[2023年12月]更新の4A0-115ブレーン問題集で4A0-115問題で最高得点を目指すため今すぐ試そう
4A0-115試験問題集でベスト問題集を無料で試そう4A0-115試験問題
Nokia 4A0-115 認定試験の出題範囲：
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質問 # 16
Which of the following EVPN routes are exchanged to support the operation of a multi-homed EVPN VPWS?
- A. MAC/IP routes, A-D per EVI routes, and A-D per ES routes
- B. A-D per EVI routes and ES routes only
- C. A-D per EVI routes, A-D per ES routes, and Ethernet segment (ES) routes
- D. Auto-discovery per EVPN instance (A-D per EVI) routes and Auto-discovery per Ethernet segment (A-D per ES) routes only
正解：C
解説：
Explanation
A-D per EVI routes, A-D per ES routes, and Ethernet segment (ES) routes are exchanged to support the operation of a multi-homed EVPN VPWS. These routes are used to discover all PEs associated with an Ethernet segment, indicate the redundancy mode of the Ethernet segment, and elect the designated forwarder for each service.
質問 # 17
Examine the exhibit.
Which of the following statements about the EVPN routes exchanged for EVPN VPWS 2 is TRUE?
- A. PEI advertises an A-D per EVI route that includes a non-zero Layer-2 MTLJ.
- B. All PES advertise a MAC route that includes a non-zero MPLS label.
- C. PE2 advertises an A-D per EVI route that includes a P flag set to I.
- D. PEI advertises an A-D per EVI route that includes a tag ID set to 40.
正解：B
解説：
Explanation
All PEs do not advertise a MAC route that includes a non-zero MPLS label. Only PE1 advertises a MAC route that includes a non-zero MPLS label, which is used by PE2 to forward traffic to PE1. PE2 and PE3 do not advertise any MAC routes for VPWS 21.
Verified References: Ethernet Virtual Private Networks (EVPNs)
質問 # 18
In the exhibit, the EVPN-IRB is using the interface-ful unnumbered model and is fully operational. Which of the following statements isFALSE?
- A. An MP-BGP session that supports the advertisement of EVPN routes is established between PEI and PE2.
- B. On PE3, the routing table for VPRN 15 contains an entry for 10.10.1.0/24. This entry is resolved to MAC-OI as an overlay index.
- C. An MP-BGP session that supports the advertisement of VPN-IPv4 routes is established between PE3 and PE4.
- D. On PE3, the routing table for VPRN 15 contains an entry for 10.10.4.0/24. This entry is resolved using a transport tunnel towards PEA.
正解：B
解説：
Explanation
On PE3, the routing table for VPRN 15 does not contain an entry for 10.10.1.0/24. This entry is not needed because Host 1 is in the same subnet as the SBD IRB interface on PE3, and PE3 can reach Host 1 using its MAC address2.
Verified References: Nokia Ethernet Virtual Private Network Services Course | Nokia
質問 # 19
What are EVPN inclusive multicast Ethernet tag (IMET) routes used for?
- A. To advertise the redundancy mode of a local Ethernet segment
- B. To discover all PES participating in the same VPIS service
- C. To advertise the MAC or MAC/IP addresses of locally-learned hosts
- D. To discover all PES attached to the same Ethernet segment
正解：B
解説：
Explanation
EVPN inclusive multicast Ethernet tag (IMET) routes are used to discover all PEs participating in the same VPIS service. These routes are also used to build the flooding list for BUM traffic.
質問 # 20
Examine the exhibit.
Which of the following configuration conditions is required for the proper operation of EVPN VPWS 2?
- A. The local AC tag ID configured on PEI must match the local AC tag ID configured on PE3.
- B. The remote AC tag ID configured on PE2 must match the remote AC tag ID configured on PE3.
- C. The local AC tag ID and the remote AC tag ID configured on PE2 must match.
- D. The local AC tag ID configured on PE2 must match the local AC tag ID configured on PEI.
正解：D
解説：
Explanation
The local AC tag ID configured on PE2 must match the local AC tag ID configured on PE1. This ensures that the tag IDs are consistent across both ends of the VPWS service. The remote AC tag ID configured on PE2 does not need to match the remote AC tag ID configured on PE3, as long as they are unique within each PE1.
