Implementing Cisco Service Provider Mobility UMTS Networks (SPUMTS) v1.0
Question 1
Which option describes how the Diameter relay agent routes messages to Diameter servers?
- A. based on IP address
- B. based on destination realm
- C. based on application used (Gx, Gy)
- D. based on source realm
Answer : B
Question 2
In which two circumstances is Diameter Peer Discovery needed? (Choose two.)
- A. The Diameter client is rejected by the peer.
- B. The Diameter client must contact a first-hop Diameter agent.
- C. The Diameter agent must reply to the connect request of a Diameter client.
- D. The Diameter agent must search the next agent so that Diameter messages can reach the Diameter server.
- E. The Diameter agent must close the session with a Diameter client.
Answer : BD
Question 3
Refer to the exhibit.
The locally configured Diameter peer does not seem to be communicating with its remote peer. Which option describes the problem?
- 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.
Answer : C
Question 4
An airport is providing free one-hour mobile Internet service for passengers. At the end of the free one-hour service, the PCRF sends a Diameter command to the mobile packet core to stop the free service. Which Diameter command is sent by the PCRF?
- A. CCR-U
- B. RAR
- C. CCR-T
- D. STA
- E. RAA
Answer : B
Question 5
In which two ways is GRE used in GGSN? (Choose two.)
- A. to transport the subscriber traffic between MS and GGSN
- B. to transport AAA packets between GGSN and the service provider RADIUS server
- C. to transport AAA packets between GGSN and the corporate RADIUS server
- D. to transport the enterprise subscriber packets to the corporate gateway
- E. to transport the enterprise subscriber packets to the Internet
Answer : CD
Question 6
Which IP protocol number is used by GRE?
- A. 41
- B. 47
- C. 14
- D. 51
- E. 57
Answer : B
Question 7
Which option provides a secure connection between two endpoints as it encapsulates the IP payload?
- A. transport mode IPsec
- B. GRE
- C. Internet Key Exchange security association
- D. L2TP
Answer : A
Question 8
Which MPLS/BGP functionality can the Cisco ASR 5000 GGSN run in a service provider network?
- A. provider edge router
- B. customer edge router
- C. autonomous system border router
- D. provider edge and customer edge
- E. provider router
Answer : B
Question 9
Which three applications use IPsec? (Choose three.)
- A. PDN access
- B. MAP
- C. GTPv2
- D. Mobile IP
- E. L2TP "" between GGSN acting as LAC and LNS
- F. L2TP "" between LAC and LNS on same node
- G. Diameter
Answer : ADE
Question 10
Which option describes the advantage of using L2TP over IPsec versus IPsec only?
- A. L2TP improves performance.
- B. The overhead that is introduced is lower.
- C. L2TP can transport protocols other than IP.
- D. L2TP provides Layer 2 VPN functionality.
Answer : C
Question 11
Which option describes how IPsec is used for L2TP configuration on GGSN?
- A. IPsec encapsulated data is sent over the L2TP tunnel.
- B. L2TP encapsulated data is sent over the IPsec tunnel.
- C. L2TP references IPsec for forwarding decisions.
- D. IPsec encapsulated data is sent between MS and GGSN, and data between LAC (GGSN) and LNS is sent via L2TP tunnel.
Answer : B
Question 12
According to 3GPP standards, which option is the interface between the Charging Data Function and the Charging Gateway Function?
- A. Gz
- B. Gc
- C. AAA
- D. Rf
- E. Ga
Answer : E
Question 13
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
Answer : D
Question 14
Refer to the exhibit.
Which three Diameter AVPs are sent within the CCR-I request to the OCS? (Choose three.)
- A. Session-ID
- B. Used-Service-Unit
- C. Request-Service-Unit
- D. 3GPP-Quota-Consumption-Time
- E. Subscription-ID
- F. Event-Trigger
Answer : ACE
Question 15
When the failure handling mode is configured as Terminate, which behavior is expected on the GGSN when the OCS sends the diameter result code=4012 within the MSCC in CCA-U message?
- A. The GGSN retries sending the CCR-U to the secondary OCS if available, and then terminates the PDP.
- B. The GGSN terminates the PDP.
- C. The GGSN allows the PDP to continue as an offline session, which disables the Gy interface.
- D. The GGSN blacklists the rating group listed within the MSCC AVP.
Answer : D