Huawei H12-221_V2.5-ENU HCIP-Routing & Switching-IERS V2.5 Online Training
Huawei H12-221_V2.5-ENU Online Training
The questions for H12-221_V2.5-ENU were last updated at Nov 20,2024.
- Exam Code: H12-221_V2.5-ENU
- Exam Name: HCIP-Routing & Switching-IERS V2.5
- Certification Provider: Huawei
- Latest update: Nov 20,2024
Regarding the distribution tree, which of the following description is correct? (Multiple Choice)
- A . The multicast distribution tree with the multicast source as the root and the multicast group members as the leaves is called RPT.
- B . The multicast distribution tree with RP (RENDEZVOUS POINT) as the root and multicast group members as leaves is called SPT.
- C . SPT is applicable to both PIM-DM and PIM-SM
- D . RPT is applicable to both PIM-DM and PIM-SM
Regarding the LSA of all kinds of message, which of the following description is wrong?
- A . DD type LSA only contains the summary information of LSA, that is, it contains LS TYPE, LSID, ADVERTISING ROUTER and LS SEQUENCE NUMBER
- B . LS REQUEST message only has LS TYPE, LS ID and ADVERTISING ROUTER
- C . LS UPDATE packet contains complete LSA information
- D . LS ACK packet contains complete LSA information
Which of the following reasons can cause the BGP neighbor relationship to fail to be established?
- A . An ACL that blocks all TCP connections is configured between the two BGP neighbor relationships
- B . IBGP neighbors are not directly connected physically.
- C . bgp synchronization is enabled in the fully interconnected IBGP neighbor relationship
- D . The update time between the two BGP neighbors is inconsistent.
When using manual link aggregation mode, which of the following description regarding adding member interfaces is wrong?
- A . Eth-Trunk interfaces cannot be nested, that is, member interfaces cannot be Eth-Trunk.
- B . An Ethernet interface can only be added to any th-Trunk interface. If you need to add another Eth-Trunk interface, you must first exit the original Eth-Trunk interface.
- C . If the local device uses Eth-Trunk, the peer interface directly connected to the member interface must also be bundled as an Eth-Trunk interface so that both ends can communicate normally.
- D . Eth-Trunk has two working modes: Layer 2 working mode and Layer 3 working mode. Two working modes are automatically recognized, no need to switch manually.
Regarding the static LACP mode, which of the following statement is wrong?
- A . When you need to provide a larger link bandwidth between two directly connected devices and the opposite device does not support the LACP protocol, you can choose to use the manual load sharing mode.
- B . In static LACP mode, the greater the LACP priority value of the interface, the higher the priority, the easier it is to select the active port.
- C . In the static LACP mode, the interface that forwards data is called the active interface, and the interface that does not forward data is called the inactive interface. Only when the active interface fails, the backup interface can be changed from an inactive interface to an active interface.
- D . If preemption is enabled, the backup interface with high quality and failure level will become the active interface after a certain time delay after the active interface fails; if preemption is enabled, the failed interface cannot automatically become the active interface.
MUX VLAN provides a mechanism for network resource control through VLAN. Which of the following concepts do not belong to MUX VLAN?
- A . Primary VLAN
- B . Slave VLAN
- C . Guest VLAN
- D . Interworking VLAN
In the process of BGP establishing a neighbor, when TCP cannot be successfully established, what is the status of the neighbor?
- A . Idle
- B . Active
- C . OpenSent
- D . Establish
MSTP solves many shortcomings of the single spanning tree of RSTP and STP. Regarding the MSTP, which of the following description is correct?
- A . Each MST INSTANCE uses a separate STP algorithm to calculate a separate spanning tree
- B . Each MST INSTANCE has an identifier, MSTID is a one-byte integer
- C . All VLANs are mapped to MST INSTANCE 1 by default
- D . MSTP allows one or more VLANs to be mapped to a MST instance, MSTP calculates the root switch separately for each MST INSTANCE, and sets the port status separately
When a router running BGP receives a route with an unreachable next hop, how to deal with it?
- A . Send an error message to the router that issued the Update.
- B . Refuse to join the BGP routing table, and silently discard it.
- C . Receive the route and add it to the BGP routing table. But this route will not be preferred by BGP and will not be added to the IP routing table.
- D . Receive the route, add it to the BGP routing table, and participate in the BGP routing rules. It may be selected as the best route and add it to the IP routing table.
In the broadcast network, what mechanism does the IS-IS protocol use to ensure the reliability of neighbor relationship establishment?
- A . State synchronization
- B . Checksum
- C . Aging timer
- D . Three handshake
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