素晴らしいH12-891_V1.0-ENU試験問題集試そうH12-891_V1.0-ENU問題集PDF
H12-891_V1.0-ENU問題集PDFでH12-891_V1.0-ENUリアル試験問題解答
質問 # 93
The command to configure VRRP preemption delay is?
- A. vrrp vrid 1 timer delay 20
- B. vrrp vrid 1 preempt-timer 20
- C. vrrp vrid 1 preempt-delay 20
- D. vrrp vrid 1 preempt-mode timer delay 20
正解：D
質問 # 94
BGP authentication can prevent illegal routers from establishing neighbors with BGP routers, BGP authentication can be divided into MD5 authentication and Keychain authentication, please ask which BGP messages will be carried below BGPKeychain authentication information? (Multiple select).
- A. Notification
- B. Open
- C. Update
- D. Keeplive
正解：A、B、C、D
質問 # 95
What kind of scenario can use AS-path-filter? (Multiple select).
- A. The apply clause in Route policy
- B. Filter routes sent to BGP neighbors based on the AS PATH attribute that the route carries. For example, the command peer x.x.x.x as path-filter export
- C. The if-match clause in Route-policy
- D. A Filters routes received from BGP neighbors based on the AS PATH attribute carried by the route, such as the command peer X.x.x.x as path-filter import
正解：B、C、D
質問 # 96
The following statement about the five types of LSAs in OSPF is used to pass external routes, and the following statement about the five types of LSAs is incorrect and flooding in
- A. OSPF networks in non-Stub/NSSA regions
- B. Routers in the same zone as ASBR can calculate external routes by chanting the LSA and the five types of ISAs in the region
- C. The FA address is included in the five types of LSAs, and the FA address is 000 only as reserved for no practical purpose
- D. Configuring the appropriate filtering policy on the ABR or ASBR can filter five types of LSAs
正解：C
質問 # 97
Link state information is isolated by default between different IS-IS processes on the same router.
- A. TRUE
- B. FALSE
正解：A
質問 # 98
Is the following description of ospf virtual links correct?
- A. Virtual links can be used to solve the problem of zone 0 being segmented
- B. The cost of a virtual connection is zero and is the optimal link
- C. A virtual connection can be established in any area, after which it itself belongs to the region
- D. The virtual connection ip is used as the link address
正解：A
質問 # 99
Which timer for spanning tree protocol dictates how often to see the root bridge send configuration BPDUs?
- A. forwarding delay timer
- B. HOLD timer
- C. Maxage timer
- D. Hello timer
- E. STP timer
正解：D
質問 # 100
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. To support the processing and computation of IPv6 routes, IS-IS has added NLPID to the 129TLV
- D. By default, IS-IS has the multi-topology feature turned on
正解：A、B、C
質問 # 101
WRED is configured on the newly deployed router HW.
What is the correct description of the WRED features below? (Multiple choice questions).
- A. Avoid global synchronization by selectively dropping multiple TCP streams
- B. Low-bandwidth traffic is easier to drop than high-bandwidth traffic
- C. WRED can set different drop thresholds and packet loss rates for packets of different priority
- D. When the flow exceeds the minimum threshold, WRED begins to discard all inlet flow (tail drop)
正解：A、C
質問 # 102
Router R1 runs the OSPF protocol, use the "display ip routing-table" command to view the routing table of the router R1, the following about the OSPF in the routing table.
Is the information described correctly?
- A. In the routing table, the routing table entries identified by the "OSPF" identifier can only pass Class 1 LSA
- B. In the routing table, the routing table entries identified by the "OSPF" identifier can be learned through the 1/2/3/5 LSA
- C. In the routing table, route table entries identified by the "OSPF" identifier can only be learned through LSAs of Type 3
- D. In the routing table, the routing table entry identified with the "O_ASE" identifier can only be learned by routing introduction
正解：D
質問 # 103
Configure the ipv6 preference under the IS-IS protocol view, the role of this command is to configure the priority of the Ipv6 protocol generated by the IS-IS protocol
- A. TRUE
- B. FALSE
正解：A
質問 # 104
As shown in the figure, three switches S1, SW, and SN3, where SWI is the root bridge, and link congestion occurs between SI and SW2, SWD cannot receive the configuration BPDU sent by the root bridge, which spanning tree protection mechanism does the administrator need to configure to prevent the problem caused by link congestion? (Single choice questions).
