Level 3 CommunicationsInternet2 Community Design Workshop

2006 Level 3 Communications, Inc. All Rights Reserved. 2

Level 3: Who We Are

Premier wholesale provider of services over one of the world’s newest and most advanced network platforms 33,300-mile broadband fiber optic network across the U.S. and Europe

One of the largest Internet backbones in the world

Large and growing number of network routing options

Expanding Metro footprint 4 metro acquisitions recently announced or closed

Almost 22,000 metro/regional route miles

More than 110 unique metro fiber markets

5000+ on-net buildings

14 cable landing stations

Key enabler of VoIP Local VoIP service covers 93% of U.S. population

E-911 VoIP coverage for 91% of U.S. households within the top 25 metro areas

Broomfield Headquarters

2006 Level 3 Communications, Inc. All Rights Reserved. 3

A World-Class Customer Base

Research and academic institutions Government agencies Wireless companies Cable companies Voice Services Providers RBOCs, ILECs, and International PTTs Internet Content Providers Media and entertainment companies

Customers include:

9 of the world’s 10 largest telecom providers

Top 10 U.S. ISPs, which serve 70% of all online users

9 of the 10 largest U.S. cable companies, covering 80% of all cable subscribers in the U.S.

Top 5 wireless service providers in the U.S., with 167 million subscribers

Largest and fastest growing networks rely on Level 3:

2006 Level 3 Communications, Inc. All Rights Reserved. 4

Experience constructing Research and Education networks

Ties to the Education community

Scalability, reach and flexibility: a unique mix

Breadth of solutions Leader in Waves, Fiber, IP, VoIP, Vyvx and Professional Services

Expanding network footprint

Consistent operational superiority

Customer rankings

What Makes Level 3 Different?

2006 Level 3 Communications, Inc. All Rights Reserved. 5

Backbone LeadershipNation’s Largest Next-Generation Network

Yellow

AC-1

Apollo North

Apollo South

Zurich

W orcester

W ilmington

W ichita Falls

W hite Plains

W est Palm Beach

W ashington, D.C.

Tulsa

Tucson

Troy

Toronto

Toledo

Tampa

Stamford

Syracuse

Stratford

Stockholm

St. Louis

Springfield

Springfield

Spartanburg

South Bend

Seattle

Santa BarbaraSan Luis Obispo

San Jose

San Francisco

San Diego

San Antonio

San Bernardino

Salt Lake City

Sacramento

Rochester

Rivers ide

Richmond

Reno

Raleigh

Prov idence

Princeton

Poughkeepsie

Portland

Pittsburgh

Philadelphia

Phoenix

Paris

Orlando

Orange County

Omaha

Oakland

Oklahoma City

Ogden

Norfolk

New York City

New Orleans

New Haven

Newark

Nashville

Munich

Modesto

Minneapolis

Milwaukee

Milan

Miami

Memphis

Melbourne

McAllen

Madrid

Madison

Louisv ille

Los Angeles

LondonLincoln

Little Rock

Leipz ig

Las Vegas

Laredo

Lansing

Karlsruhe

Kalamazoo

Kansas CityJersey City

Jacksonville

Jackson

Indianapolis

Houston

Hartford

Harlingen

Hamburg

Grand Rapids

Greensboro

Green Bay

Geneva

Ft. Lauderdale

Fresno

Frankfurt

Fort W orth

Eugene

El Paso

Dusseldorf

Durham

Detroit

Des Moines

Denver

Daytona Beach

Dayton

Dallas

Cumberland

Corpus Chris ti

ColumbusCologne

Colorado Springs

Cleveland

Cinc innati

ChicagoCheyenne

Charlotte

Bu ffalo

Bryan

Brussels

Boston

Boise

Berlin

Birmingham

Baton Rouge

Baltimore

Austin

Atlanta

AmsterdamAlbany

Akron

Intercity and Metro Transport MarketIntercity Transport MarketIntercity and Transoceanic Network Routes

Level 3 Transport Network

Map updated on February 10, 2006.

2006 Level 3 Communications, Inc. All Rights Reserved. 6

On-going investment in network; even as competitors are scaling back Deployed new platforms at the DWDM, IP and PL switching layers across entire

network during 2005

Overbuilt the vast majority of the network in less than nine months

25% capital investment increase in the long-haul network in 2005 over 2004

Capacity that can scale rapidly to meet demand IP backbone capacity tripled between Q305 and Q106

• More than 470 Gbps of global peering capacity

Next-gen DWDM enables deployment of larger amounts of bandwidth at one time Increments of 100 Gbps

Next-gen DWDM provides roadmap to 40 Gbps waves and 10 GigE LAN PHY

Multi-conduit network allows for quick fiber upgrades

Backbone Leadership: Scalability

2006 Level 3 Communications, Inc. All Rights Reserved. 7

Designed from ground up to support IP and cutting edge technologies 33,000 route miles on long-haul fiber 22,000 routes miles of metro network 150 markets - lit long-haul services 110 markets - lit metro services

