Cogent is a top 5 global internet service provider founded in 1999. It provides internet access, Ethernet transport, and colocation services to over 21,000 customers worldwide through its extensive fiber network spanning North America and Europe. Cogent carries approximately 25 petabytes of internet traffic per day on its high-capacity network, making it one of the largest providers by traffic volume and network connectivity. It offers reliable, high-speed connectivity at prices significantly lower than competitors.

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2. Who is Cogent? Cogent is a Top 5 Global Internet Service Provider Founded in 1999; publicly traded company (NASDAQ: CCOI). Headquartered in Washington, DC. Serves over 140 major metro markets in North America and Europe. Provides Internet access, Ethernet transport and colocation services. Currently serves approximately 21,000 NetCentric (bandwidth-intensive users) and Corporate customers worldwide. Independent third parties rank Cogent as one of the leading ISPs in the world: Provides High Quality Service and wins business based on PRICE 2 nd largest ISP by AS connectivity ( CAIDA) Carries ~17% of the World’s Internet Traffic (~25 Petabytes per day) Cogent Communications Proprietary and Confidential Pilot House Award Winner for Best Customer Service (Nemertes Research) White Hat Network - “Recognized as a proactive no-spam-tolerance network” (Spamhaus)

3. Network Map 1,420+ On-Net buildings 71% multi-tenant office buildings 29% carrier neutral data centers Agreements with 250+ building owners (REITs) 39 data centers with 328,000+ sq. ft. of space 40,000+ intercity fiber route miles 325+ metro networks; 12,900+ metro fiber miles Longhaul Capacity up to 520 Gbps Transatlantic Capacity over 260 Gbps across multiple cables/routes Interconnected with 2,850+ different networks Cogent Communications Proprietary and Confidential

4. Network Map – North America Cogent Communications Proprietary and Confidential

5. Network Map – Europe Cogent Communications Proprietary and Confidential

6. Corporate Customers Cogent Communications Proprietary and Confidential Corporate Accenture Blue Cross Burberry Business Wire Canon C-SPAN CB Richard Ellis CBS Continental Airlines Docs. w/o Borders Edelman Pub. Rel. Estee Lauder Exxon Mobil GA Pacific Corp Gold’s Gym Hearst Magazines IBM Canada KPMG MarthaStewart McKinsey & Co Mitsubishi Int NASCAR Neiman Marcus Northrop Grumman PR Newswire SAP Toshiba America Xerox Ziff Davis Media ‘ 05 ’ 04 ‘ 04 ’ 04 ’ 03 ’ 02 ’ 02 ‘ 07 ‘ 07 ‘ 05 ’ 02 ‘ 05 ’ 02 ’ 03 ‘ 07 ’ 01 ’ 04 ‘ 07 ‘ 06 ’ 03 ’ 04 ‘ 07 ’ 06 ’ 03 ‘ 09 ‘ 04 ’ 04 ’04 ‘ 06 Customer Since Customer Since Law Firms Alston & Bird Arnold & Porter Arent Fox Kintner Baker & McKenzie Baker Botts Bingham McCutchen Cravath Davis Polk Debevoise/Plimpton Fried Frank Fulbright Jaworski Greenberg Traurig Holland & Knight King & Spalding Kirkland & Ellis Latham & Watkins Morrison & Forester McDermott Will Orrick Herrington Pillsbury Winthrop Ropes & Gray Schiff Hardin Sidley Austin Simpson Thacher Steptoe & Johnson Sullivan & Cromwell Weil Gotshal White & Case Wilmer Cutler ‘ 04 ’ 04 ’ 02 ’ 02 ’ 02 ‘ 05 ‘ 04 ‘ 04 ’ 06 ’ 03 ‘ 02 ‘ 06 ’ 03 ‘ 03 ’ 02 ‘ 01 ’ 04 ‘ 06 ‘ 05 ’ 01 ‘ 05 ‘ 05 ‘ 06 ‘ 02 ’ 03 ’ 07 ’ 04 ’ 02 ‘ 08 Customer Since Leading provider to professional services firms Law firms Financial services Consulting services Corporations Financial ABN Amro Adams Harkness & Hill American Express Aegis Financial Australian Trade Bain & Company Bank of America Bell Trading BNP Chicago Brd of Trade Chicago Stock Exch Deloitte & Touche LLP Depository Trust Essex Investment Global Fin. Services GMAC Comm. Mort. Hicks Muse InTrade Jefferies & Company John Hancock JP Morgan KKR MF Global NYSE Prudential Securities Putnam Lovell NBF Sun Trading UBS US Dept of Treasury ‘ 01 ’ 03 ’ 03 ‘ 08 ‘ 07 ’ 04 ’ 01 ‘ 08 ‘ 05 ’ 06 ’ 02 ’ 02 ’ 02 ’ 05 ‘ 07 ’ 02 ’ 02 ‘ 02 ’ 02 ‘ 01 ‘ 05 ‘ 04 ‘ 07 ‘ 05 ’ 02 ’ 03 ’ 08 ’ 04 ’ 05 12,200+ Customer Connections

