Network Computing

1
Chapter 5

• Network Computing

2
Agenda

• Functions
• Feasibility
• Analysis

3
Network Functions

• Discovery
• Communication
• Collaboration

4
Discovery

• Internet, Web
• Software agents, intelligent agents
• Data warehouse and data mining
• Characteristics
• Open
• Resourceful
• Efficient
• Dynamic

5
Communication

• Internet, Intranet, Extranet
• Real-time, no distance
• Voice, data, video

6
Collaboration

• Groupware, Group decision support systems,
  (GDSS), Intranet, Extranet
• Workflow systems administrative, purchasing,
  production, etc.
• Screen sharing
• Productivity, quality, timely

7
Agenda

• Functions
• Feasibility
• Analysis

8
Enterprise Networking Goals

• Connectivity
• Portability
• Interoperability
• Scalability
• Others?

9
Network Feasibility

• Technology
• Hardware
• Media
• Software
• Protocols
• Operation
• Horizontal, vertical, both
• Culture, level of computing (individual, dept,
  etc.)
• Legal
• International, interstate
• Cost/benefit
• Corporate objectives

10
Agenda

• Functions
• Feasibility
• Analysis

11
Network Analysis

• Open system interconnection (OSI)
• Type
• Topology
• Architecture
• Transmission characteristic
• Protocol
• Interface
• Media

12
Network Analysis

• Lines
• Carrier
• Service
• Security
• Code
• Signal

13
Open system interconnection (OSI)

• Physical layer
• Data link layer
• Network layer
• Transport layer
• Session layer
• Presentation layer
• Application layer

14
Network Types

• Voice or data
• Private branch exchange (PBX)
• Centrex
• LAN, MAN, WAN
• Enterprise
• Internet
• Intranet
• Extranet
• Public, private

15
Network Types

• Valued added
• Packet switching
• Frame relay
• Asynchronous transfer mode (ATM)
• Integrated services digital network (ISDN)
• Digital subscriber line (DSL)
• Fiber distributed data interface
• Virtual private network (VPN)
• Backbone

16
Network Types

• Wireless
• Cellular radio technology
• Mobile computing
• Personal communication system
• Personal digital assistance

17
Network Topologies

• Token ring
• Bus
• Star
• Hierarchical
• Web
• Hybrid

18
Network Architecture

• Client/server
• Peer-to-peer

19
Transmission characteristics

• Speed
• Bits per second (bps)
• Baud rate (Hertz)
• Direction
• Simplex
• Half-duplex
• Full-duplex
• Mode
• Asynchronous
• Synchronous
• Accuracy
• Horizontal
• Vertical
• Cyclic redundancy checking

20
Protocols

• Definition
• Rules procedures for transmission
• Protocol types
• Token passing
• Carrier sense multiple access/collision detection
• Transmission control protocol/internet protocol
  (TCP/IP)
• Telnet
• HTTP

21
Interface

• Transmission interfaces
• Parallel data transfer
• Serial data transfer
• Universal asynchronous receiver/transmitter
• Network interfaces
• Interface card
• Routers
• Bridges
• Gateways

22
Interface

• Modem
• Multiplexer
• Frequency division, time division, statistical
  time division, wavelength division
• Front-end processor
• Concentrator

23
Network Media

• Cable media
• Fiber optics
• Coaxial cable
• Twisted-pair wire
• Shield twisted-pair wire
• Wireless
• Microwave
• Radio
• Infrared
• Satellite

24
Network Lines

• T1, T2, T3, T4, T5
• ISDN
• DSL
• Wireless

25
Network Carriers

• International
• Long distance
• Local
• Wireless
• Internet service provider

26
Network Services

• Types
• In-house
• Outsource
• Services
• Data
• Voice
• Video
• Wireless

27
Security

• Transmission
• Hardware
• Software
• Personnel
• Procedure
• Inventory
• Physical Logical

28
Others

• Codes
• ASCII
• EBCDIC
• Unicode
• Error corrections
• ACK acknowledge
• NAK negative acknowledge
• Impact
• Health, job, organization, social
• Issues
• Ethics, privacy, free speech, copy right,
  management

29
Points to Remember

• Functions
• Feasibility
• Analysis

30
Discussion Questions

• Why does an organization need a reliable network?
• What are the general selection criteria for a
  network?
• What kind networks are useful to an university
  such as CSUS?
• What kind networks are needed by a company such
  as Intel?

31
Discussion Questions

• Design a network system for a university in terms
  of the following items
• Types
• Topologies
• Media
• Lines
• Carrier
• Services
• Security
• Health
• Privacy

32
Assignment

• Review chapter technology guides 1-2 chapters
  1- 5
• Read chapter technology guide 4
• Group assignment 1 due date 10/2/01
• Research paper