Unique network footprint Extensive existing fiber connectivity with the higher education and research

community High degree of routing diversity Interconnects to many of the key bandwidth aggregation points and Regional Optical

Networks WilTel footprint acquisition

Reach will grow further with metro/regional acquisitions Closed: Progress, ICG; announced: Telcove, Looking Glass Over 5000 buildings with fiber connectivity once acquisitions are complete

Combination of multi-conduit and metro fiber allows for easy and inexpensive interconnection

Backbone Leadership: Reach

2006 Level 3 Communications, Inc. All Rights Reserved. 8

Comprehensive portfolio of wholesale backbone services, including: Wavelengths Private Line IP Transit Dark Fiber Professional Services Vyvx - Video Services

Unparalleled experience designing, building and scaling large, backbone networks Expertise to tailor solutions to meet specific customer needs True technical experts who know the Level 3 Network’s anatomy precisely Online access to detailed, geocoded “as-builts” directly from technical experts’ desks —

an industry exclusive

Simplicity Eliminate the need to manage multiple service providers across network layers

and services for all locations Concentrate on core business by leveraging Level 3

to design, build and operate the network

Backbone Leadership: Breadth of Services

2006 Level 3 Communications, Inc. All Rights Reserved. 9

Backbone Leadership: Performance Consistently ensures a high level of end-user performance

Facilities-based intercity and metro networks

Variety of diversity and protection options

Emphasis on diverse entrance facilities, dual gateway designs and no network spurs

Multi-level security in facilities

Very high availability track record

In the last four years:

Private Line installed base grew 8X (CAGR of 70%)

Wavelength installed base grew 7X

[Insert new Level 3 intercity transport map and backhaul

map here.]

End-to-End Backbone Solutions

Transport Protected Network Availability

100.

0000

%

100.

0000

%

99.9

993%

99.9

997%

100.

0000

%

100.

0000

%

100.

0000

%

100.

0000

%

100.

0000

%

99.9

964%

100.

0000

%

100.

0000

%

100.

0000

%

96%

97%

98%

99%

100%

Dec

-04

Jan-

05

Feb

-05

Mar

-05

Apr

-05

May

-05

Jun-

05

Jul-0

5

Aug

-05

Sep

-05

Oct

-05

Nov

-05

Dec

-05

Protected Transport Network Availability averaged 100.0000% - April 2006

Transport Unprotected Network Availability

99.9

981%

98.4

020%

99.9

999%

99.9

762%

99.9

473%

98.8

773%

99.9

954%

99.9

888%

99.5

665%

99.9

459%

99.9

904%

99.9

999%

99.9

999%

96%

97%

98%

99%

100%

Dec

-04

Jan-

05

Feb

-05

Mar

-05

Apr

-05

May

-05

Jun-

05

Jul-0

5

Aug

-05

Sep

-05

Oct

-05

Nov

-05

Dec

-05

Unprotected Transport Network Availability averaged above 99.9821% - April 2006

2006 Level 3 Communications, Inc. All Rights Reserved. 10

Backbone Leadership: IP Performance

Best in class on-net latency Outperform competitors ~ 73% of the time in

route by route comparisons1

Outstanding availability and packet loss Consistently ranked at or near the top in

Keynote statistics

Exceptional global connectivity According to Renesys, Level 3 customers and

peering partners reach more networks than any other provider. 2

An extraordinary community of content and eyeball customers Direct, high performance links to the most

popular destinations Internet destinations More than 50% of our traffic stays on-net We control and can guarantee performance

end-to-end

1 Source: Competitor measurements taken from Keynote and compared route for route with internal Level 3 measurements.

2 Source: http://www.renesys.com/products_services/market_intel/rankings.html

2006 Level 3 Communications, Inc. All Rights Reserved. 11

Backbone Leadership: Industry Recognition

2006 GlobalComm award for Core/Backbone Network Design & Services

2006 Frost and Sullivan Growth Strategy Leadership Award

2005 ATLANTIC-ACM U.S. Wholesale Excellence Award

2005 Internet Telephony Product of the Year Award for E-911 service

2004 World Communications Award for Best Wholesale Carrier

2004 Microsoft Service Excellence Award for Quality (Level 3 cited for “business integrity, openness, and emphasis on customer care”)

2004 Frost & Sullivan Award for Technology Innovation Leadership

2004 Innovation Award from TMC Labs for wholesale VoIP service

Smithsonian Institution recognition as Level 3 as an IP pioneer

2006 Level 3 Communications, Inc. All Rights Reserved. 12

NewNet Physical Network Map

I2 100G Wave FacilityRON-Core Connector

I2 Core NodeRON HubOther Level 3

Wave paths are meant to represent actual physical routing. Paths which are not shown as parallel and adjacent are meant to be physically diverse.

