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質問 # 186
If the PIM-SM protocol is running in a multicast network, you need to configure RP, and the configuration equation of RP is divided into dynamic RP and static RP. The following configuration description of the RP is correct (radio).
- A. When you configure Dynamic RP, you need to configure BSR as a backup of the RP.
- B. When configuring a static RP, you need to specify the information for the RP on all PIM routers.
- C. When you configure a static RP, you need to configure the BSR to advertise the RP information.
- D. When you configure Dynamic RP, you do not need to configure BSR.
正解：B
質問 # 187
BGP EVPN advertises external routes, which of the following routes?
- A. Type1
- B. Type3
- C. Type2
- D. Type5
- E. Type4
正解：D
質問 # 188
Which is the correct description of optimal routing election for each protocol in the following options? (Radio).
- A. BGP protocol, the best route to reach the same destination circumference is selected by comparing the cost values of the route entries.
- B. The OSPF protocol puts all the routing information in the LSDB into the IP routing table.
- C. 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.
- D. Route entries in BGP that are unreachable for the next hop are also placed in the IP routing table. In the
正解：C
質問 # 189
If a Huawei switch runs the RSTP protocol, when will the BPDUs on a port on the switch be aged?
- A. after the Forward Delay timeout
- B. After Ma ge times out
- C. After more than 6 seconds
- D. On the interface, RSTP does not age BPDU
- E. After Hello time times out
正解：B
質問 # 190
In the forwarding table of the switch, a MAC address can correspond to only one outlet at a time
- A. True
- B. False
正解：B
質問 # 191
What is wrong with the following statement about digital certificates?
- A. Authentication fails when the peer certificate is received within the validity period, but the device itself is in the wrong time if it is not within the validity period of the certificate.
- B. Even if two PRI entities are not in the same CA system, authentication can be completed as long as both parties can recognize each other's CA.
- C. Digital certificates contain public key information.
- D. Digital signatures guarantee the integrity of digital certificates.
正解：B
質問 # 192
Regarding the certification of the ISIS protocol, there is a correct statement
- A. After configuring the connection authentication, the IIH issued by the router must carry the authentication TLV
- B. After configuring zone authentication, the router issues an IIH, SNP, LSP-strap-to-tape authentication TLV
- C. Connection authentication can realize the authentication of the hello messages of Leve-1 and Leve-2
- D. The two routers are configured for area authentication and interface authentication, and the passwords are the same, so the two can establish an isocopied relationship
正解：A、C
質問 # 193
In an MPLS BGPVPN networking that does not enable MPLS penultimate hop pop-up technology. When the message reaches the last hop PE, the message has two layers of labels, and the two layers of label values can be the same.
- A. FALSE
- B. TRUE
正解：B
質問 # 194
Regarding the BGP ring protection mechanism, is the following description correct?
- A. The Cluster List property is used for loop guard within the reflector cluster, and the router rejects the route when it finds that the Cluster List of the route entry contains its own Cluster ID.
- B. The AS_ PATH attribute is used between autonomous systems to prevent ring cats
- C. Routes learned from IBGP are not advertised to IBGP neighbors and are used to prevent routing loops inside the AS.
- D. You can use the AS_ CONFED_SET attribute to prevent loops within a consortium.
正解：B、C、D
質問 # 195
An engineer uses 2 routers to test Pv6 services and runs OSPFV3 to achieve interconnection and interoperability of IPV6 networks. The RI has access to the loopback address of R2. The engineer looks at ri's OSPF3 routing table entry and finds that there is no route reaching the R2 loopback address It can't be caused by which of the following?
- A. R2 does not advertise the loopback address
- B. R2 does not configure the Router ID used in the OSPFv3 process
- C. R2 in area 0 to advertise the loopback into a different OSPFv3 process
- D. R2 does not enable OSPFv3 on the loopback port
正解：A
質問 # 196
If you have a LOCAL AREA NETWORK running 8021D Spanning Tree Protocol, the non-root switch does not receive which parameter under the root switch?
- A. Root cost
- B. MaxAge
- C. Hold time
- D. Hello time
- E. Forward delay
正解：C
質問 # 197
Auto-negotiate mode is to obtain the maximum interface rate and operating mode, the network administrator configures all Ethernet interface rates of a working switch to 10OMbps, and the operating mode is configured as Full-duplex, when a network card is configured After the auto-negotiate workstation is connected to the switch, the negotiation result is that the interface rate is 10OMbps and the working mode is half-duplex, which of the following explanations is the most reasonable for this phenomenon?
- A. At higher port rates and operating modes, the workstation's network interface card cannot be configured as auto-negotiate
- B. Auto-negotiation is not configured on the switch, resulting in the switch not being able to send FLP messages to the workstation, causing the workstation to set its own operating mode to Half-duple
- C. The problem is on the workstation's NIC, mostly due to the aging of the NIC driver on the workstation, which causes the workstation NIC to learn the interface rate and operating mode configured on the switch
- D. STP initializes the port into the blocking state, causing auto-negotiation to fail, so the port should be configured as an edge port
- E. Port rate negotiation is negotiated through the initial port sending FLP, and the operating mode is not negotiated through FLP
正解：B
質問 # 198
As shown below, RI, R2 establish EBGP neighbors, and once turned on, the BFD detection function, the following statement is correct?
