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Which symmetric encryption cryptosystems was developed to replace both DES and 3DES?

A. DES B. WEP C. RSA D. AES

When a VPN connection loses connectivity due to a network interruption, which protocol can reconnect automatically once network connectivity is restored using a feature known as VPN Reconnect?

A. PPTP B. L2TP C. SSTP D. IKEv2