[Nov 23, 2022] Free Huawei H12-891_V1.0 Exam Questions and Answer
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NEW QUESTION 180
The firewall has created some security zones by default, which of the following security zones does not exist by default on the firewall?( Radio).
- A. Trust
- B. Internet
- C. DMZ
- D. Local
Answer: B
NEW QUESTION 181
The HTTP protocol is based on TCP, so http Flood attacks can be defended against HTTP Flood attacks using the TCP Flood attack prevention method.
- A. True
- B. False
Answer: B
NEW QUESTION 182
When configuring the source NAT and having no pat configuration parameters, which of the following statements is true?( Radio)
- A. Perform destination IP address and destination port translation
- B. Simultaneous source P address and source port translation
- C. Only destination IP address translation occurs
- D. Only source P address translation occurs
Answer: D
NEW QUESTION 183
In MPLSVPN, in order to distinguish between IPv4 prefixes that use the same address space, the RD value is added to the IPv4 address, and the following options are described correctly as ?
- A. RD is encapsulated in the Update message as an extended community attribute of BGP during delivery
- B. RD can be used to control the publication of VPN routing information
- C. On a PE device, each VPN instance corresponds to an RD value, and the RD value must be unique on the same PE device
- D. After the PE receives an IPv4 route from CE, it adds an RD to the route to IPv4 that translates to a globally unique VPN-IPv4 route and publishes it on the public network
Answer: C
NEW QUESTION 184
Which of the following options is described correctly for the assertion mechanism?( Radio).
- A. The assertion mechanism is used for the election of DR
- B. Winner's election process does not make IP address size a condition of the election
- C. In the assertion mechanism, the loser will shut down the interface with the broadcast network necklace
- D. In the assertion mechanism, the winner is responsible for forwarding multicast data to the broadcast segment
Answer: D
NEW QUESTION 185
As shown in the figure, an engineer uses four routers to test the interoperability of branch networks, where R1, R2, and R3 in branch 1 deploy OSPF Network interoperability is implemented, and R, R3, R4 in Branch 2 is deployed is-IS to achieve network interoperability. Now that the engineer wants to implement R1 access to R4's loopback address, which of the following actions will meet this requirement?
- A. Publish default routes only in the OSPF process for R2
- B. No configuration is required
- C. In the OSPF process of R2 and the IS-IS process, the default routes are published separately
- D. Publish the default route only in the IS-IS process of R2
Answer: A,C
NEW QUESTION 186
Which is the correct description of optimal routing election for each protocol in the following options?( Radio).
- A. The OSPF protocol puts all the routing information in the LSDB into the IP routing table.
- B. From BGP and OSPF, different route entries to reach the same destination segment are learned, and the optimal route is selected to join the IP route table by comparing the protocol's preference value .
- C. Route entries in BGP that are unreachable for the next hop are also placed in the IP routing table.
In the - D. BGP protocol, the best route to reach the same destination circumference is selected by comparing the cost values of the route entries.
Answer: B
NEW QUESTION 187
Which of the following scenarios send free ARP messages?( Multiple choice questions).
- A. The DHCP client receives an acknowledgment message from the server after it sends it
- B. After the VRRP protocol master and standby role election is completed
- C. When a host connected to the switch issues a Ping message.
- D. When a new host configured with an IP address is connected to the network
Answer: A,B,D
NEW QUESTION 188
The following description of the GVRP interface registration mode in Huawei switches is correct?
- A. When the interface layer two operating mode must be hybird
- B. When the normal registration mode is selected, allow the interface to dynamically register and unregister the VLAN. Logout here includes deleting dynamically learned VLANs and VLANs created natively by the administrator
- C. When fixed registration mode is selected, the interface cannot propagate dynamic VLANs
- D. GVRP when the register mode with forbidden is selected, there are four types of interface registration mode
Answer: C
NEW QUESTION 189
OSPF fast convergence is an extended feature to improve the convergence speed of routing, in which PRC works by speeding up routing computation by performing path calculations only on the affected nodes when the network topology changes.
- A. TRUE
- B. FALSE
Answer: B
NEW QUESTION 190
As shown in the figure, which of the following options satisfies two routers to establish an ISIS neighbor?( Single choice questions).
- A. The ISIS process numbers of the two routers must be consistent.
- B. Both routers remain of the default type.
- C. Both routers are of The Level-1 type.
- D. One of the two routers can be of the Level-1-2 type and the other of the Leve1-1 type.
