4A0-104 Online Practice Questions and Answers

Click the exhibit. This output is from router R4. Service 333 is a VPLS. Why might the peer 10.10.10.1 have the same value for IngLbl and EgrLbl?

A. The labels are of local significance only, so other routers can use the same value.

B. 10.10.10.1 has yet to send its own unique label.

C. Router R4 is using the same tunnel to send and receive to 10.10.10.1.

D. The service on 10.10.10.1 is down, so it is rejecting packets.

What happens by default on a Nokia 7750 SR when a null encapsulated SAP receives a frame with a VLAN tag?

A. The original VLAN tag is removed.

B. The original VLAN tag is kept.

C. The VLAN tag is replaced by a provider tag.

D. The VLAN tag is kept and a provider tag is added.

Which of the following about the lsp-ping command on the Nokia 7750 SR is FALSE?

A. An echo request is sent based on the LSP's label stack.

B. Echo reply packets may not take the same path as the LSP.

C. The IP destination address is used to initiate echo requests.

D. The test fails if the LSP is not operationally up.

Which of the following about the components of a service on the Nokia 7750 SR is FALSE?

A. An SDP can be used by more than one service and customer.

B. A SAP can only be created on an access port.

C. A customer can have multiple services associated to it.

D. A customer is only created on one site of a distributed service.

Click the exhibit.

R1 and R4 are providing a VPRN for the CEs. Which of the following about the traceroute run on router R5 is TRUE?

A. The traceroute will only show one hop: R5-R6.

B. The traceroute will only show 2 hops; R5-R1 and R4-R6.

C. The traceroute will only show 3 hops: R5-R1, R1-R4 and R4-R6.

D. The traceroute will show one hop for each router in the provider core and one for each CE-PE hop.

What happens when a packet without a VLAN tag is received on a SAP provisioned with null encapsulation while an SDP vc-type is provisioned as vlan?

A. The frame is dropped.

B. The service ID is added as the VLAN tag.

C. A VLAN tag of 0 is added as the provider VLAN tag

D. The frame is forwarded with no VLAN tag

Which of the following statements best describes the flooding of traffic on a PE when traffic is received on a SAP?

A. Traffic is flooded to all SAPs in the service.

B. Traffic is flooded to all SAPs and spoke SDPs in the service.

C. Traffic is flooded to all SAPs and mesh SDPs in the service.

D. Traffic is flooded to all SAPs, spoke SDPs, and mesh SDPs in the service.

E. The traffic is not flooded.

What are the two major differences between configuring an IES service and configuring VPWS or VPLS services? (Choose two.)

A. IES does not support QoS.

B. IES has a configurable IP-MTU

C. A virtual route table must be configured for an IES service.

D. An IES interface has an IP address assigned to it.

Click on the exhibit button below.

Is a routing policy required on PE1 to advertise a CE1's system interface to PE2?

A. Yes. A routing policy is required to advertise routes between PE routers in a VPRN

B. No. A routing policy is not required; the default behavior on the Nokia 7750 SR is to advertise all VPRN routes between PE routers.

C. A routing policy is required only when BGP is used as the PE-CE routing protocol, as shown in the exhibit.

D. A CE1 system interface can not be advertised to PE2 since the CE routers are not aware of the VPRN.

Which of the following conditions are necessary in order for service labels to be signaled between two PE routers? (Choose three.)

A. LDP must be enabled on both PE routers.

B. RSVP must be enabled on both PE routers.

C. Traffic engineering must be enabled in the IGP.

D. The VC-ID must match between the two PE routers in both directions.

E. The transport tunnel must be operationally up between the two PE routers in both directions.

F. The SDP ID must match between the two PE routers in both directions.