[Nov 13, 2021] H12-261-ENU Exam Dumps PDF Guaranteed Success with Accurate & Updated Questions
Pass H12-261-ENU Exam - Real Test Engine PDF with 525 Questions
NEW QUESTION 142
If a switch runs RSTP, which interface on the switch will send BPDU carrying the Proposa logo?
- A. Root port in the Blocking state
- B. Alternate port
- C. The specified port in the forwarding state
- D. Designated port in non-forwarded state
Answer: D
NEW QUESTION 143
A bookstore provides a wired network for customers to learn online. However, some users are found unable to access the network one day. After checking, the IP resource of the DHCP address pool has been exhausted. Which of the following is the best way to solve the current problem?
- A. Configure a static ARP binding table.
- B. Configure IPSG
- C. Limit the maximum number of DHCP snooping binding entries that an interface can learn.
- D. Configure DAI
Answer: C
NEW QUESTION 144
A newly deployed HW router is configured for Weighted Random Early Discard (WRED) on the HW network.
WRED has which of the following characteristics? (Multiple Choice)
- A. For packets of different priorities, WRED can set different packet drop thresholds and packet loss ratios.
- B. Global Synchronization is avoided by selectively dropping packets from multiple TCP flows.
- C. When the minimum threshold is crossed, WRED begins dropping all incoming packets (tail-drop).
- D. Low bandwidth flows are experiencing packet drop at a higher rate than higher bandwidth flows.
Answer: A,B
NEW QUESTION 145
Which of following statements is true about the domain-authentication-mode md5 hello command in the IS-IS process?
- A. ISIS certification cannot be applied in IPv6 environment.
- B. The routing domain authentication is used to carry the authentication information during the delivery process of SNPs and LSPs of Level-1 and Level-2.
- C. This command is mainly used to enable ISIS Hello packets to carry authentication information during the delivery process.
- D. The domain authentication mode of all routers in the same routing domain is MD5, the password is hello, and the ISIS SNP and LSP are flooded.
Answer: D
NEW QUESTION 146
The HTTP protocol is based on TCP, so you can use the TCP Flood attack defense method to defend against HTTP Flood attacks.
- A. True
- B. False
Answer: B
NEW QUESTION 147
In RSTP, which port can provide the backup path to reach the root node of the spanning tree? What status is the port in?
- A. Root port and Listening status
- B. Alternate port and Discarding status
- C. Designated port and Listening status
- D. Alternate port and Learning status
- E. Alternate port and Forwarding status
Answer: B
NEW QUESTION 148
The following statement about the NSSA area, which is correct.
- A. In the OSPF neighbor relationship sent by the OSPF neighbor, the N position in the option field is set to 1. The E position is 0.
- B. The OSPF neighbor in the NSSA area sends the he1lo text. The N position in the option- field is 0, and the E position is 1.
- C. A default LSA must be automatically generated in the NSSA area to access the external network.
- D. The NSSA area generates seven types of LSAs to advertise external routes. The FA address in the seven types of LSAs is used to prevent loops.
Answer: A
NEW QUESTION 149
Which type of prefix will the router running BGP advertise to its own IBGP neighbor (assuming the router is not configured as a route reflector)?
- A. Prefix existing in routing shows
- B. The prefix is learned through the EBGP neighbor, or the prefix is learned locally through the network or route introduction.
- C. The prefix is learned through other IBGP neighbors, or the prefix is learned from the EBGP neighbor, or the prefix is learned through the route introduction.
- D. The prefix is learned through other BGF neighbors, or the prefix is locally learned through network or route introduction.
- E. The prefix is learned through the EBGP neighbor, or the prefix is learned from the RR.
Answer: B
NEW QUESTION 150
The administrator wants to manage some routes on the router during operation and maintenance. Which of the following tools can mark these routes so that the administrator can configure the policy? (Multiple choice)
- A. Mark the route on the router using the Tag value.
- B. Use ip-prefix to mark the route on the router.
- C. If the BGP protocol is running, use the community attribute to mark the route.
- D. Use ACLs to mark routes on the router.
Answer: A,C
NEW QUESTION 151
For the Layer 2 VPN technology, which of the following statement is correct? (Multiple choice)
- A. The VPLS configuration is highly complex. The Layer 2 network transparently transmits BUM packets.
- B. VPLS is a widely used technology on the live network. It can provide Layer 3 packet transparent transmission and achieve multi-point access.
- C. BGP EVPN supports tenant isolation, multi-homing and broadcast suppression
- D. BGP EVPN solves the problem of MAC address drift and multi-tenancy that VPLS cannot support.
Answer: A,C,D
NEW QUESTION 152
ISIS will elect DIS in the broadcast multi-access network. Which of the following statement about DIS is correct? (Multiple Choice)
- A. In a broadcast multi-access network, the DIS sends Hello PDUs three times as often.
- B. ISIS elects the DIS by comparing the priorities, and compares the MAC addresses if the priorities are the same.
- C. DIS guarantees database synchronization by periodically sending CSNP messages
- D. DIS supports the preemption function. After the new DIS preemption is successful, it does not need to flood any LSPs.
Answer: A,B,C
NEW QUESTION 153
Two routers are connected through the serial port, but the interconnect interface cannot be pinged. Now check the port status as follows:
From the above information can determine what is the reason?
- A. Link bandwidth is not enough
- B. Link layer protocol is inconsistent
- C. The IP address is not on the same network segment.
