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Huawei H12-891 - Questions & Answers

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Question 1
Single choice

The DHCP protocol is responsible for assigning various TCP/IP-related parameters to clients. As part of this process, DHCP uses a set of messages that are encapsulated at the transport layer.

What is the encapsulation method used by these DHCP messages?

A.

PPP package

B.

IP encapsulation

C.

TCP encapsulation

D.

UDP encapsulation

Question 2
Single choice

In different scenarios, RSTP provides different protection functions.

Which of the following statements about these protection features is incorrect?

A.

Enabling root protection on a specified port restricts its role to the designated type only.

B.

With the anti-TC-BPDU packet attack feature enabled, the rate at which the switching device processes IC BPDU packets can be configured per unit time.

C.

When BPDU protection is enabled, if an edge port receives an RST BPDU, it becomes a non-edge port and the spanning tree recalculation is performed.

D.

When root protection is enabled on a specified port and it receives a superior RST BPDU, it enters the Discarding state and ceases forwarding packets. If no superior RST BPDU is received for a period, it automatically returns to the normal Forwarding state.

Question 3
Single choice

In a VXLAN network, what component is responsible for connecting traffic to the VXLAN network and facilitating communication within the same subnet of the VXLAN network?

A.

NVE interface

B.

VXVAN L2 Gateway

C.

VXLAN L3 Gateway

D.

VLANIF interface

Question 4
Single choice

SSH uses asymmetric encryption algorithms AES and DES to achieve security for data transmission, and uses HMAC to ensure the complete integrity of integer data.

A.

TRUE

B.

FALSE

Question 5
Multiple choice

Which of the following IEEE standards is specific to Gigabit Ethernet? (Choose two)

A.

8023z

B.

8023ab

C.

8023ad

D.

8023af

Question 6
Multiple choice

In the BSR/RP mechanism in a PIM-SM (Protocol Independent Multicast - Sparse Mode) domain, which of the following statements are correct? (Choose three)

A.

There can be multiple Candidate BSRs (C-BSR) in the PIM-SM domain, but only one BSR can be elected.

B.

The BSR collects Candidate RP (C-RP) information by receiving packets from C-RPs.

C.

The BSR advertises the BSR and C-RP information to all routers in the PIM-SM domain by flooding bootstrap messages.

D.

A Candidate BSR (C-BSR) can also collect C-RP information by receiving packets from C-RPs.

Question 7
Single choice

In an MSTP environment, MSTP switches treat RSTP switches as a single MSTP domain. When MSTP is formed by a single switch, it translates RST BPDU into MST BPDU with the IRPC set to 0.

A.

True

B.

False

Question 8
Single choice

ICMPv6 uses the Type field to identify the message type. Based on the value of the Type field, ICMPv6 messages can be divided into two categories: error messages and informational messages.

A.

True

B.

False

Question 9
Multiple choice

As a network administrator, which of the following protocols can I use for network device configuration? (Choose two)

A.

SSH

B.

NETCONF

C.

LLDP

D.

SNMP

Question 10
Single choice

How do the IEEE 802.1D (STP) and IEEE 802.1w (RSTP) standards handle Bridge Protocol Data Units (BPDUs)?

A.

An 802.1D bridge only forwards BPDU packets received from the root bridge.

B.

An 802.1D bridge does not forward BPDU messages.

C.

An 802.1w bridge forwards only BPDU packets received from the root bridge.

D.

An 802.1w bridge does not forward BPDU packets.

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