Agenda

1
Agenda

• Go over the quiz
• Networking basics
• Applying this to the real world

2
What concepts are introduced in this chapter?
3
What concepts are introduced in this chapter?

• The need to share
• How we can share
• LANs
• Changes in telecommunication infrastructure
• Internet
• Issues

4
Why share?
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Sharing is good...

• Reduces overhead capital
• sharing printers, databases
• Keeps everyone abreast of what is happening in
  the organization
• Allows groups to maximize their talents
• best can be assigned to groups without time or
  distance limitations

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How do we share?
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Telecommunications

• Connects computers and computer equipment
• Allows data/information to be sent worldwide

8
A basic Point-to-Point communication model

• Someone to make up the message/file
• Someone who will use the message/file
• Something to actually send/receive it
• Something over which it can be sent
• Some type of rules for communicating

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A basic Point-to-Point communication model
Channel
Creater
Transmitter / Receiver
Transmitter / Receiver
User
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Communication model

• Creator - something to make the data
• User - something to use the data
• Sender/receiver - i.e. a modem
• Channel - coax, fiber, microwave
• Protocols
• Between creator user
• Between transmitter / receiver

11
Communication Tasks (for pt-pt and multipoint)

• Transmission system utilization
• Interfacing
• Signal generation
• Synchronization
• Exchange management
• Error detection and correction
• Flow control

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Communication Tasks (for pt-pt and multipoint)

• Addressing
• Routing
• Recovery
• Message formatting
• Security and protection
• Network management

13
Network design concern

• Availability
• Reliability
• Maintainability
• Survivability
• Performability
• Testability
• How easily the above can be verified

14
Channel capacity

• The data rate
• The bandwidth
• Noise
• Error rate

15
LANs

• What are LANs?
• What goes into a LAN?
• How do LANs help with sharing resources?

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LANs

• A collection of computers and computer equipment
• Networked (connected) via some (combination of)
  media

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What goes into a LAN?
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What goes into a LAN?

• Nodes
• any computer device connected to the LAN
• servers, clients, routers, bridges
• The network
• star, bus, ring
• twisted pair, coax, fiber, microwave
• Software / protocols
• allow nodes to communicate

19
How do LANs help?

• How do they allow us to share?
• What type of sharing are we talking about?

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LANs allow us to

• Manage growth in personnel
• Manage growth in applications
• Integrate resources
• Any node on the network is physically accessible
  by all nodes

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I/S
22
FAA
I/S
23
I/S
24
I/S
FAA
25
LANs

• Token Ring
• Bus

26
How is the telecommunication infrastructure
changing?
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How is the telecommunication infrastructure
changing?

• End users are getting access to faster
  connections, or faster media
• ISDN
• DSL
• ATM
• Cable modems
• This concept is referred to as the last mile

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The Internet

• How does data travel over the Internet?

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IP vs. Circuit Switching
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Circuit Switching

• Point-to-point circuit is set up
• All data is sent
• No other sender/receivers can use any of the
  links
• Circuit is terminated when finished

31
IP

• Break message into equal sized packets
• Each packet is addressed separately
• Each packet takes a different route from sender
  to receiver
• Multiple sender/receiver pairs can utilize the
  same link

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The Internet

• What changes are occurring?

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The Internet

• Common network for most end-users (from home)
• Steadily growing
• actual numbers are difficult to find (believe)
• Potential for additional internets

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Question

• What are the issues surrounding global
  telecommunications?
• You are the CIO and are told the company has
  merged with a multi-national firm. What issues
  are you now looking at or worried about?

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Issues

• What are the big issues with telecommunications?

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Issues

• Whole range of technical issues
• Which applications, interfaces, speeds and
  protocols are supported
• Cultural
• Distribution, expected support levels/hours
• Legal / political
• Transborder data flows, PTTs vs. RBOCs

37
Electronic Business

• How does telecommunications tie into this
  concept?
• Issues
• Disintermediation
• Support
• Competition analysis
• Strategy marketing
• Taxes

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The Production Chain

• The process by which your product or service is
  created
• Many steps may now be bypassed
• Which ones, and why, are issues for the
  organization

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Types of Electronic Business

• B2B
• Business to business
• B2C
• Business to customer
• C2C
• Customer to customer
• What are the issues with each?

40
Customer Support

• Prepurchase
• Find product/pricing information
• Purchase
• Ease of purchase
• Security
• Postpurchase
• Complaints

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Advertising Marketing

• Contrast with traditional stores
• Measuring the effects of your advertising or
  marketing campaigns
• Capturing sales data
• Capturing customer information
• Mining customer information

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What Do You Need to Start an E-business?
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Support For E-business

• Someone to house your site
• Someone to design/support your site
• Some type of payment functionality
• The internet
• Clients with sufficient technology

44
Potential Pros of E-Business

• Disintermediation
• Far less start-up capital required
• Far less operating expense
• 24 hour operations
• Others?

45
Potential Cons of E-Business

• More risk as the concept isnt fully understood
• Less marketing information available
• Different strategy models
• Far more perceived risk from investors
• More difficult to get funding
• No proven track record

46
The Data Communications Industry A Series of
Interacting Components
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Put this to use

• http//www.networkworld.com/news/2009/121409-veriz
  on-business-lights-up-100g.html
• http//www.networkworld.com//news/2010/021710-fcc-
  wants-high-speed-internet-for.html
• http//www.networkworld.com/columnists/2010/011310
  bradner.html