7. NetCentric Customers Cogent Communications Proprietary and Confidential Application Businesses Apple Computer ‘04 BrightCove ’06 CareerBuilder.com ’07 Citrix ‘05 Comcast ‘07 Digg.com ‘08 E! Entertainment ‘06 Ebay / Shopping.com ‘06 Gannett ‘06 Google ’03 Hypermedia ‘04 IKON Solutions ‘06 Justin.tv ‘07 NFL ‘02 Ofoto ‘05 Rapidtec.de ‘06 Schlund & Partners ‘06 ShutterFly ‘05 Skype ‘06 SlingMedia ’06 Teraspace ‘06 Unipoint ‘02 Viacom ‘06 Voex ‘06 Webazilla ‘08 Yahoo ‘06 YouSendIt.com ‘04 YouTube ‘06 Universities American Univ. Boston Univ. Carnegie Mellon DePaul University Drexel Duquesne Univ. George Wash. Georgetown Univ. Georgia Tech Harvard Univ. Hofstra Univ. John’s Hopkins MIT Pace Univ. Queen’s Univ. Ryerson Univ. Suffolk Univ. Stanford Univ. Temple Tufts University Univ. of Chicago Univ. of Delaware Univ. of Illinois Univ. of Mass. Univ. of Penn Univ. of S. Florida Univ. of Texas Univ. of Toronto Villanova ‘ 03 ‘ 07 ’ 01 ’ 04 ‘ 06 ‘ 05 ’ 03 ’ 02 ’ 03 ’ 02 ‘ 07 ‘ 08 ’ 03 ‘ 04 ’ 02 ’ 04 ’ 03 ’ 02 ‘ 07 ’ 01 ‘ 02 ’ 04 ’ 05 ‘ 04 ’ 02 ’ 04 ‘ 07 ’ 03 ‘ 05 Customer Since Service Providers AboveNet Bell Canada BT Americas Colt Telecom Edge Telecom UK FiberNet Telecom Foliofn Iliad Deltacom JazzTel Jolt Keynote Systems Linx Telecom Looking Glass Ntwks Neuf Telecom Novis ONO Orange Paetec Communications Primus Radio Free Virgin Spirit Telecom T-Online Spain Telkom South Africa Telefonica Teleglobe Tsystems Wanadoo/France Tel Wisper Telecom ‘ 04 ’ 04 ’ 04 ‘ 05 ‘ 07 ’ 05 ’ 03 ’ 06 ’ 02 ‘ 05 ’ 04 ’ 03 ‘ 06 ’ 03 ‘ 05 ‘ 05 ’ 02 ‘ 06 ‘ 05 ’ 03 ’ 03 ‘ 06 ‘ 07 ’ 04 ’ 05 ‘ 03 ’ 06 ‘ 07 ‘ 04 Customer Since Customer Since Leading provider to bandwidth-intensive organizations ISPs Universities Online gamers ASPs 8,700+ Customer Connections

8. Europe - NetCentric “ One of the best price / performance ratios in the market.” “ Good service, fast provisioning …” Customer Comments Are Overwhelmingly Positive Fall 2006 NPS Survey North America - NetCentric “ Reliable connection, reasonable pricing, extensive network, good support.“ “ You’re not going to find a better price anywhere else! It’s true!” “ Cogent is a very professional team. Everything they promised before our signing the contract was delivered on time and hassle free.” North America - Corporate Off-Net “… overall start up process went very smoothly … well informed on each step.” “ ... you keep your clients informed about changes and system maintenance dates ….” “… proactive - they know I'm down … sometimes before I know I'm down …” North America - Corporate On-Net “… price/performance is absolutely mind blowing ... easy sell to upper management …” "... the service is near perfect, lightning fast speed, unparalleled reliability, superior customer service …” "... speed on installs ..." Cogent Communications Proprietary and Confidential

9. Why Customers Choose Cogent Cogent competes primarily with incumbents (ILECs) and resellers offering T1 or T3 connectivity AT&T Verizon / MCI Cogent competes primarily with other backbone suppliers Level 3 Global Crossing Verizon / MCI AT&T FT (in FR) DTAG (in DE) BT (in UK) Telefonica (in ES) Sprint Qwest Cogent Communications Proprietary and Confidential NetCentric Market (Internet Core Backbone) Speed and quality of connection are equivalent Cogent’s price is 50% of market average Price per connection is relatively equivalent Cogent’s quality of connection is substantially superior Cogent offers 65 : 1 throughput advantage (versus a T1) Cogent offers true network independence from telco facilities Corporate Market (Local Distribution) Pricing Dynamics