Verified References: Ethernet Virtual Private Networks (EVPNs)
質問 # 21
Which of the following statements about the EVPN Layer 2 Attributes extended community is FALSE?
- A. It specifies the service maximum transmission unit (MTU).
- B. It is advertised with the auto-discovery per EVPN instance (A-D per EVI) route.
- C. It is applicable to EVPN VPLS services.
- D. It specifies a P flag that indicates whether the advertising PE is a primary PE.
正解：C
解説：
Explanation
The EVPN Layer 2 Attributes extended community is not applicable to EVPN VPLS services. It is applicable to EVPN VPWS services, where it carries information such as the tag ID and the service MTU1.
Verified References: Ethernet Virtual Private Networks (EVPNs)
質問 # 22
Based upon the exhibit,
which of the following statements about the forwarding of BUM traffic is FALSE?
- A. PE2 decapsulates the packets received from PE3 and forwards the frames to CE2.
- B. PE3 replicates the traffic and sends it to all PES in its VPLS I flooding list.
- C. PE3 adds an ESI label to packets forwarded to PEI because PEI is connected to the same Ethernet segment.
- D. PEI forwards the traffic received from PE3 to CEI, and CEI discards it based upon the ESI label.
正解：C
解説：
Explanation
PE3 does not add an ESI label to packets forwarded to PE1 because PE1 is connected to the same Ethernet segment. PE3 adds an ESI label only to packets forwarded to PEs that are not connected to the same Ethernet segment, such as PE21.
Verified References: Ethernet Virtual Private Networks (EVPNs)
質問 # 23
In the exhibit,
MACI moves from PEI to PE2. Which of the following actions related to this MAC address mobility is performed?
- A. PE3 waits to receive a data packet from CEI to update its FDB entry for MACI.
- B. PE2 advertises a MAC/IP route for MACI with a sequence number higher than that received from PEI.
- 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.
正解：B
解説：
Explanation
PE2 advertises a MAC/IP route for MAC1 with a sequence number higher than that received from PE1. This indicates that MAC1 has moved from PE1 to PE2 and triggers a MAC withdrawal message from PE1 to remote PEs. CE1 does not generate an update message to PE1 withdrawing its MAC, nor does PE1 generate an update message to remote PEs identifying the new location of CE11.
Verified References: Ethernet Virtual Private Networks (EVPNs)
質問 # 24
A Layer-3 EVPN service is configured to use the interface-ful unnumbered forwarding model. Which of the following statements isFALSE?
- A. Each participating PE advertises a MAC/IP route that carries the MAC address of SBD IRB interface.
- B. The VPRN service is configured to allow the advertisement of IP prefixes.
- C. IP-Prefix routes exchanged between PES include a non-zero MAC address as an overlay index.
- D. The SBD IRB interface configured in the VPRN service has no IP address assigned to it.
正解：D
解説：
Explanation
The SBD IRB interface configured in the VPRN service has an IP address assigned to it. The IP address is used as a gateway IP address for hosts in the corresponding subnet2.
Verified References: Nokia Ethernet Virtual Private Network Services Course | Nokia
質問 # 25
In the exhibit,
VPLS 20 is associated with a single-active Ethernet segment on routers PEI and PE3. Which of the following statementsis FALSE?
- A. PEI advertises an A-D per EVI route which includes a P flag set to I to indicate that PEI is the DF for EVI 20.
- B. When PEI learns MAC-01, it advertises a MAC/IP route which indicates that MAC-OI is associated with ESI I.
- C. PE3 advertises an A-D per ES route which indicates that ESI I is operating in a single-active redundancy mode.
- D. PEI advertises an A-D per ES route which indicates that ESI 1 is operating in a single-active redundancy mode.
正解：B
解説：
Explanation
When PE1 learns MAC-01, it advertises a MAC/IP route which indicates that MAC-01 is associated with ESI
1. This route is used by remote PEs to populate their FDBs with MAC-01 and its corresponding ESI.
質問 # 26
Examine the exhibit.
