Chapter 5 Understanding Internetworking Infrastructure

1
Chapter 5 Understanding Internetworking
Infrastructure

• Chaoyang University of Technology
• Ying Chieh Liu

2
Background

• 75 of al IT dollars go to infrastructure
• Information technology infrastructure lies at the
  heart of most companies operating capabilities.
• Internetworking technologies provide a low-cost
  way to connect virtually everyone on the same
  network and present new possibilities for
  addressing business computing needs.
• New business models enabled by the new service
  possibilities have emerged.

3
Moores Law
The performance of memory chips doubled every 18
to 24 months
4
Evolution of Corporate IT Infrastructure
5
Metcalfes Law
The usefulness of a network increases with the
square of the number of users connected the
network
6
The Bandwidth Explosion
7
A Simple LAN
8
An Example of A WAN
9
Servers in a Typical E-commerce Configuration
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A Modern Data Center
11
Technological elements of facilities

• Buildings and physical spaces
• Network conduits and connections
• Power
• Environmental controls
• Security

12
Operational Characteristics of Internetworks

• Internetworking technologies an based on open
  standards (TCP/IP, HTTP)
• Internetworking technologies operate
  asynchronously
• Internetworking communications have inherent
  latency
• Internetworking technologies are naturally
  decentralized
• Internetworking technologies are scalable

13
Business Implications of Internetworking

• Better data, better decisions
• Improved process visibility
• Improved process efficiency
• From make-and-sell to sense-and-respond
• Drawback??