TDC364-hw08

TDC364-hw08 1. In the case of SIP-based Toll Fraud attack, what is the SIP message used by the hackers to probe the SIP serer? a. PROBE b. MESSAGE c. SUBSCRIBE d. REGISTER 2. Which of the following SIP-based security attack has immediate financial gains for the hackers? a. Eavesdropping b. Toll Fraud c. Denial of Service d. Registration Hijacking 3. In the case of SIP-based DoS attacks, which of the SIP message is likely to be used by the hackers? a. PROBE b. MESSAGE c. INVITE d. SUBSCRIBE 4. What is the protocol to secure the signaling channel of VoIP? a. SIPS (RFC 3261) b. SRTP (RFC 3711) c. MIKEY (rfc 3830) d. IPSec 5. What is the protocol to secure the bearer channel of VoIP? a. SIPS (RFC 3261) b. SRTP (RFC 3711) c. MIKEY (rfc 3830) d. IPSec 6. In the case of toll fraud of International Premium Rate and Revenue Sharing (IPRS), which NANP country/region is the most likely place to be used by hackers? a. Dominica b. Somalia c. Canada d. Mexico