today, a gameboy for $50, has more computing power than a cray supercomputer of only 25 years ago....
TRANSCRIPT
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Today, A Gameboy for $50, has more computing power than a Cray supercomputer of only 25 years ago.
• Tom PetersCircle of Innovation
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IT Architecture
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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
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The central core of information technology involves a study of programming languages, algorithms and information structures.
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Describe Information in terms of:
• Accuracy
• Verifiability
• Completeness
• Relevance
• Timeliness
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Computers
• Supercomputer• Main Frame• Mini Computer• PC’s• Thin Clients• Laptops and Notebooks• Palmtops / PDA’s• Smart Cards
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Input Devices
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Output Devices
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Cable Media
• Shielded Twisted Pair
• Unshielded Twisted Pair
• Coax
• Fiber
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Wireless Media
• Microwave
• Satellite
–GEO
–MEO
– LEO• GPS• Radio• Infrared• Cellular
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Networks
• WAN
• LAN
• PAN
• VPN
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LAN
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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
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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
• Layer 6: Presentation Layer
• Layer 7: Application Layer
OSI Example
Business Model
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Equipment
• Repeaters
• Bridges (DSU/CSU)
• Routers
• Hubs / Switches
• Interface Cards (NIC)
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Connectivity Services
• Switched
• Dedicated
• Packet–Modems– Frame Relay
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Connectivity Bandwidth
• DDS• Switched Phone
Networks• 56K• T1• T3• OC3• OC12• OC192
• ATM• ISDN• xDSL• Cable Modems
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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
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Topology
• Bus - Ethernet
• Token Ring
• Star
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Protocols
• TCP/IP • IPX • Netbui• SNMP (Management protocol)• Appletalk• X.25• Z39.50• IPNG??
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Why LANs
• Need to share data, software, and hardware
• Centralized management
• Share access to outside sources
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Future
• To distribute expertise not just files
• Remote offices have leadership and expertise - Videoconferencing
• Teleworkers need to be part of the structure
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Acronym Full Name Downstream Upstream Maximum Distance (C.O./user)
IDSL Integrated DSL
128 Kbps 128Kbps 18,000 ft
HDSL High Data Rate DSL
1.544Mbps 1.544Mbps 12,000 ft
SDSL Symmetric DSL
1.544Mbps 1.544Mbps 10,000 ft
ADSL Asymmetric DSL
8Mbps 1Mbps 12,000 ft
RADSL Rate Adapter ADSL
7Mbps 1Mbps 18,000 ft
VDSL Very High Rate DSL
51.84Mbps 2.3Mbps 1,000 ft
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Lawrence Livermore LabBaby 10T
Number of Frames 4 128Nodes per Frame 4 4Number of Nodes 16 512Processors per Node 8 16Number of Processors 128 8,192Speed in MHZ 222 310Mega FLOPS 113,664 10,158,080
Memory in GB 64 4,000
Local Disk in GB 288 10,000Global Disk in GB 1,200 150,000