DenverFront Range GP

1850 PearlLevel 3

Kansas CityGPN1100 WalnutLevel 3

Seattle1000 Denny WayLevel 3

Portland1335 NW NorthropLevel 3

SunnyvaleCENIC

1380 KiferLevel 3

Pacific Northwest GP2001 6th Ave

Westin

San Diego

PortlandOregon GP

707 SW WashingtonQwest

San FranciscoSan FranciscoOaklandSacramento

Los AngelesCENIC

600 W 7thEquinix

Santa Barbara

Los Angeles818 W 7th

Level 3

Salt LakeInter-Mountain GP

572 S DeLongLevel 3

AlbuquerqueNew Mexico GP

104 Gold Ave SELevel 3

TulsaOneNet

18 W ArcherLevel 3

HoustonLEARN1201 N I-45Level 3

Dallas

San Antonio Baton RougeLONI9987 BurbankLevel 3

New Orleans

Chicago111 N Canal

Level 3

Detroit

ChicagoCIC/MREN

MERITBOREAS

Internt2710 Lakeshore

Starlight

Atlanta345 Courtland

Tallahassee

Birmingham

AtlantaSLR56 Marietta

Charlotte RaleighNCREN5301 Departure DrLevel 3

PittsburghPittsburgh GP143 S 25thLevel 3 Washington

MAX1755 Old MeadowLevel 3

PhiladelphiaMAGPI401 N BroadLevel 3

New YorkNYSERNET32 A of Americas

New York111 8th

Level 3

CambridgeNOX300 Bent StLevel 3

Tampa

MiamiSouth Florida GP

45 NW 5thLevel 3

Orlando

JacksonvilleFLR4814 Phillips HwyLevel 3

IndianapolisIndiana1902 S East StLevel 3

Hartford

Roche

ster

Buffalo

Cincinnativia 1005 N B St

via 1

075

Tria

ngle

Ct

El Paso501 W Overland

Level 3

35mioverlap

NashvilleTennessee GP2990 Sidco Dr

Level 3

ClevelandTFN4000 ChesterLevel 3

1220 L

Albany

10

Ogden

Boise

Omaha

Austin

2006 Level 3 Communications, Inc. All Rights Reserved. 13

Degree 3 Node: Chassis Diversity for High Availability

MC

M

1 2 3 4 5 6 7

Ea

st D

LM

(lay

er 2

)

MC

M

We

st D

LM

(lay

er 2

)

1 2 3 4 5 6 7

We

st-fa

cin

g B

MM

MC

MM

CM

1 2 3 4 5 6 7

We

st D

LM

(lay

er 1

)

MC

M

Ea

st D

LM

(lay

er 1

)

1 2 3 4 5 6 7

Shelf 1 (Main Chassis w/ redundant MCM)

Shelf 3 (Expansion Chassis)Shelf 2 (Expansion Chassis)

Shelf 4 (Expansion Chassis)

Ea

st-fa

cin

g B

MM

Leave Slots 3-6

Empty

Leave Slots 3-6

Empty

So

uth

DL

M (la

ye

r 2)

So

uth

DL

M (la

ye

r 1)

Ea

st D

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(lay

er 4

)

MC

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st D

LM

(lay

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1 2 3 4 5 6 7S

ou

th-fa

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MM

MC

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1 2 3 4 5 6 7

We

st D

LM

(lay

er 3

)

MC

M

Ea

st D

LM

(lay

er 3

)

1 2 3 4 5 6 7

Shelf 5 (Expansion Chassis)

Shelf 6 (Expansion Chassis)

Leave Slots 3-6

Empty

So

uth

DL

M (la

ye

r 4)

So

uth

DL

M (la

ye

r 3)

Shelf 7 (Expansion Chassis)

BMM- band mux and optical amplifier for 400Gbps

Channels 1-10 Channels 11-20 Channels 21-30 Channels 31-40

Channel: OC-192 or, 10GigE LAN PHY

2006 Level 3 Communications, Inc. All Rights Reserved. 14

Transport Network — AvailabilityProtected Transport Network Availability averaged 100.0000% April 2006

Unprotected Transport Network Availability consistently averages above 99.9821% in April 2006

Transport Unprotected Netw ork Availability

99.9473%98.8773%99.9954%99.9888%99.5665%99.9459%99.9904%99.9999%99.9999%99.9969%99.9996%99.9925%99.9821%

0.0000%

10.0000%

20.0000%

30.0000%

40.0000%

50.0000%

60.0000%

70.0000%

80.0000%

90.0000%

100.0000%

Apr-05May-05Jun-05Jul-05Aug-05Sep-05Oct-05Nov-05Dec-05Jan-06Feb-06Mar-06Apr-06

Transport Protected Netw ork Availability

100.0000%100.0000%100.0000%100.0000%100.0000%99.9964%

100.0000%100.0000%100.0000%100.0000%100.0000%99.9947%

100.0000%

0.0000%

10.0000%

20.0000%

30.0000%

40.0000%

50.0000%

60.0000%

70.0000%

80.0000%

90.0000%

100.0000%

Apr-05May-05Jun-05Jul-05Aug-05Sep-05Oct-05Nov-05Dec-05Jan-06Feb-06Mar-06Apr-06