imt 546 wan technologies
TRANSCRIPT
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IMT 546
WAN Technologies
By
Bob Larson
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R
outers
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Switching vs. Routing
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Wide Area Net works (WANs)
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Wide Area Net work (WAN)
Links net works or devices over larger geographicalarea Can be across town or across the globe
Connections can be part-time or full-time MODEM & ISDN are traditional part-time (on-demand)
E1/T1s, Frame Relay are traditional full-time net works
Cable and DSL are newer full-time (always-on) net works
Typically involve a 3rd-party service provider
WAN bandwidth determined by service provider Greater bandwidth the greater the monthly cost
Connections are often Serial (64kbps-45Mbps) Typically slower than the LANs they connect
Typically connect to LANs via a router
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Routers and WAN switches
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WAN Service Providers
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WAN Links Connect LANs
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Typical Corporate WAN Net works
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WAN Distribution Net work
Access Links
Distribution Links
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Dedicated Connections (Leased Lines)
Typical connections on a dedicated net workmay operate at the following speeds: 56 kbps
64 kbps
T1 (1.544 Mbps) US / E1 (2.048 Mbps) European
T3 (44.736 Mbps) US / E3 (34.064 Mbps) European
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Dedicated Links (New Kids on the Block)
Digital Subscriber Line (DSL)
Asymmetric Digital Subscriber Line (ADSL)
High Data-Rate Digital
Subscriber Line (HD
SL)
Symmetrical Digital Subscriber Line (SDSL)
Very High Data Rate Digital Subscriber Line(VDSL)
Cable modems
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Packet-Switched Net works
X.25 enhancement on POTS
Frame relay time-share alternative to leased lines
ATM (cell relay) high speed through uniformity
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Circuit-switched Connections
Asynchronous Dialup (POTS) Plain old telephone service (POTS)
ISDN Basic Rate Interface (BRI)
ISDN Primary Rate Interface (PRI)
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Integrated Services Digital Net work (ISDN)
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Wireless WAN Alternative
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2.4GHz Antennas for Long Range
13.5 dBi YagiDistances over
7.3
miles @ 2 Mbps11.7 Km @ 2 Mbps
3.6 miles @ 11 Mbps
5.8 Km @ 11 Mbps
21 dBi Solid DishFor distances up to
25+ miles @ 2 Mbps40+ Km @ 2 Mbps
20.5 miles @ 11 Mbps
33 Km @ 11 Mbps
Note: Distances include5
0 feet of low loss cable and1
0 dB fade margin
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NoWY R Net work Fife
Link
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WAN Line Types and Bandwidth
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MCI UUNet
Spans more than 4,500 Points of Presence (PoPs) throughout North America, Europe and the Pacific Rim, and is arguably the world's topInternet backbone. Link
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Link
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Link
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Latency
Link
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Technology Convergence
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What is AVVID?
Architecture for Voice, Video and Integrated Data Provides the framework (strategy) for today's Internet
business solutions Provides the road map for combining business and
technology strategies into one cohesive model Delivers the e-business infrastructure and intelligent
net work services that are essential for rapid deployment of emerging technologies and new Internet businesssolutions
Provides an enterprise foundation that combines IPconnectivity with security, high availability, and quality of service
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IP Telephony (VoIP)
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IP Video Conferencing
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Wireless LANs (WLANs)
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Cisco AVVID Security
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Virtual Private Net works (VPNs)
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Content Net working
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IP Contact Center
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Storage Net working
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Fin