system based on mainframe
2. Multi-terminal System
3. Time sharing
The Necessity: Time and Resource Sharing
“Time sharing tried to make it possible for research institutions to
use the processing power of other institutions computers when
they had large calculations to do that required more power, or
when someone else's facility might do the job better”
Networking History
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Origins of Internet are hazy, visit www.nethistory.info for interesting
reading
1961: Kleinrock - queuing theory shows effectiveness of packet-switching
1964: Baran - packet-switching in military applications for survivable
networks
1967: ARPAnet conceived by Advanced Research Projects Agency
1969: First ARPAnet node operational
 Prof.Kleinrock sends a message across from UCLA to Stanford
1972:
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ARPAnet demonstrated publicly
NCP (Network Control Protocol) first host-host protocol
First e-mail program
ARPAnet has 15 nodes
Networking History...
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1970: ALOHAnet satellite network in Hawaii (CSMA
developed), later connects to ARPANet
1973: Bob Metcalfe’s PhD thesis proposes Ethernet
(CSMA/CD developed)
1974: Cerf and Kahn - architecture for interconnecting
networks: the word “Internet” makes its appearance from
Cerf’s writings
Networking History...
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Time sharing became difficult since different machines
had different operating systems, versions and programs
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However, these led to development of Internet
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Reference Models
Vinton Cerf. Bob Kahn, Bob Braden and Jon Pestel
developed TCP/IP
Cerf and Kahn’s internetworking principles:
 minimalism, autonomy - no internal changes required
to interconnect networks
 best effort service model
 stateless routers
 decentralized control define today’s Internet architecture
Networking History...
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1978: TCP/IP v4 was released
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Aimed to interconnect different kinds of networks
1979: ARPAnet has 200 nodes
1983: deployment of TCP/IP in ARPAnet
1983: SMTP e-mail protocol defined
1983: DNS defined for name-to-IP-address translation
1985: FTP protocol defined
1988: TCP congestion control
100,000 hosts connected to confederation of networks
Networking History...
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Early 1990’s: ARPAnet decommissioned
Early 1990s: WWW
 Hypertext
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(1945 Bush: “As We May Think” article, Ted Nelson, Engelbert, Andries in 1968 )
HTTP: Tim Berners-Lee develops WWW an Internet based hypermedia initiative
at CERN, specifies URLs, HTTP and HTML which became basis for today’s
WWW
 1994: Mosaic (Univ. of Illinois), later Netscape the major browsers until late
1990’s
 late 1990’s: commercialization of the WWW, with introduction of HTTPS ecommerce is realized
Late 1990’s:
 50 million computers on Internet
 100 million+ users
 backbone links running at 1 Gbps
The ARPANET
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Growth of the ARPANET (a) December 1969. (b) July 1970.
(c) March 1971. (d) April 1972. (e) September 1972.
Hosts on the Web
Internet Users: By Countries
Internet Users: By language
Internet Content: By language
Questions
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Which appeared earlier than the other: WANs or LANs?
Why?
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Reference:
http://media.wiley.com/product_data/excerpt/83/EHEP0009/EH
EP000983.pdf
Summaries this video in Arabic and English
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https://www.youtube.com/watch?v=9hIQjrMHTv4