Answer: B
NEW QUESTION 191
What about the description of IGMP Snooping, is it correct?
- A. IGMP Snooping runs at the link layer and is a multicast constraint mechanism on Layer 2 Ethernet switches that manages and controls multicast groups
- B. IGMP Snooping solves the problem of multicast messages broadcasting in layer 3
- C. IGMP Snooping does not consume the CPU of the switch
- D. IGMP Snooping establishes a MAC multicast address table by listening for IGMP packets sent by the host
Answer: A,D
NEW QUESTION 192
If you delete a declared route entry on a BGP router, the BGP routing ring is triggered to send an Update message for route scattering, which carries the accepted mandatory attribute of the route entry that was discarded.
- A. True
- B. False
Answer: B
NEW QUESTION 193
The following description of the attributes of BGP is correct? Radio
- A. When a BGP Speaker publishes a route learned from an EBCP peer to an IBGP peer, it does not change the next hop attribute of that routing information.
- B. Local_Pref is valid only between EBGP peers and is not advertised to third-party AS
- C. The AS number of the adjacent AS, ranked to the far right of the list of AS_Path in the BGP route entry.
- D. A route can have only one community attribute value.
Answer: A
NEW QUESTION 194
What are the following statements about 8021x, RADIUS, and HWTACACS certification? ( Multiple choice questions).
- A. RADIUS authentication and WTACACS authentication are mutually exclusive and cannot be two-factor authentication for the same user at the same time.
- B. Users can use 8021x authentication to access the network and complete identity authentication through RADIUS
- C. RADIUS authentication is mutually exclusive with 8021x authentication.
- D. RADIUS authentication and HWTACACS authentication can perform two-factor authentication for the same user at the same time, which is more secure.
Answer: A,B
NEW QUESTION 195
Regarding the FTP protocol, which of the descriptions below is correct?
- A. In FTP Passive mode, the client completes the initialization of the TCP session for control and data
- B. FTP always uses a TCP session to transmit control information and data information
- C. FTP always uses TCP port 20 to establish a data session, and ICP port 21 to establish control will always use
- D. In FTP Active mode, the server tells the client which port it expects to send data on by commanding "PORT"
- E. FTP TCP port 21 to establish a data session, TCP port 20 to establish a control session
Answer: A
NEW QUESTION 196
The following description of the link state protocol is plausible?
- A. Fast convergence and low CPU utilization
- B. CPU utilization is high and loops are easy to generate
- C. Slow convergence and low CPU utilization
- D. Fast convergence and high CPU utilization
Answer: D
NEW QUESTION 197
The following description of Link ID, Data, Type, and Metirc in Router-LSA is correct :( Multiple select).
- A. Metric describes the overhead of this connection
- B. Type indicates the type of connection
- C. Data is used to describe additional information for this connection, and different connection types describe different information
- D. The Link ID represents the local identity of this connection, and the different connection types The Link ID represents different meanings
Answer: A,B,C,D
NEW QUESTION 198
ISIS does not send CSNP packets under the P2P network type during the neighbor establishment process.
- A. True
- B. False
Answer: B
NEW QUESTION 199
How many bits are there in the label field of MPLS ?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
NEW QUESTION 200
Which levels are common in the OSI reference model and the ICP/IP model? ( Multiple choice question)
- A. Presentation Layer
- B. Physical Layer
- C. Transmission layer
- D. Session layer
- E. Application Layer
- F. Data link layer
Answer: C,E
NEW QUESTION 201
IS-IS supports the processing and computation of IPv6 routes by adding ATLPs to carry IPv6 addresses and reachability information.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 202
In addition to stateless address autoconfiguration, IPV6 devices can also obtain addresses, gateways, DNS, and other information through DHCPv6
- A. True
- B. False
Answer: B
NEW QUESTION 203
The following description of VLANs in Ethernet is correct?
- A. The range of VLANs is 0 to 4096
- B. VLANs can be extended through QinQ technology.
- C. VLANs do not support bulk creation on devices
- D. The default reserved VLANs for Huawei devices are 4000~4010
Answer: B
NEW QUESTION 204
Compared to IPV4 multicast, which of the following descriptions is the characteristic of IP6 multicast?
- A. IPv6 multicast does not contain MSDP and dense mode
- B. IPv6 multicast clients use IGMPv3 to join multicast groups
- C. IPv6 multicast load sharing extends the multicast routing rules and is completely independent of RPF check
- D. The first 8bit IPV6 multicast address is always FF(11111111).
Answer: D
NEW QUESTION 205
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