Goal
Related courses
Planning and rules
Lectures
Recitations
Laboration
Material
Book
Exercises with solutions
Lab instructions
Responsabilities of participants
Goal
Basics
Data communications
How information can be transfered
Protocols
How system functions are performed
Technologies
How systems are built
Services
How the networks are used
Network architectures
How the pieces are put together
Design principles and methods
Introduction to TCP/IP and the Internet
Related Courses
2G1316 (4p) Data communications and computer networks 2G1305 (4p) Internetworking 2G1501 (6p) Communication systems 2G1507 (6p) Communication systems
advanced course 2G1318 (4p) Queuing theory and teletraffic systems 2G1325 (5p) Practical Voice over IP:
SIP and related protocols 2G1330 (5p)
Wireless and mobile
network architectures 2G1332 (5p)
Management of networks and networked systems
2G1333 (4p) Network services and
Internet-based applications Laboratory for Communication Systems, www.lcn.imit.kth.se
Course Planning
Twelve lectures
Nine recitations
One laboration
Homework
Preparation for the laboration
Teachers
Lectures
F 1 - F 10: Peter Sjödin
F 11: Johan Montelius, guest lecturer
F 12: Course summary, Peter
Recitation assistants
Group 1 and 4: Ignacio Más Ivars (English)
Recommendation: MEDIA and I
Group 2 and 5: Henrik Lundqvist (Swedish)
Recommendation : Others (D, E, Med-IT, ...)
Group 3 and 6: (if needed)
Laborations
Héctor Velayos with assistants
Please Note!
Exam March 11
Important messages on the course web
http://www.imit.kth.se/courses/2G1316
Also at the lectures
You are responsible for staying updated!
Lectures and Recitations
F1: Introduction
F2: Layered models
Internet
OSI
F3 and F4 + Ö1 and Ö2: Physical layer and data transfer
Modulation
Coding
Link technologies
F5 + Ö3: Data link layer
Flow control
Error control
Data link protocols
F6 + Ö4: Local Area Networks
Multiple Access
Ethernet (IEEE 802.3) F7 + Ö5: Wide Area Networks
Circuit switching
Packet switching
Virtual circuits
F8 and F9 + Ö6 and Ö7: Internetworking and IP
F10 + Ö8: End-to-end communication
Transport protocols
Applications
F11: Guest Lecture
F12 + Ö9: Summary
Laboration
Purpose
Design and configuration of a computer network
Work with modern Internet equipment
Takes place in Kista (sal 430, KTH Forum)
Groups with two students
Sign up for lab sessions at Studentexpeditionen (STEX), Q building
No later than Jan 26 at 12:00
Homework
Must be completed in order to do the lab!
Deadline: Should be handed in at STEX, Q building, by Jan 26 at 12:00.
Course Material
Book
Behrouz A Forouzan, Data Communications and Networking, 3rd edition, McGraw-Hill. ISBN 0072515848.
Exercises with solutions
Lab instructions
Summary of course modules
Background material
All material (except for the book) is available on the course web
http://www.imit.kth.se/courses/2G1316
Printed version of exercises and lab instructions can be bought at STEX
Your Responsibilities
Search the web
Most information available on the course web http://www.imit.kth.se/courses/2G1316
KTH-student: http://www.kth.se/student
”Läs- och tentamensscheman”
Course responsible can be reached at:
2G1316-17@imit.kth.se
Peter does not reply to mail to any other address!
Ask questions at the lectures!
Be on time for the laborations
And keep the deadline for the homework
Course Committee (Kursnämnd)
Volounteers
D
E
I
Med-IT
MEDIA
Meetings
After a few lectures
End of course
Today’s Lecture
Definitions
Signals
Requirements on communication
Communication networks
Connections and topologies
Network types
Examples of networks
Overview of design and analysis methods
Illustrations in this material are collected from
Behrouz A Forouzan, Data Communications and Networking, 3rd edition, McGraw-Hill.
Information and Data
Information—many meanings
Wikipedia (www.wikipedia.org) lists 5 meanings:
1. Negative entropy—the instructions that are needed to produce order or reduce uncertainty
...
5. Any type of pattern that influences the formation or transformation of other patterns
Data
Representation of information
Symbols with a certain syntax
Another Way to Define Information and Data
Data is a representation of facts, concepts, or instructions in a formalized manner suitable for communication, interpretation, or processing by human beings or by automatic means
Information is the meaning that is currently assigned to data by means of the conventions applied to those data
Dictionary for Information Systems, American National Standards Institute, X3.172—1990
Information
Technical definition
Context known by sender and receiver
The alternatives are well defined
Information represents one alternative
To represent one of N alternatives requires élog2Nù bits
Example: The letters in the Swedish alphabet can be represented by 5 bits (25 = 32)
Information
Time dependent information
Has a certain bit rate or data rate (measured in bits per second, b/s, bit/s, bps)
Time independent information
Consists of a certain amount of bits
Information and Knowledge
Weak relation: information can lead to knowledge
Requires that:
Information has certain qualities
Receiver has capacity to process the information (reflecting)
Increased information flow
Could decrease knowledge by overloading processing capacity
Communication
Sharing or transfer of information
Telecommunication
Communication at a distance
”Tele” is ”far” in Greek
Traditionally speach
Sound, pictures, text, ...
Communications
With an ’s’
“The branch of technology concerned with the representation, transfer, interpretation, and processing of data among persons, places, and machines also known as information systems.”
From www.wikipedia.org
Data communications
”[...] the exchange of data between two devices over some form of transmission medium”
Forouzan
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