- A. RI. The detection time for bFD messages for 660ms
- B. RDetection time for BFD packets for 2 Detection time for BFD messages 800m5
- C. RI Detection time for BFD messages for 1280ms
- D. R2 is 600ms
正解：A
質問 # 199
The following message about OSPFV3 is correct?
- A. The Option field of the Hello and DD packets extends to 24-bit
- B. The LSACK message contains LSA header information to confirm receipt of the LSU message
- C. The Hello message must contain the interface ID of the sending interface
- D. LSR packets containing the full LSA header information for requesting an update to the LSA
正解：A、B、C
質問 # 200
Communityflter has two types of basic group nature filters and advanced group property filters.
Which of the following filters makes the Advanced Group Genus Filter more flexible than the Basic Group Attribute Filter to match group attributes?
- A. IP-prefix
- B. AS-path-filter
- C. Regular-expression
- D. ACL
正解：C
質問 # 201
Among the routing policy tools commonly used by BGP, which ones can be used to filter routes?
- A. lp extecommunity-filter
- B. Traffic-policy
- C. filter-policy
- D. Route-policy
正解：A、C、D
質問 # 202
In the use of the CP protocol, the following description is correct?
- A. The Eth-Trunk interface can be avoided by frequent oscillation interface eth-trunkllacppreemptenablelacppreemptdelaydelay-time by following command
- B. Source A address can be configured for load sharing in an enabled link aggregation group with the following command: interface eth-trunk 110ad-balance src-dst-ip
- C. A member interface can be removed from an enabled link aggregation group with the following command: interface GigabitEthernet0/0/1 shutdown interface GigabitEthernet0/0/1 undo eth-trunk 1 interfaceGigabitEthernet0/0/1undoshutdown
- D. The member interface can be joined in the link aggregation group by enabling the following command: interface GigabitEthernet0/0/1 shutdown interface GigabitEthernet0/0/1 trunkport
正解：A
質問 # 203
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
正解：B
質問 # 204
In an MPLSVPN network, when a packet enters the Internet and is forwarded, it is encapsulated with two layers of MPLS tags, and the processing of the packet in the following options is described correctly?
- A. based on the inner tag. The packet pops up the outer label on the penultimate hop device and forwards it to the Egress PE device
- B. The Egress PE appliance receives an UNlabeled IP packet
- C. The Egress PE device correctly sends packets to the appropriate VPN
- D. The penultimate hop device receives packets with an outer label of 3
正解：A、C、D
質問 # 205
What is the exact description of the SSM features?
- A. Routing multicast traffic in the SSM is done by relying on the number of sources, and the RP is used for the receiver to answer the corresponding number of sources
- B. Using SSM, the receiver can use INCLUDE in IGMPv3 to indicate that the source
- C. SSM he wishes to join is an extension of the DVMP protocol. to efficiently transmit one-to-many communication traffic
- D. SSM requires MSDP to discover active sources in other PIM domains
正解：B
質問 # 206
Huawei's two switches SWA and SWB are connected together by 7 Ethernet cables, and static link clustering is configured, and the corresponding port on the switch SWA is Ethernet 1/0/1?Ethernet1/0/2?Ethernet 1/0/3?Ethernet 1/0/4?Ethernet 1/0/5, Ethernet1/0/6, Ethernet 1/0/7, configured in order of port if the switch SWA, SWB supports only 6 ports per aggregation group
- A. With the same configuration of each port, SWA randomly selects one of the 7 ports as the aggregate group Unselecte port
- B. In the case of consistent configuration of each port, Ethernet 1/0/6 port is an aggregate group Unselected port
- C. In the case of consistent configuration of each port, the Ethernet1/0/1 port is an aggregate group Unselected port
- D. With the same configuration of each port, the Ethernet 1/0/7 port is the aggregate group Unselecte port
正解：D
質問 # 207
Cross-device link aggregation realizes the back-to-back transmission of data traffic and the mutual spare of the heap member switches, but due to the limited bandwidth of the heap cable between the heap devices, the forwarding efficiency can be improved in the following ways?
- A. Connect the stacking device via a stacking card
- B. Configure the stacking system MAC address switching
- C. Enable traffic to be forwarded locally first
- D. Enables the stacking multi-master check function
正解：C
質問 # 208
ICMPv6 has two types: Error Messages and Information Messages.
- A. FALSE
- B. TRUE
正解：B
質問 # 209
The means of the LAND attack is that the attacker sends an SVN packet message with the same source and destination addresses to the target host, the source port and the destination port are the same, and the receiver waits for the final ACK packet to be sent, the connection is always in a semi-connected state, resulting in a full limited TCP reception Waste of resources
- A. False
- B. True
正解：B
質問 # 210
The interface Serial0 of an existing router is in OSPF area 1, and the interface Serial0 is set to Silent interface. So what kind of impact will this setting have
- A. OSPF establishes available adjacencies through this interface
- B. OSPF receives routing updates from neighbors
- C. OSPF does not add routes learned from the interface to the local routing table
- D. OSPF does not establish any neighboring relationships through this interface
正解：D
質問 # 211
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