Practice Free H12-831_V1.0-ENU Exam Online Questions
The AS-path attribute is a private attribute of the BGP protocol. The "if-match as-path-filter" command is only valid for BGP routes.
- A . True
- B . False
Both VLAN aggregation and MUX VLAN are deployed in a certain enterprise network, and the interfaces connecting the switches to the terminals are all Access interfaces.
in the scenario shown in the figure, which of the following IP addresses can PC3 access? (Multiple choice)
- A . 10.1.1.2
- B . 10.1.1.100
- C . 10.1.1.15
- D . 10.1.1.1
When creating an IPv6 static route, for a broadcast type interface, you need to specify the next hop, and the next hop address can be a link-local address. When the next hop address is a link-local address, you must specify the outbound interface.
- A . True
- B . False
In the OSPFv3 network shown in the figure, area 1 is a stub area, area 2 is a common area, and area 3 is an NSSA area. The IPv6 address of the R5 Lopback0 interface is 2000::5/128, which is introduced into OSPFv3 through import. The Router ID of each device is 10.0.X.X, where X is the device number.
Which of the following descriptions is correct?
- A . R1 generates an Inter-Area-Router-LSA in area 0
- B . R2 generates an Inter-Area-Router-LSA in area 0
- C . R3 generates an Inter-Area-Router-LSA in Area 3
- D . R3 generates an Inter-Area-Router-LSA in Area 0
On the IS-IS IPv6 network shown in the figure, multi-topology is enabled on all routers.
The IPv6 address of Loopback0 on R4 is 2000::4/128.
The command ipv6 summary 2000::/64 level-1-2 is configured in the IS-IS process of R4.
Which of the following statements is false?
- A . The routing table of R1 contains the route 2000::4/128.
- B . The routing table of R3 contains the route 2000::/64.
- C . The routing table of R2 contains the route 2000::/64.
- D . The routing table of R5 does not contain the route 2000::/64.
D
Explanation:
Comprehensive and Detailed In-Depth
Understanding the IS-IS Network and IPv6 Route Summary Behavior
IS-IS Areas and Router Roles:
Area 49.0001 (Level-1-2): R1, R2, R4
Area 49.0002 (Level-1-2 & Level-1): R3 (Level-1-2), R5 (Level-1 only)
Effect of ipv6 summary 2000::/64 level-1-2 Command on R4
Route summarization in IS-IS allows an L1-L2 router (R4) to aggregate IPv6 prefixes and advertise a
summary route (2000::/64) into both Level-1 and Level-2 areas.
This means R4 will advertise only 2000::/64 instead of specific /128 routes (like 2000::4/128).
All Level-1 and Level-2 routers connected to R4 will receive the summary route 2000::/64 instead of
the detailed /128 routes.
Route Distribution Analysis for Each Statement
In the network shown in the figure, OSPF protocol is deployed between R2 and R1, and OSPF protocol is also enabled on GE0/0/1 interface of R2. IS-IS protocol is deployed between R2 and R3. In order for R1 to obtain the route to 10.0.3.3/32, IS-IS route is introduced into OSPF route on R2. Then, in the routing table of R1, the next hop address to 10.0.3.3/32 is ().
MPLS determines the upstream and downstream relationship based on the data forwarding direction. The MPLS label message is sent from the upstream LSR and received and processed by the downstream LSR. Similarly, the release of MPLS labels is also distributed one by one from upstream to downstream.
- A . True
- B . False
NetEngine AR can assign DHCP addresses to clients in the same network segment or different network segments from the router as a DHCP server.
Which of the following reasons will not cause the client to be unable to obtain the correct address?
- A . The DHCP function is not enabled on the device
- B . The link between the client and the server is faulty
- C . IP address lease period is less than 24 hours
- D . There are no available IP addresses in the address pool to allocate.
When executing a cutover project, network engineers can perform remote operations at the customer’s network maintenance center and guide on-site construction personnel to complete hardware-related operations, such as powering on equipment and connecting equipment.
- A . True
- B . False
A network device has established an OSPF neighbor relationship. The configuration of its GE0/0/0 interface is shown in the figure.
Which of the following commands executed on this interface will not affect the OSPF neighbor status of this interface? (Multiple choice)
- A . undo ospf dr-priority
- B . undo description
- C . undo ospf Cost
- D . undo ip address 10.0.12.2 24