10. Cogent’s Competitive Advantage Cogent is the Lowest Priced Provider Low cost, efficient network with low utilization of installed capacity $14 billion of invested capital from 13 acquisitions ($4 billion of PP&E) purchased for $60 million More reliable and less costly than IP networks overlaid on traditional telephone networks IP only product set Simple product set with low cost of operations and provisioning Cogent Communications Proprietary and Confidential Cogent Passes Costs Savings onto the Customer

11. Our Products – Dedicated Internet Access Applications Netcentric Customers (ISPs/Content Providers) Deliver high performance to end-users, guaranteed Low ping times and high transfer rates for all types of Internet usage from fractional FastE and up to multiple 10 GigE configurations Corporate Customers High-speed fully dedicated quality Internet access Take connections either in Data Centers as a complement to your world-wide WAN solution or directly at your office premises Delivery On-Net Delivery in Cogent’s 1,420+ On-Net buildings 39 Cogent Data Centers > 420+ Carrier Neutral Data Centers > 1,000+ Corporate Buildings Off-Net Delivery at Customer Premises Features / Technical Characteristics Single world-wide Tier-1 AS 174 BGP or Static Routing Configuration Interfaces Ethernet: FastE, GigE or 10 GigE PDH/SDH/SONET : E1/T1, E3/DS3, STM-N/OC-X Flat or usage-based billing options Options Primary / Secondary DNS Back-Up Mail Server Black Hole Server Full SLA Global Network availability: 100% Packet loss: < 0.1% Latency < 45 ms intra-North America < 85 ms transatlantic < 35 ms intra-Europe Proactive outage notification within 15 minutes Rapid Installation On-Net: 17 days or less Off-Net: Depending on Local Tail provider Customer Support Available 24x7x365 Global Customer-Focused NOC in Washington, DC Local NOCs in Paris, Madrid, Frankfurt Dedicated Internet Access IP Transit

12. Our Products – Ethernet Point-to-Point Applications Netcentric Customers (ISPs/Content Providers) Interconnect distant network locations Remote access to public peering points Guaranteed high-speed throughput Corporate Customers Private and secure full speed LAN-to-LAN extension Enabler for bandwidth intensive distributed applications, Remote storage or Disaster Recovery Available Topologies Point-to-Point, Meshed Network Delivery On-Net Delivery in most of Cogent’s 1,420+ On-Net buildings 39 Cogent Data Centers > 420+ Carrier Neutral Data Centers > 1,000+ Corporate Buildings Off-Net Delivery at Customer Premises Features / Technical Characteristics Ethernet over WDM Reach and Port Based Billing National International Transatlantic Per port (rather than per link) bandwidth assignment VLAN-based Connectivity Flexible assignment of VLAN between ports VLAN tagging acc. to IEEE 802.1q Q-in-Q / Jumbo Frames available in many locations Interfaces Ethernet: FastE or GigE Full SLA Global Network availability: 100% Rapid Installation On-Net: 17 days or less Off-Net: Depending on Local Tail provider Customer Support Available 24x7x365 Global Customer-Focused NOC in Washington, DC Local NOCs in Paris, Madrid, Frankfurt Ethernet Point-to-Point

13. Our Products – Colocation Applications Netcentric Customers (ISPs / Content Providers) Host telecommunications equipment (DC / AC powered) & IT devices (servers, mainframes) in a secure and state-of-the-art data center environment, right in the heart of the Internet Corporate Customers House your primary mission-critical IT environment (servers, mainframes, storage devices) or your disaster recovery environment in a highly secure and perfectly connected data center environment Delivery In one of Cogent’s 39 Data Centers Features / Technical Characteristics Configurations Stand-Alone Footprint / Rack or Cage / Suite Bundle with Internet or Ethernet connectivity Fully Redundant Power Supply AC (110 / 230V) or DC (48V) Redundant UPS Battery Back-Up On-Site Diesel Generators Fire Detection and Suppression Systems Above and below floor smoke heads Central monitoring Inert gas tanks (FM 200) Air Conditioning Temperature and Humidity Control Access Control Intercom and Biometric Keycard systems Helping Hands Option (select locations) Rapid Installation Customer Support Available 24x7x365 Global Customer-Focused NOC in Washington, DC Local NOCs in Paris, Madrid, Frankfurt North America Atlanta, GA (2 locations) Anaheim, CA Boca Raton, FL Boston, MA Chicago, IL (4 locations) Cleveland, OH Columbus, OH Dallas, TX Detroit (Troy), MI Herndon, VA Europe France Paris (2 locations) Lille Nantes Toulouse Grenoble Nice / Sophia-Antipolis (2 locations) Montpellier Strasbourg Bordeaux Rouen Rennes Tours Poitiers Dijon Germany Frankfurt Los Angeles Miami, FL Milwaukee, WI New York, NY Oakland, CA Pittsburgh, PA Vienna, VA Washington, DC Colocation Over 328,000 sq. ft.