Which of the following actions is performed by PEI after it receives a BUM packet from CEI?
- A. PEI does not flood the packet because PEI is acting as non-designated forwarder (non-DF) for VPLS 10.
- B. PEI sends the packet to PE2 and to PE3. An ESI label is included only in the packet sent to PE3.
- C. PEI sends the packet to PE2 but not to PE3 because PE3 is connected to the originating ES.
- D. PEI sends the packet to PE2 and to PE3. An ESI label is included only in the packet sent to PE2.
正解：D
解説：
Explanation
PE1 sends the packet to PE2 and to PE3. An ESI label is included only in the packet sent to PE2. The ESI label is used to implement the split-horizon mechanism and prevent traffic duplication. The packet sent to PE3 does not need an ESI label because PE3 is connected to the same Ethernet segment as PE1.
質問 # 27
In the exhibit, VPWS 4 enables communications between CEI and CE2. Which of the following statements regarding the operation of VPWS 4 is FALSE?
- A. PE3 advertises an IMET route to PEI as soon as VPWS 4 is administratively enabled.
- B. PEI and PE3 exchange their service labels using A-D per EVI routes.
- C. PEI advertises an auto-discovery per EVPN instance (A-D per EVI) route to PE3 as soon as the SAP becomes operationally
- D. PE3 and PE4 exchange their service labels over an established targeted LDP session.
正解：B
解説：
Explanation
PE1 and PE3 do not exchange their service labels using A-D per EVI routes. PE1 and PE3 exchange their service labels using MAC routes, which are advertised when their local ACs become operationally UP1.
Verified References: Ethernet Virtual Private Networks (EVPNs)
質問 # 28
Which of the following statements about the EVPN data plane is FALSE?
- A. EVPN allows a service provider to deliver multiple services over a single core network.
- B. EVPN-MPLS encapsulated data has a label that uniquely identifies each service.
- C. The customer data is encapsulated and then tunneled between the PE routers.
- D. EVPN-MPLS provides services over a simple IP network.
正解：D
解説：
Explanation
EVPN-MPLS provides services over an MPLS network, not a simple IP network. The customer data is encapsulated with an MPLS label that identifies the service and then tunneled between the PE routers using MPLS LSPs1.
Verified References: Ethernet Virtual Private Networks (EVPNs)
質問 # 29
Which of the following statements about the operation of a single-homed EVPN VPWS is TRUE?
- A. Each PE advertises a MAC route and an A-D per EVI route when its local AC becomes operationally UP.
- B. The advertised A-D per EVI route includes a non-zero tag ID and a non-zero MPLS label.
- C. Each PE verifies that the received tag ID matches its configured local AC tag ID.
- D. The same tag ID must be configured for the local attachment circuit (AC) at each PE.
正解：B
解説：
Explanation
The advertised A-D per EVI route includes a non-zero tag ID and a zero MPLS label. The tag ID is used to identify the VPWS service, while the MPLS label is not used for single-homed VPWS services1.
Verified References: Ethernet Virtual Private Networks (EVPNs)
質問 # 30
The interface-ful numbered model is used for a Layer-3 EVPN service. Which of the following statements is FALSE?
- A. EVPN MAC/IP routes are used to advertise the MAC and IP addresses of local hosts.
- B. EVPN routes are advertised with a service label associated with the SBD VPLS.
- C. IP-Prefix routes exchanged between PES include a non-zero gateway IP address as an overlay index.
- D. EVPN MAC/IP routes are used to advertise the MAC and IP addresses of SBD IRB interfaces.
正解：D
解説：
Explanation
EVPN MAC/IP routes are not used to advertise the MAC and IP addresses of SBD IRB interfaces. EVPN MAC/IP routes are used to advertise the MAC and IP addresses of local hosts attached to the SBD VPLS2.
Verified References: Nokia Ethernet Virtual Private Network Services Course | Nokia
質問 # 31
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最新版を今すぐ試そう4A0-115認定有効な試験問題集：https://drive.google.com/open?id=1FYa4hEp3rk477xYE6AvUwb_YKA8pCXb7