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 Layer 6: Presentation Layer Layer 7: Application Layer OSI Example Business Model

Equipment Repeaters Bridges (DSU/CSU) Routers Hubs / Switches Interface Cards (NIC)

Connectivity Services Switched Dedicated Packet –Modems –Frame Relay

Connectivity Bandwidth DDS Switched Phone Networks 56K T1 T3 OC3 OC12 OC192 ATM ISDN xDSL Cable Modems

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

AcronymFull NameDownstreamUpstreamMaximum Distance (C.O./user) IDSL Integrated DSL 128 Kbps 18,000 ft HDSL High Data Rate DSL 1.544Mbps 12,000 ft SDSL Symmetric DSL 1.544Mbps 10,000 ft ADSL Asymmetric DSL 8Mbps1Mbps12,000 ft RADSL Rate Adapter ADSL 7Mbps1Mbps18,000 ft VDSLVery High Rate DSL 51.84Mbps2.3Mbps1,000 ft

Lawrence Livermore Lab