A. The call control profile is checked for any rejection, then the map-service is checked for any form of routing definitions.

B. The call control profile is checked for any rejection, then the SGSN-Service is checked for any rejection.

C. The SGSN service is checked for any rejection, then the call control profile is checked for any rejection.

D. The map-service is checked for any form of routing definitions, then the call control profile is checked for any rejection.

A. 8

B. 7

C. 6

D. 9

A. A smurf attack is an attack in which small TCP packets are sent toward a server from thousands of subscribers, which causes the server network buffer to overflow and drop packets and results in a denial of service.

B. A smurf attack is an attack in which the attacker sends ICMP echo request packets using a spoofed source IP address destined to remote network broadcast addresses, which results in all recipients replying back to the spoofed source IP address in an attempt to cause a denial of service to the targeted spoofed IP address.

C. A smurf attack is an attack in which the attacker attempts to change the TCP MSS value to a small value for all TCP flows destined to the target device, which results in many small packets having to be processed by the target, which causes buffer overflows and denial of service.

D. A smurf attack is an attack in which the attacker sends UDP echo packets using a spoofed source IP address destined to remote network broadcast addresses, which results in all recipients replying back to the spoofed source IP address in an attempt to cause a denial of service to the targeted spoofed IP address.

A. Ports are not correctly configured.

B. No common AVP was found during capabilities exchange procedure.

C. The transport layer connection is not established.

D. Diameter does not support TCP as a transport protocol.

A. RAND failure

B. MAC failure

C. UMTS authentication unacceptable

D. GSM authentication unacceptable

E. SYNC failure

A. HLR

B. OCS

C. PCRF

D. AAA