14. End-to-End Service Connects directly into your office location Each building or data center receives 2 to 80 Gb of dedicated capacity. You receive an RJ-45 or fiber hand off, creating a “plug and play” installation. Cogent guarantees 17 day installation for On-Net services Cogent’s Network Connects directly to the Server in Your Office Customer Connections Distribution Riser Innerduct OC-48 Metro Ring Delivering an average of 5 Gbps of Dedicated Capacity to Each Building Cabinet Containing Fiber Connection, Router, DC Power, and Battery Back-Up 20 AMP/110 V Dedicated Outlet Cogent Communications Proprietary and Confidential

15. Virtually Unlimited Capacity Dedicated, Non-Oversubscribed Internet Connections Means No QoS is Needed Large capacity network generates ample bandwidth Ample bandwidth eliminates QoS issues like dropped packets and latency Today, Cogent carries approximately 25 Petabytes per day of pure Internet traffic on its network. That is equivalent to a person watching back-to-back movies on the Internet for 3,330+ years continuously. Cogent Communications Proprietary and Confidential

16. ‘ Self Healing’ Ring Architecture Cogent’s award-winning ring design provides physical diversity at the metro and backbone levels. In the event of a fiber cut anywhere on the ring, the routers redirect your traffic around the ring away from the cut, restoring your connectivity from the other direction and ensuring your data is not lost. Ring Architecture Guarantees Connectivity Despite a Fiber Cut Despite fiber cut, your connection remains intact! Cogent Hub Building Cogent Backbone IP over DWDM Metro Ring Multi-Tenant Office Buildings Cogent Backbone What The Ring Looks Like How The Ring Works Dedicated bandwidth is devoted to each building Cogent Communications Proprietary and Confidential

17. Service Level Agreement (SLA) GLOBAL NETWORK AVAILABILITY: 100.0% PACKET SUCCESSS RATE: >99.9% LATENCY: INTRA-NORTH AMERICA <45 ms INTRA-EUROPE <35 ms TRANSATLANTIC <85 ms SERVICE DELIVERY (On-Net): 17 DAYS Cogent maintains 24x7 customer support, with Customer-Focused NOCs in Washington, Paris, Frankfurt and Madrid. We proactively notify our Layer 3 customers within 15 minutes of an outage on their circuit. Cogent Communications Proprietary and Confidential Cogent’s SLA is One of Best in the Industry

18. Peering Cogent’s network directly interconnects with 2,850+ networks, including virtually all major content and access networks in the world. These connections are mostly private and constantly maintained and upgraded to adequate capacity levels. 7.2+ Tbps 5800+ Directly Connected Networks (AS) Peering Capacity Peering Sessions Cogent has the 2nd Largest Peering Program in the World CCOI Cogent Communications Proprietary and Confidential 2850+

19. Cogent Data Centers Cogent owns 39 state-of-the-art data centers where affordable pricing and secure facilities provide you with a great alternative to hosting your own equipment. Cogent also connects to an additional 420+ carrier-neutral colos, providing excellent opportunities for data storage, disaster recovery, data backup and redundancy. Cogent Provides Excellent Data Center Facilities Diesel/Gas Generator Back-Up Raised Flooring to Keep Cabinets Cool and Provide Easy Access to Cables Access Control System to Control & Monitor Entry & Exits Fire Alarm & Suppression System Cogent Communications Proprietary and Confidential

20. Highlights Leading global Internet service provider Peers / Traffic / Price Independent, low-cost international network Network footprint targeted at high traffic locations Very strong balance sheet Experienced management team Substantial network capacity Cogent Communications Proprietary and Confidential

21. Why Buy from Cogent? Cogent’s Low Prices save you money. Cogent’s Big Bandwidth allows you to work faster, better, and smarter. Entrust your Internet to Cogent’s IP Specialists , not telecom general practitioners. Cogent delivers with Quality : Top 5, Tier 1 Provider that carries 17% of the world’s Internet traffic. Best-in-class Quality Network and Customer Support, backed by SLAs with credits. Service Delivery is fast and friendly. ~21,000 Cogent Customers are overwhelmingly fans of our Service. Cogent Communications Proprietary and Confidential