4A0-115 試験問題を無料オンラインアクセス

Which of the following best describes the operation of a non-designated forwarder (non-DF) in a single-active Ethernet segment?

• A.Allows Tx unicast, blocks Rx unicast, allows Tx BUM, blocks Rx BUM
• B.Allows Tx unicast, allows Rx unicast, blocks Tx BUM, allows Rx BUM
• C.Blocks Tx unicast, allows Rx unicast, blocks Tx BUM, allows Rx BUM
• D.Blocks Tx unicast, blocks Rx unicast, blocks Tx BUM, blocks Rx BUM

In the exhibit, the interface-ful numbered model is used for the Layer-3 EVPN service. Which of the following is used as the source MAC address in the packets sent from PEI when forwarding customer traffic to Host 2?

• A.MAC-03
• B.MAC-04
• C.MAC-OI
• D.MAC-11

Which of the following statements does NOT describe the operation of the Layer-3 EVPN asymmetric forwarding model?

• A.EVPN IP-Prefix routes are used to populate the VPRN VRF tables.
• B.All VPLS instances must be configured on all PES regardless of whether they have a local host or not.
• C.The egress PE does not perform any Layer-3 route look up to forward traffic.
• D.The ingress PE performs both Layer-2 and Layer-3 look ups when forwarding traffic between subnets.

In the exhibit,

MACI moves from PEI to PE2. Which of the following actions related to this MAC address mobility is performed?

• A.PE2 advertises a MAC/IP route for MACI with a sequence number higher than that received from PEI.
• B.PE3 waits to receive a data packet from CEI to update its FDB entry for MACI.
• C.PEI generates an update message to remote PES identifying the new location of CEI.
• D.CEI generates an update message to PEI withdrawing its MAC.

Examine the exhibit.

Which of the following configuration is NOT required to enable Layer-2 communication between CEI and CE2?

• A.Configure a local attachment circuit (AC) and a remote AC for VPWS 4 on all PE routers.
• B.Configure an MP-BGP session that allows the exchange of IPv4 labeled routes between PE3 and PE4.
• C.Configure an MP-BGP session that allows the exchange of EVPN routes between PEI and PE3.
• D.Configure a service distribution point (SDP) on PE3 to reach PE4, and another SDP on PE4 to reach PE3.