Practice Free H12-831_V1.0-ENU Exam Online Questions
In the OSPF network shown in the figure, the area numbers are marked in the figure, where area 1 is an NSSA area, and areas 2 and 3 are common areas. The "default-route-advertise always" command is configured in the SPF process of R5.
Which of the following routers have default routes in their routing tables? (Multiple choice)
- A . R6
- B . R2
- C . R4
- D . R3
When an IP packet enters the MPLS domain, the ingress node checks the Tunnel ID corresponding to the destination IP address.
When the Tunnel ID is one of the following, the ingress node performs IP forwarding on the packet?
- A . 0x2
- B . 0x0
- C . 0x1
- D . 0x3
Which of the following commands can be configured on an IS-IS Level-1-2 device to prevent the Level-1 device from generating a default route?
- A . attached-bit advertise never
- B . attached-bit advertise always
- C . import-route isis level-2 into level-1
- D . attached-bit avoid-learning
In the network shown in the figure, adjacent routers use directly connected interfaces to establish EBGP neighbor relationships. The Router ID of each device is 10.0.X.X, and the AS number is 6500X, where X is the router number. R1 and R4 both have static routes to 192.168.1.0/24, which are introduced into BGP through import.
Which of the following statements are correct by default? (Multiple choice)
- A . The traffic path from R3 to 192.168.1.0/24 is R3-R2-R1
- B . The traffic path from R5 to 192.168.1.0/24 is R5-R4
- C . The traffic path from R2 to 192.168.1.0/24 is R2-R1
- D . The traffic path from R6 to 192.168.1.0/24 is R6-R5-R4
An enterprise network is shown in the figure. If CE2 is dual-owned by PE2 and PE3, a Type 5 LSA routing loop may occur. The loop can be prevented by setting the route-tag command on PE2 and PE3 devices. When the Route Tag of the route received by PE3 is the same as the local configuration, the route will be ignored.
- A . True
- B . False
There are multiple types of MAC address entries on a switch.
Which of the following entries are manually configured and cannot be aged out?
- A . MUX MAC address entries
- B . Static MAC address entries
- C . Dynamic MAC address entries
- D . Blackhole MAC address entries
When the basic QinQ function is configured on a port of the switch, only when a message with a VLAN Tag is received from the port will the message be tagged with the default VLAN of the port, thereby achieving the purpose of expanding the VLAN space.
- A . True
- B . False
When a network engineer logs in to a NetEngine AR6120 through the console port, he finds that the password is wrong and cannot log in. If the device can still be logged in through the Telnet account and the user account has the permission to change the console port password, he can log in to the device through Telnet and change the console port password.
- A . True
- B . False
IS-IS LSP fragments are identified by the LSP Number field in the LSP ID, which is 4 bits long. Therefore, an IS-IS process can generate a maximum of 256 LSP fragments, and the amount of information it carries is limited. By adding additional system IDs, the IS-IS process can generate more LSP fragments.
- A . True
- B . False
In the IS-IS network shown in the figure, R1 introduces the default route through the "default-route-advertise always level-1" command.
Which of the following descriptions is correct?
- A . A default route will appear in R2’s routing table
- B . A default route will appear in R3’s routing table
- C . No default route will appear in the routing tables of R2 and R3
- D . The default route will appear in both R2 and R3 routing tables