COMP 2330 3 units Data Communications and Networking

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COMP 2330 (3 units)Data Communications and
Networking

• Name Dr. Joseph NG
• Office R707 (Sir Run Run Shaw Building)
• Phone [phone] Email jng_at_comp.hkbu.edu.hk
• HomePage http//www.comp.hkbu.edu.hk/jng
• Name Dr. Hon Wah Tam
• Office R713 (Sir Run Run Shaw Building)
• Phone [phone] Email tam_at_comp.hkbu.edu.hk
• TA Name Mr. Calvin Kin Cheung Hui
• Email kchui_at_comp.hkbu.edu.hk

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Subject Outline

• Objectives
• To introduce the major concepts of data
  communication and computer networks
• To provide an introduction to network
  programming
• Network functions and protocols with reference to
  the ISO Reference Model and the existing local
  area networks will be studied.
• Textbook
• Stallings, William, Data and Computer
  Communications, 5th Edition, Prentice Hall, 1997.
• Assessment
• Continuous assessment (30)
• Examination (70)

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Subject Outline (continue)

• Passing grade and Grade Distribution (Guidelines)
• A (10 /- 5)
• B (50 /- 10)
• C, D, F (40 /- 15)
• Average of this class should be either B- or C.
• To pass this subject, the final exam should be
  higher than 30.
• To get the A grade, the overall score should be
  higher than 70.
• Each person, each semester can have one
  supplementary exam.
• The highest grade for supplementary exam is D.
• A warning for those copy cats
• Whoever get caught in copying homework and other
  assignments, the instructor has the right to
  penalize his/her grade when necessary.

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Computer Networks --- An Overview

• Computer Network
• A computer network is a communication system that
  allows computers to exchange information with
  each other in a meaningful way.
• Computer networks may link computers that are all
  of the same type (homogeneous networks), or they
  may link computers of several different types
  (heterogeneous networks)
• Size of the network same room, same floor, same
  building, same campus, city, region/country, or
  across international boundaries.
• Three abbreviations computer networks
• LAN Local area network offers high speed
  communication (10Mbps) between computers within a
  limited area.
• WAN Wide area network can vary considerably.
  Usually covers the whole country. WAN may be
  provided by post, telephone and telegraph
  organizations. WAN also includes radio and
  satellite.
• MAN Metropolitan area network is not yet
  well-defined. They offer a simple, fast way to
  link different organizations for the exchange of
  information with a similar degree of flexibility
  to that provided by LANs.

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The International Standards Organization
Reference Model of Open System Interconnection
(ISO OSI model)
Host A
Host B
Application
1
Message
interfaces
Presentation
2
Message
interfaces
Session
3
Message
Transport
4
Subnet
Message
5
Boundary
Network
Packet
Data Link
6
Frame
Physical
7
Bit
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Applications on Computer Networks

• Sharing Resources
• Computing power (main-frames, super-computers)
• Databases (Air-line reservation, Banking
  accounts)
• Archives (wuarchive, ftp.cica.indiana.edu,
  ftp.cs.cuhk.hk, ftp.cdrom.com)
• Printers (line printer, laser printer, image
  printer)
• Scanners
• File server
• Program libraries (X-windows, g lib, Motif)
• Expensive software (CASE tools, CAD/CAM)
• Data Communication
• File Transfer Protocol (FTP upload/download)
• News Server (notesfile, Bulletin board)
• Email
• Voice mail, video mail, facsimile (FAX)
• World Wide Web Server
• talk, IRC, ICQ