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IT Architecture

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IT Architecture Powered By Docstoc
					Today, A Gameboy for $50, has
more computing power than a
Cray supercomputer of only 25
years ago.


            • Tom Peters
              Circle of Innovation
IT Architecture
Although there is always a need
for improved technology, the
critical resource is intelligent
resourceful people who can relate
business needs to technology.

         James J. O’Connor
The central core of information
technology involves a study of
programming languages,
algorithms and information
structures.
Describe Information in terms of:
•   Accuracy
•   Verifiability
•   Completeness
•   Relevance
•   Timeliness
               Computers
•   Supercomputer
•   Main Frame
•   Mini Computer
•   PC’s
•   Thin Clients
•   Laptops and Notebooks
•   Palmtops / PDA’s
•   Smart Cards
Input Devices
Output Devices
             Cable Media
•   Shielded Twisted Pair
•   Unshielded Twisted Pair
•   Coax
•   Fiber
          Wireless Media
 • Microwave
 • Satellite
    – GEO
    – MEO
    – LEO
• GPS
• Radio
• Infrared
• Cellular
          Networks
•   WAN
•   LAN
•   PAN
•   VPN
LAN
              WAN’s
• Network which incorporates
  extended geographical boundaries
• Network which has a centralized
  point of data exchange
• Network which joins remote
  networks in increase productivity
• Network which extends existing
  resources
        Networking Standards –
             OSI Model
•   Layer 1: Physical Layer
•   Layer 2: Data Link layer
•   Layer 3: Network Layer
•   Layer 4: Transport Layer
•   Layer 5: Session Layer        OSI Example
•   Layer 6: Presentation Layer   Business Model
•   Layer 7: Application Layer
               Equipment
•   Repeaters
•   Bridges (DSU/CSU)
•   Routers
•   Hubs / Switches
•   Interface Cards (NIC)
      Connectivity Services
• Switched
• Dedicated
• Packet
  – Modems
  – Frame Relay
     Connectivity Bandwidth
• DDS              •   ATM
• Switched Phone   •   ISDN
  Networks         •   xDSL
• 56K              •   Cable Modems
• T1
• T3
• OC3
• OC12
• OC192
LAN
"A data communications system
allowing a number of independent
devices to communicate directly
with each other, within a moderately
sized geographic area over a
physical communications channel of
moderate data rates."
                          IEEE
             Topology
• Bus - Ethernet
• Token Ring
• Star
                Protocols
•   TCP/IP
•   IPX
•   Netbui
•   SNMP (Management protocol)
•   Appletalk
•   X.25
•   Z39.50
•   IPNG??
            Why LANs
• Need to share data, software, and
  hardware
• Centralized management
• Share access to outside sources
                Future
• To distribute expertise not just files
• Remote offices have leadership and
  expertise - Videoconferencing
• Teleworkers need to be part of the
  structure
Acronym Full Name    Downstream   Upstream   Maximum
                                             Distance
                                             (C.O./user)
IDSL    Integrated   128 Kbps     128Kbps    18,000 ft
        DSL
HDSL    High Data    1.544Mbps    1.544Mbps 12,000 ft
        Rate DSL
SDSL    Symmetric    1.544Mbps    1.544Mbps 10,000 ft
        DSL
ADSL  Asymmetric     8Mbps        1Mbps      12,000 ft
      DSL
RADSL Rate Adapter   7Mbps        1Mbps      18,000 ft
      ADSL
VDSL    Very High    51.84Mbps    2.3Mbps    1,000 ft
        Rate DSL
Lawrence Livermore Lab
                       Baby        10T
Number of Frames             4          128
Nodes per Frame              4            4
Number of Nodes             16          512
Processors per Node          8           16
Number of Processors       128        8,192
Speed in MHZ               222          310
Mega FLOPS             113,664   10,158,080

Memory in GB               64        4,000

Local Disk in GB           288      10,000
Global Disk in GB        1,200     150,000

				
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posted:9/24/2011
language:English
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