The Value Networking Company 2006 3 30

The Value Networking Company 2006. 3. 30

Contents 1. General Overview 2. KT Global Network 3. KT IP Transit

I. General Overview Ø Brief Introduction and Business Domain Ø Overseas Subsidiaries and Office Ø Expectation in Revenue Growth Ø Broadband Business Ø New Growth Engines II. KT as Global Carrier III. KT IP Transit

Brief Introduction of KT General Overview As of Dec. 2004

Business Domain General Overview

Domestic Affiliates General Overview

Overseas Subsidiaries and Office KT Moscow Office General Overview New Telecom Company Mongolia Telecom KT London Office KT China Co. KT Delhi Office KT Japan, Co. Ltd. KTAI in NJ KT America Inc. KT Dhaka Office KT Hanoi Office KT Philippines Inc. KT Subsidiaries KT Overseas office

Expectation in Revenue Growth General Overview New Engine BB Internet M/S : 50. 9% Mobile M/S : 33. 0% PSTN M/S : 95. 1%

Growth of Broadband Business General Overview

I. General Overview II. KT Global Network Ø KT Overseas Po. Ps Ø KT Global Network Ø Global. Pass III. KT IP Transit

KT Overseas Po. Ps KT as Global Carrier Global Network Overseas Po. P Location - Global. Pass : HK, Tokyo, Singapore, LA, NY, London - Internet : HK, LA, Palo Alto, Seattle, London, Amsterdam, Frankfurt Global. Pass Services - IPLC : Managed End-to-End IPLC Solution - MPLS VPN : Managed End-to-End VPN Solution

KT Global Network KT as Global Carrier Global Network 1 London New York Hong Kong Tokyo Singapore Los Angeles

KT Global Network 2 KT as Global Carrier Global Network

KT Global Network KT as Global Carrier Global Network Submarine Cable Network Landing Cable Systems - APCN, APCN-2, C 2 C, CKC, CUCN, EAC, FEA, FNAL/RNAL, SMW-3 Non-Landing Cable Systems - Americas-1, APC, Atlandtis-2, Can. TAT-3, Can. US-1, CJC, CMC, CNC Columbus-2, JUCN, M-T, NCC, NPC, Odin, Pan. American, Rioja SAT-3/WASC/SAFE, SCCN, SMW-2, TAT-10, TAT-12/13, TGN, TPC-5, T-V-H Global Satellite Network Intel. Satellites - Three over the Pacific Ocean, three over the Indian Ocean Inmar. Satellites - One over the Pacific Ocean, 1(+1 expected) over the Indian Ocean Other Satellites - 2 Asia. Sat, 1 Panam. Sat, 1 Jc. Sat, 1 Telstar, 4 NSS Services - PSTN, IPLC, Broadcasting, VSAT

Global. Pass KT as Global Carrier Global Network Global. Pass IPLC is a worldwide network service with multiple routes Safe connection, stable communication and high speed access availability Offering the customized Service Level Agreement

Global. Pass KT as Global Carrier Global Network Global. Pass MPLS VPN Global. Pass VPN provides the managed IP network solution for multinational corporations Global. Pass VPN offers the bundled solution for Data, Voice, Video Offering the customized Service Level Agreement

I. General Overview II. KT as Global Carrier III. KT IP Transit Ø Kornet Introduction Ø Kornet Network Ø International Backbone Network Ø KT IP Transit Service

Kornet Introduction KT IP Transit KT as Global Carrier Kornet is the brand name of KT Internet backbone service KT launched its Internet service in June 1994 as the first commercial ISP in Asia KT plays a leading role to develop the Internet businesses Subscribers KT is the largest telecom company and ISP in Korea The number of subscribers for Kornet broadband service outnumbers 6. 2 mil users among 12 mil Korea broadband Internet market.

Kornet Network National Backbone Everyone in Korea can access to KORNET - around 100 nodes all over the nation - without any blind spot The local backbone is centralized in Seoul - 2 centers in Seoul - plan to additional center in Busan High bandwidth interconnections - 2 center nodes and 20 main nodes - 5 Gbps to 40 Gbps KORNET domestic backbone bandwidth - 1, 640 Gbps (As of January 2006) - plan to continue upgrades KT IP Transit KT as Global Carrier

Kornet Network KT IP Transit KT as Global Carrier International Backbone KT has high bandwidth connections with most of Asia, US, Europe ISPs - Total Bandwidth for International : 60 Gbps KT operates 7 Global Internet POP - Asia (HK), US (LA, Palo Alto, Seattle), Europe (London, Amsterdam, Frankfurt) KT continues to upgrade IP backbone capacity with very tight upgrade plan - Plan to exceed 100 Gbps(International IP Backbone) in 2008 Beijing Seattle KTIX o Alto Tokyo Hong Kong PAIX s Angeles Equinix

International Backbone Network KT IP Transit KT as Global Carrier KT has direct connections with 11 countries 25 major carriers in Asia region

International Backbone Network KT IP Transit KT as Global Carrier KT does triplicate US and Europe POPs along with multiple connections/cables, which are planned to build up additional Po. Ps.

KT IP Transit Service KT IP Transit KT as Global Carrier IP Service in Hong Kornet HK COLO Customer KT HK POP US Europe Customer Asia Service Interface to connect - Fast Ethernet: 10~100 Mbps - DS-3, STM-1, STM-4 - Gigabit Ethernet: 100~1000 Mbps

KT IP Transit Service KT IP Transit KT as Global Carrier AS connectivity Ranking KT ranks no. 1 AS connectivity among Asia carriers by the report from CAIDA. org

KT IP Transit Service KT IP Transit KT as Global Carrier Reliable Back up system Stable Network Efficient N/W Management Reliable Equipment Increased Network Efficiency Aggressive Marketing Strategy Maximized Customer Satisfaction Systematic Management Support System Competitive Pricing Centralized Management Differentiated Promotion One Stop Services

KT IP Transit Service KT IP Transit KT as Global Carrier Reliability and Quality Availability - 100% availability that covers the KT backbone Average Delay Time Intra Asia < 100 ms Asia-Europe < 400 ms Asia-US < 240 ms Europe-US < 160 ms Packet Loss Average packet delivery of 99. 5 percent or greater regionally within KT’s Networks

Contact Information Commercial Contact - Jun Seo Global Business Office Tel: +82 31 727 2844 E-mail: junseo@kt. co. kr Technical Contact - Sa-Hyuck YUN Network Group Tel: +82 31 727 2553 E-mail: sahyuck@kt. co. kr

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