- A. PreventS TC-BPDU attacks
- B. root protection
- C. BPDU Protection
- D. Loop Protection
正解：D
質問 # 105
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. TRUE
- B. FALSE
正解：A
質問 # 106
The following statement about IPv6 Over VXLAN is wrong as? (Single choice questions).
- A. The tunnel between VXLAN Layer 2 and Layer 3 gateways is an IPv4 network.
- B. IPv6 Over VLANs do not generate ND table entries.
- C. IPv6 over VXLAN solves the problem of insufficient IP address resources for end tenants.
- D. IPv6 over VXLAN means that the Overlay network of the VXLAN is an IPv6 network.
正解：B
質問 # 107
The main routing policy tools that BGP can use are Filter-policy and Route-policy, where Fate-policy can only filter routes and Route-policy can only modify routes
- A. FALSE
- B. TRUE
正解：A
質問 # 108
What is the following correct for the process of registering the source-side DR with RP in PIM-SM?
- A. Registered packets are multicast packets.
- B. Encapsulated in the registered message is multicast service data
- C. RP sends a registration stop message as soon as it receives the registration message.
- D. Registered messages are used to build the RPT tree between source DR and RP
正解：B
質問 # 109
In order to reduce the number of OSPF routes in certain areas, the OSPf protocol has developed special area functions, and the following description of the characteristics of OSPF special areas is correct
- A. ASBR-Sunmary-LSA is allowed to be published to the NSSA region
- B. Zone can be equipped with zhiyi
- C. AS-External-LSA is allowed to be published to the Stub region
- D. Any OSPF zone can be configured as a special zone
正解：B
質問 # 110
The DHCP protocol assigns to clients-some TCPIP-related parameter information-in the process DHCP defines a variety of messages that are encapsulated at the transport layer :(sortic).
- A. UDP Encapsulation
- B. IP encapsulation
- C. TCP Encapsulation
- D. PPP package
正解：A
質問 # 111
Protocols with TCP ports 443, 179, 137, 110, and 23 are, in order: radio
- A. LDAP, SNMP, TFTP, POP3, Telnet
- B. HiPS, BGP, NetBios Name Server, POP3, TelnetE. BGP, POP3, SNMP, TFTP, Teinet
- C. HTTPS, SNMP, POP3, DNS, Telnet
- D. Finger, DHCP Server, NetBios Name Server, POP3, TelnetB
正解：B
質問 # 112
Which IPV6 address would you ping to confirm that OSPFv3 is capable of pastoring unicast messages over the link?
- A. Site local Multicast
- B. Unique Local Add
- C. Anycast Address
- D. Link Local Address
- E. Global Address of the link
正解：B、D、E
質問 # 113
BGP EVPN advertises external routes, which of the following routes?
- A. Type5
- B. Type4
- C. Type1
- D. Type2
- E. Type3
正解：A
質問 # 114
In an MPLS VPN network, different CE devices exchange routing information with the same PE device using different routing protocols, and different CE devices use routing protocols that are independent of each other
- A. False
- B. True
正解：B
質問 # 115
Regular expressions can be used for Community-filter and AS-path-filter definition attribute types for route filtering.
- A. False
- B. True
正解：B
質問 # 116
?? Route? Policy??:ip community-filter Ipermit 100: 1 ip as-path-filter 2 permit ^I00$ route-policy test permit node 10 if-match communityfilter 1 if-match as-path-filter 2 apply as-path 200 Is the above configuration description correct?
- A. The BGP route matches the above only if the BGP route carries a community attribute value of 100:1 or if the AS PATH is 100 route one policy. The AS-one PATH attribute that matches the route is changed to 200
- B. The BGP route matches the above only if the BGP route carries a community attribute value of 100:1 and the AS-One PATH is 100 route policy?. The AS-PATH nature of the matching route is changed to 200
- C. Only if the BGP route carries an AS-PATH of 100, the BGP route matches the route one policy above. The AS-one PATH attribute that matches the route is changed to 200
- D. As long as the BGP route carries a community attribute value of 100:1, the BGP route matches the route-policy above. The AS-PATH attribute of the matching route is changed to 200
正解：B
質問 # 117
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