Which option describes how DNS snooping is used on the Cisco ASR 5000?

A. DNS snooping allows the Cisco ASR 5000 to snoop DNS query packets and compare against known DNS responses. If a match is found, the Cisco ASR 5000 replies to the query itself instead of forwarding the query to the destination DNS server.

B. DNS snooping allows the Cisco ASR 5000 to detect if a DNS response sent back to a subscriber is valid. If the response is invalid, the Cisco ASR 5000 drops the packet.

C. DNS snooping allows the Cisco ASR 5000 to enable set of dynamic IP rules to be installed based on the response to DNS queries sent by a subscriber that matches a configured domain rule definition. Dynamic IP rules are created for these IP entries within the same rule that has the domain name, which applies the same charging action to these dynamic rules.

D. DNS snooping allows the Cisco ASR 5000 to enable set of dynamic domain rules to be installed based on the response to DNS queries sent by a subscriber that matches a configured domain rule definition. Dynamic domain rules are created for the DNS responses within the same rule that has the domain name, which applies the same charging action to these dynamic rules.

Which option describes the message that establishes the direct tunnel between RNC and GGSN?

A. SGSN context request/response and modify PDP context request/response

B. SGSN: Initiated update PDP context request/response and RAB assignment request/response

C. GGSN: Initiated update PDP context request/response and RAB assignment request/response

D. SGSN: Initiated update PDP context request/response and modify PDP context request/response

During the network-initiated PDP activation procedure, which network entity provides the GGSN the address of the SGSN, which the subscriber is attached to?

A. AAA

B. OCS

C. PCRF

D. HLR

What layer of the OSI model does the BSSAP+ protocol map to?

A. Data link layer

B. Network layer

C. Transport layer D. Application layer

In which three scenarios is a Create Session Request sent to the SGW? (Choose three.)

A. Gn/Gp SGSN to S4 SGSN routing area update

B. Gn/Gp SGSN to MME tracking area update procedure

C. UE requested PDN connectivity

D. UE triggered service request

E. ready to STANDBY transition within the network

F. network triggered service request procedure