1. The Value Networking Company 2006.3.30

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

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

4. Brief Introduction of KT As of Dec. 2004 General Overview

5. Business Domain General Overview

6. Domestic Affiliates General Overview

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

8. M/S : 95.1 % M/S : 33.0 % M/S : 50.9 % New Engine BB Internet PSTN Mobile Expectation in Revenue Growth General Overview

9. Growth of Broadband Business General Overview

10. III.KT IP Transit II. II.KT Global Network I.General Overview  KT Overseas PoPs  KT Global Network  GlobalPass

11. KT Overseas PoPs Overseas PoPs KT as Global Carrier KT Global Network PoP Location PoP Location - GlobalPass : HK, Tokyo, Singapore, LA, NY, London - GlobalPass : HK, Tokyo, Singapore, LA, NY, London - Internet : HK, LA, Palo Alto, Seattle, London, Amsterdam, Frankfurt - Internet : HK, LA, Palo Alto, Seattle, London, Amsterdam, Frankfurt GlobalPass Services GlobalPass Services - IPLC : Managed End-to-End IPLC Solution - IPLC : Managed End-to-End IPLC Solution - MPLS VPN : Managed End-to-End VPN Solution - MPLS VPN : Managed End-to-End VPN Solution

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

13. Global Network 2 KT as Global Carrier KT Global Network

14. Landing Cable Systems Landing Cable Systems - APCN, APCN-2, C2C, CKC, CUCN, EAC, FEA, FNAL/RNAL, SMW-3 - APCN, APCN-2, C2C, CKC, CUCN, EAC, FEA, FNAL/RNAL, SMW-3 Non-Landing Cable Systems Non-Landing Cable Systems - Americas-1, APC, Atlandtis-2, CanTAT-3, CanUS-1, CJC, CMC, CNC - Americas-1, APC, Atlandtis-2, CanTAT-3, CanUS-1, CJC, CMC, CNC Columbus-2, JUCN, M-T, NCC, NPC, Odin, PanAmerican, Rioja Columbus-2, JUCN, M-T, NCC, NPC, Odin, PanAmerican, Rioja SAT-3/WASC/SAFE, SCCN, SMW-2, TAT-10, TAT-12/13, TGN, TPC-5, T-V-H SAT-3/WASC/SAFE, SCCN, SMW-2, TAT-10, TAT-12/13, TGN, TPC-5, T-V-H Submarine Cable NetworkGlobal Satellite Network IntelSat Satellites IntelSat Satellites - Three over the Pacific Ocean, three over the Indian Ocean - Three over the Pacific Ocean, three over the Indian Ocean InmarSat Satellites InmarSat Satellites - One over the Pacific Ocean, 1(+1 expected) over the Indian Ocean - One over the Pacific Ocean, 1(+1 expected) over the Indian Ocean Other Satellites Other Satellites - 2 AsiaSat, 1 PanamSat, 1JcSat, 1 Telstar, 4NSS - 2 AsiaSat, 1 PanamSat, 1JcSat, 1 Telstar, 4NSS Services Services - PSTN, IPLC, Broadcasting, VSAT - PSTN, IPLC, Broadcasting, VSAT KT Global Network KT as Global Carrier KT Global Network

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

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

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

18. 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 Kornet Introduction Kornet KT as Global Carrier KT IP Transit KT IP Transit KT is the largest telecom company and ISP in Korea KT is the largest telecom company and ISP in Korea The number of subscribers for Kornet broadband service The number of subscribers for Kornet broadband service outnumbers 6.2 mil users among 12 mil Korea broadband outnumbers 6.2 mil users among 12 mil Korea broadband Internet market. Internet market. Subscribers

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

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

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

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

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

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

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

26. KT IP Transit Service KT as Global Carrier KT IP Transit KT IP Transit Reliability and Quality Availability Availability - 100% availability that covers the KT backbone - 100% availability that covers the KT backbone Average Delay Time Average Delay Time Packet Loss Packet Loss Average packet delivery of 99.5 percent or greater regionally within KT’s Networks Average packet delivery of 99.5 percent or greater regionally within KT’s Networks Intra Asia< 100ms Asia-Europe < 400ms Asia-US < 240ms Europe-US < 160ms

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

28. Thank You