India's first integrated defense communication network was dedicated to the country. Which fact is true in this regard?

• A. With the help of this, Army, Air Force, Navy and Special Forces Command will share information as per the situation for speedy decision making process.
• B. Strategic and highly secure Defense Communication Network (DCN) has reach across India from Ladakh to Northeast and island regions.
• C. The network covers 111 establishments spread across the country and provides high quality voice, video, data services.
• D. All of the above