On the transmission line side Transmission line stabilization employing optical transmission and multiplexing equipment Enhanced security due to dedicated Internet private line and router security function utilization On the Internet backbone network side Korea's largest overseas backbone network capacity and largest interoperable domestic network. Largest Korean provider for overseas POP (KORNET overseas operation points) services Full duplex, high-speed backbone network between major domestic cities and centers - on service and   customer support side Provides real-time traffic monitoring service for dedicated private lines Provides network diagnosis and security consulting service Operation of 24-hour help desk On the Internet access speed side KORNET network access speedup via employment of 'root DNS' and 'general Top Level Domain (gTLD)   name server' functions On the security side Harmful domestic and overseas traffic detection/analysis and interception system 24-hour security control center analyzes harmful intrusions around the world

Lease line type and fee Line speed Regular Fee Discount Fee PC center fee 56/64Kbps 796,000 477,600 310,200 128Kbps 1,080,000 648,000 421,200 256Kbps 1,462,000 877,200 570,200 512Kbps 2,023,000 1,213,800 789,000 1,024Kbps 2,325,000 1,395,000 1,014,000 1,544Kbps 3,636,000 2,181,600 1,417,800 2,048Kbps 4,698,000 2,818,800 1,831,800 15Mbps 12,641,000 7,584,600 - 45Mbps 19,500,000 15,600,000 - 155Mbps 36,000,000 28,800,000 - 622Mbps 78,750,000 63,000,000 - 1Gbps 103,500,000 82,800,000 - 2.5Gbps 211,500,000 169,200,000 - * PC center subscription rates apply to: Internet PC center, Karaoke entertainment center, On-line stock &   securities service centers, and educational institutions. * Venture enterprises/CP (contents provider) operator: Recognized by the Small and Medium Business   Administration Discount rates (eligible organizations) Eligibility Relocation (outside premises) o Small and medium business o Research centers o Computer and information processing institutes o Newspaper and broadcasting stations o National government agencies o Local government agencies o State-run enterprises, reinvestment organizations o Non-profit organizations promoting information and   communication technology o All organizations that find it essential 40% Hotline under 45M lines 20% Hotline over 45M lines Discount rates Discounts over the contract period Service type 1st year 2st year 3st year 5st year Hotline 10 % 15 % - 20 % Installation fee (Unit price: won/VAT excluded) Service type Fee New subscription Relocation (within premises) Relocation (outside premises) KORNET Hotline 54/64Kbps 128Kbps~2.048Mbps over 2Mbps 28,000 28,000 15,000 100,000 100,000 50,000 970,000 970,000 - Equipment lease charges Service type Equipment lease charges Fee Hotline 56/64Kbps 128K~2,048Kbps Dornestic/Overseas DSU 4,000 FDSU,HSM,CSU 8,000 Router 40,000 / 80,000