[Mar 10, 2023] H12-891_V1.0 Ultimate Study Guide - TestPDF
Ultimate Guide to Prepare H12-891_V1.0 Certification Exam for Huawei Certified ICT Expert in 2023
NEW QUESTION 54
The following statement about ISIS (IPv6) is correct?
- A. In order to support the processing and calculation of IPV6 routes, IS-IS has added TLV232, 236
- B. IS-IS works at the data link layer and only needs to add a new TLV to support IPv6
- C. By default, IS-IS has the multi-topology feature turned on
- D. To support the processing and computation of IPv6 routes, IS-IS has added NLPID to the 129TLV
Answer: A,B,D
NEW QUESTION 55
Which of the following scenarios does not require RPF checking?( Single choice questions).
- A. When a pruning message is received in PIM SM
- B. When the RP in PIM SM establishes the source tree to the multicast source
- C. When a router in PIM SM receives multicast traffic when a shared tree is established to an RP in PIM SM
Answer: B
NEW QUESTION 56
Regarding the sliding window of TCP, what are the following descriptions that are enough to be wrong? ( Multiple choice question)
- A. After the retransmission timer times out, the sender has not received an acknowledgment and will retransmit unacknowledged data
- B. The TCP sliding window allows multiple packets to be sent before an acknowledgment is received
- C. The receiver needs to acknowledge the sender's packet
- D. The sender does not need to transmit messages of full window size
- E. The sender declares the initial window size
- F. Sliding window size can only be increased or remain unchanged
Answer: E,F
NEW QUESTION 57
A medium-sized campus network manages the network through the SNMP protocol, and the campus is highly network-safe, so which version of SNMP is recommended for management?
- A. SNMPv2C
- B. All versions are available to implement
- C. SNMPV3
- D. SNMPv1
Answer: C
NEW QUESTION 58
What is the significance of reserved multicast address 224000~22400255?
- A. This multicast address range is reserved for the management of multicast addresses, which cannot transmit multicast traffic to the Internet
- B. Any legitimate multicast traffic and multicast application Junhui adopts an address change
- C. The multicast address range is reserved for the management of multicast addresses, and is valid locally
- D. The address identifies Global lnternet, and the address range is valid for the entire network
- E. The multicast address range is reserved for link-local multicast traffic, including network control messages, and the address range is only valid locally
Answer: E
NEW QUESTION 59
In a network, the same gigabit running S and OSPF anti-tampering and fluttering as shown in the figure, on the two border routers RTB and RTC are introduced into the wine route, the device question is to use gigabit one port strobe, , 222 The network is introduced into the OSE via impotrote direct on the RTD, assuming that all other configurations are dead default configurations, then the description of this network is wrong ?
- A. RTB learns that the routing next hop for the 2/32 network segment is RTA
- B. Adjusting the ISIS priority to 160 on the RTB avoids suboptimal routing problems in the network.
- C. On the RTC, the following configuration is adopted, only the routes of the 2222/32 cinder segment can be filtered out when routing is introduced, IRTClip ip-prefix 10 index 1 deny2000 8 less-equal 32
- D. The following configuration can filter out the routes of the 2/32 CIDR block of the white RTD when RTC introduces OSPF routes.
Answer: C
NEW QUESTION 60
What descriptions of the OSPF protocol are correct?
- A. AS-External-LSA describes the router's path to ASBR
- B. AS-External-LSA describes the path to the as outside of the route, and the scope of the flood is the AS outside
- C. AS-External-LSA does not belong in any region
- D. The cost value of the second type of external route is only the AS external cost value, ignoring the AS internal cost value
Answer: C,D
NEW QUESTION 61
In a data communication session between two hosts, which level does the session layer of the oSI model of the host on one end communicate with the osl mode of the host on the other end?
- A. Communicate with the physical layer at the other end
- B. Communicate with the presentation layer at the other end
- C. Communicate with the data link layer at the other end
- D. Communicate with the conversation layer on the other end B Communicate with the application layer at the other end
Answer: D
NEW QUESTION 62
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 63
In an MPLS domain, depending on how the LSR handles the data, the LSR can be divided into Ingress LSR, Transit LSR, and Transit LSR Egress LSR? For the same FEC An LSR can be an Iningress LSR for that EC or a Transit for that FEC LSR.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 64
What is the following description of MPLS BGPVPN incorrect?
- A. The TTL field in the label has the effect of preventing loops.
- B. BGP So0, which is used to prevent routes issued from a VPN site from passing through the MPLS backbone and back to that site. So0 is an extended group attribute that MP-BGP automatically generates.
- C. The routing exchange between PE-CE can be static routing, OSPF multi-instance, IS-IS multi-instance, EBGP
- D. IBGP PEes generally use the Loopback interface address to establish a stable BGP neighbor relationship
Answer: B
NEW QUESTION 65
The following statement about the concept of multicast is wrong?
- A. Multicast Group Members: Multicast group members can be widely distributed anywhere in the network
- B. Multicast Groups: A collection identified by ip multicast addresses
- C. Multicast Source: The sender of the message needs to join the multicast group to provide forwarding of multicast group messages
- D. Multicast router: A router or layer-three switch that supports layer-3 multicast functionality
Answer: C
NEW QUESTION 66
Router HW enables OSPF and router HW has the role of ABR and is configured with abr-summary, then which class LSA Will it be aggregated?
- A. 4 kind LSA
- B. 2 kind LSA
- C. 3 kind LSA
- D. 1 Class LSA
- E. 5 Class LSA
Answer: B,D
NEW QUESTION 67
Regarding the cross-domain VPN-OptionB scenario, what is the following description incorrect?
- A. In the process of packet forwarding, the private network LSP of the VPN should be exchanged once on the two ASBRs An EBGP neighbor relationship.
- B. The outer layer label is exchanged between two ASBRs to VPNv4 routes.
- C. Cross-domain VPN An Option
- D. scheme is not limited by the number of interconnection links between ASBRs
Answer: B
NEW QUESTION 68
IPv6 introduces the Solicited-Node address, which is described correctly below (multiple choice)
- A. IPv6 introduced the Solicited-Node address to support IPv6 multicast.
- B. If the Solicited-Node address is not configured , the router automatically generates one on each interface.
- C. The Solicited-Node address on the router interface is automatically generated and can have multiple.
- D. This is a specific address that is used for resolution in ARPv6 The MAC address.
Answer: C
NEW QUESTION 69
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