- D. Subnet mask does not match
Answer: B
NEW QUESTION 154
The network administrator prepares to use the 6to4 automatic tunnel to carry IPv6 data on the IPv4 network. The IPv4 address of the router interface is 138.14.85.210, so the corresponding tunnel address is 2001:8a0e:55d2:1:230:65ff:fe2c:9a6.
- A. True
- B. False
Answer: B
NEW QUESTION 155
As shown in the figure, R1 and R2 are PPP links, and the direct connection ports are not on the same network segment, but the R1 and R2 direct connection ports can communicate, and the Ethernet link cannot communicate under the same IP planning.what are the reasons? (Multiple Choice)
- A. R1 and R2 are connected to the POS port, and the 24-bit subnet route of the direct connection port of the other party is learned through IPCP.
- B. R1 and R2 are connected to the POS port, and the 32-bit host route of the direct connection port of the other party is learned through IPCP.
- C. The data packets of the interconnected POS interface of R1 and R2 do not need to encapsulate the Ethernet header, and do not need to use ARP to request the MAC address.
- D. The interconnected POS port of R1 and R2 learns the MAC address of the peer interface through LCP, and does not require the ARP request MAC address.
Answer: B,C
NEW QUESTION 156
Which of the following description is true about the ISIS LSP fragmentation extension?
- A. ISIS routers can generate up to 1024 shards.
- B. ISIS's fragmentation extension is equally valid for Hello packets.
- C. ISIS's fragmentation extension is achieved by adding virtual systems that can scale up to 1000 virtual systems.
- D. Enable the ISIS router to generate more LSP fragments to carry more ISIS information.
Answer: D
NEW QUESTION 157
The interface Serial0 of an existing router is in OSPF area 1, and the interface Serial0 is set to the Silent interface, so what effect does this setting have?
- A. OSPF establishes available adjacencies through this interface.
- B. OSPF will receive routing updates from neighbors
- C. OSPF does not establish any adjacencies through the interface.
- D. OSPF does not add routes learned from the interface to the local routing table.
Answer: C
NEW QUESTION 158
The description of configuring BGP4+, which is correct? (Multiple choice)
- A. BGP4+ must use the Link-Local address when specifying the peer
- B. When BGP4+ configures a reflector, the roles of the reflector and the client must be consistent with the configuration of BGP4.
- C. The next hop of the BGP4+ route does not use the Link-Local address.
- D. BGP4+ does not support route reflectors.
- E. The BGP4+ router-ID is the same as the BGP4 router-ID.
Answer: C,E
NEW QUESTION 159
As shown in the figure, in the hub&spoke multicast mode of MPLS bgp VPN, in order to realize that the branch can only communicate with the headquarters, the branches cannot communicate with each other. Which of the following schemes can the RT be set?
- A. Headquarters: Import Target: 2:2 Export Target: 3:3 Branch 1: Import Target: 3:3 Export Target: 1:1 Branch 2: Import Target: 3:3 Export Target: 2:2
- B. Headquarters: Import Target: 1:1 Export Target: 3:3 Branch 1: Import Target: 3:3 Export Target: 1:1 Branch 2: Import Target: 3:3 Export Target: 2:2
- C. Headquarters: Import Target: 12:3 Export Target: 12:3 Branch 1: Import Target: 12:3 Export Target: 12:3 Branch 2: Import Target: 12:3 Export Target: 12:3
- D. Headquarters: Import Target: 12:3 Export Target: 3:12 Branch 1: Import Target: 3:12 Export Target: 12:3 Branch 2: Import Target: 3:12 Export Target: 12:3
Answer: D
NEW QUESTION 160
Which of the following belong to single package attack? (Multiple Choice)
- A. DDoS attack
- B. Malformed package attack
- C. Special control package attack
- D. Scanning detection attack
Answer: B,C,D
NEW QUESTION 161
Which of the following statements is true about the database synchronization process on an IS-IS broadcast network?
- A. As the DIS, R2 sends a CSNP packet periodically.
- B. The interval at which R2, as the DIS, sends Hello packets is three times that of other routers.
- C. R1 and R3 maintain the database consistency by sending PSNP packets periodically.
- D. As the DIS, R2 does not receive the PSNP requests from other routers.
Answer: A
NEW QUESTION 162
Through the following displayed command, you can determine that switch loop fault is caused by ().
- A.
- B.
- C.
- D.
Answer: A
NEW QUESTION 163
Which of the following description about the information of BGP4+ is correct?
- A. Bgp4+ can use dampening command to suppress IBGP routes.
- B. Modifying the BCP's router ID will cause the BGP connection between the routers to be re-established.
- C. bGP4+ does not support automatic route aggregation.
- D. The Next Hop attribute in BCP4+ is represented by the Pv6 address, which can be the link-local address of the next hop.
Answer: A,B,C
NEW QUESTION 164
Which of the following attributes cannot be directly referenced by the if-match of a routing policy?
- A. Regular expressions
- B. Community-filter
- C. IP-prefix
- D. As-Path-filter
Answer: A
NEW QUESTION 165
You are assigned the task of compressing the IPV6 address as much as possible. If the original IPV6 address is 2013:0000:130F:0000:0000:09c0:876A:130B, which of the following is the compressed format IPV6 address?
- A. 20130:130F:0:0:9C0:876A:130B
- B. 20130:130F::9C0:876A:130B
- C. 2013:130F:9C0:876A:130B
- D. 213:13F:9C:876A:13B
- E. 20130:130F:0:0:090:876A:130B
Answer: B
NEW QUESTION 166
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