[2023年05月]更新のH12-831-ENU認定実際の問題を提供します [Q114-Q135]

[2023年05月]更新のH12-831-ENU認定実際の問題を提供します

更新されたのはH12-831-ENU問題集PDFでH12-831-ENUリアル有効なブレーン問題集には420問があります！

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質問 # 114
Which of the following statements about IS-IS (IPv4 6) is correct? (Multiple choice)

A. IS-IS works at the data link layer and only needs to add a new TLV to support IPv6
B. By default, IS-IS enables the multi-topology feature
C. Added TLV232236 to support IPv6 routing processing and calculation of IS-IS
D. In order to support the processing and calculation of IPv6 routes, IS-IS adds NLPID to 129 TLV

正解：A、C、D

質問 # 115
Sort by the cutover execution steps.

A. Install new equipment and configure
B. After ensuring that the business of the new equipment runs normally, the old equipment goes offline
C. After the cutover is completed, observe the status of the network on the new device
D. Perform service checks on new equipment
E. Cut over business from old equipment to new equipment

正解：A、B、C、D、E

質問 # 116
IS-IS is a link-state routing protocol that uses the SPF algorithm for route calculation. A campus deploys both IPv4 and IPv6 and runs IS-IS to achieve network interconnection.
As shown in the figure, the IPV4 and IPv6 costs of this network are the same, and R1 and R4 only support IPV4. By default, in the IPv6 shortest path tree formed by calculation, the next hop device for R2 to access R6 is: ( ). (Note: the device name must be the same as the figure, such as: R1)

A. R3

正解：A

質問 # 117
Which of the following is a description of the process of establishing an LSP using the downstream autonomous label publishing method and the ordered label control method? (Multiple choice)

A. If the outgoing node has a label available for allocation, it will allocate a label to the FEC and actively send a label mapping message to the upstream.
B. When the node LSR receives the label mapping message, it also needs to add the corresponding entry in the label forwarding table
C. The edge node finds that a new destination address that does not belong to any existing FEC appears in its routing table, and will not create a new FEC corresponding to it.
D. The LSP establishment process actually binds the FEC and the label, and advertises the binding to the neighboring LSRs on the LSP

正解：A、B、D

質問 # 118
Regarding the description of the encapsulation format of labels in MPLS, which of the following is correct? (Multiple choice)

A. S field in the label is 1bit
B. The TTL field in the label and the TTL (Time To Live) in the IP packet.
C. For the packets of Ethernet and PPP, the label stack is located between the Layer 2 header and the data like the 'cushion layer': when there is a VLAN tag, the MPLS header is placed between the Ethernet header and the VLAN tag
D. The total length of a single MPLS label is 4 bytes (32bits)

正解：B、D

質問 # 119
As shown in the figure, Client1 and Client2 serve as clients of RR1 and RR2 at the same time, RR1 and RR2 are in the same Cluster, and R1 imports 10 routes. Assuming that the BGP configuration is correct and all neighbor relationships have been established, how many routing entries will Client 2 receive in the end?

A. 0
B. 1
C. 2
D. 3

正解：B

質問 # 120
All routers run OSPF as shown.

Which of the following statements is correct?

A. R2 only generates Router LSA in area 0
B. R2 generates Router LSAs in both area 1 and area 0
C. R2 forwards the Router LSA generated by R3 to R1
D. R2 forwards the Router LSA generated by R1 to R3

正解：B

質問 # 121
An enterprise purchased private lines from two operators. In order to optimize the lines, the enterprise used BGP to learn routing entries from the two operators. However, the enterprise found that the traffic of the egress route increased greatly after this configuration. After the network engineering investigation, it was found that the traffic of the two operators was passed to each other through the enterprise egress router.
Therefore, the enterprise intends to use the routing strategy so that the traffic of the packets of different carriers is no longer passed to each other. Is the configuration in the following figure correct?

A. FALSE
B. TRUE

正解：B

質問 # 122
According to the configuration shown in the figure below, you can know that R4 has an interface advertised into IS-IS?

A. 0
B. 1
C. 2
D. 3

正解：C

質問 # 123
If the goods counted are inconsistent with the quantity on the packing list, you can unpack and inspect the goods before contacting the manufacturer for processing.

A. FALSE
B. TRUE

正解：A

質問 # 124
By viewing DHCP configuration information and packet statistics, you can view the running status of the device and the count of DHCP packets received and sent, so as to locate problems during routine maintenance. Which of the following commands can be used to view DHCP messages directly? (Multiple choice)

A. display dhcp
B. display dhcp relay staitstics
C. display dhcp statistics
D. display dhcp server statistics

正解：B、C、D

質問 # 125
If you want to check the files under Flash, which command should you use?

A. dir sdl
B. dir sd0
C. display patch-information
D. dir flash

正解：D

質問 # 126
Which of the following is not a preliminary preparation for the cutover plan?

A. Existing network root description
B. Cutover target
C. Risk Assessment
D. Field Defence

正解：D

質問 # 127
The network administrator A wants to use the IP Prefix List to match a specific route entry. Which of the following routes will be matched by the IP Prefix List in the figure? (Multiple choice)

A. 10.0.0.1/30
B. 10.0.1.0/24
C. 10.0.2.0/24
D. 10.0.0.0/24

正解：A、D

質問 # 128
In MPLS network, there are different operation types for labels, among which the meaning of "pop" action is?

A. Replace the top label with another set of labels
B. Replace the top label with another value
C. Add the top label to the MPLS label stack
D. Remove the top label in the MPLS label stack

正解：D

質問 # 129
BGP4+ carries the next hop address of the IPv6 route through the Next_Hop attribute in the Update packet.

A. FALSE
B. TRUE

正解：A

質問 # 130
LDP neighbor discovery has different implementation mechanisms and regulations. Which of the following description of LDP neighbor discovery is wrong?

A. LDP discovery mechanism includes LDP basic discovery mechanism and LDP extended discovery mechanism
B. LDP basic discovery mechanism can automatically discover LDP peers directly connected to the same link
C. The LDP discovery mechanism needs to clearly specify the LDP Peer.
D. LDP Extended Discovery Mechanism Can Discover Non-Directly Connected LDP Peers

正解：C

質問 # 131
What are the advantages of PQ+WFQ? (Multiple choice)

A. Messages with different priorities cannot be treated differently
B. Realize the needs of flexible classification of packets according to user definition
C. It can ensure the timely scheduling of low-latency services
D. Implement bandwidth allocation by weight

正解：C、D

質問 # 132
Which statement is true about ASPF and Server-map? (Multiple choice)

A. After the channel is established, the message is still forwarded according to the Server-map
B. The server-map entry will be deleted after a certain aging time because there is no packet matching. This mechanism ensures that the looser channel such as the Server-map entry can be deleted in time, which ensures the security of the network. When a new data connection is subsequently initiated, the establishment of the Server-map entry will be re-triggered
C. Server-map is usually only used to check the first message, and the message after the channel is established is still forwarded according to the session table
D. Only ASPF will generate the Sever-map table

正解：B、C

質問 # 133
In addition to the virtual connection, what type of IPv6 address is the source IPv6 address of the Hello packet of OSPFv3?

A. IPv6 anycast address
B. Global Unicast Address
C. Link-local address
D. Unique local address

正解：C

質問 # 134
As shown in the figure, the APLS LSP is configured in the network and the goal is to establish an LDP session between SWA and SWB, then which of the following statement is correct?