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Free H12-821_V1.0-ENU Sample Questions and 100% Cover Real Exam Questions (Updated 450 Questions)
NEW QUESTION 266
One of the features of OSPF is that it only supports MD5 authentication.
- A. False
- B. True
Answer: A
NEW QUESTION 267
Regarding the description of VRRP load sharing, which one is correct? (Multiple choice)
- A. Multiple virtual routers can be created on one interface of the router, so that the router can be used as a master router in one virtual router, and at the same time as a backup router in other virtual routers.
- B. When configuring priorities, the VRRP masters of the three virtual routers can be on different routers
- C. Load sharing method refers to the establishment of two or more backup groups, and multiple routers carry services at the same time
- D. The load sharing method means that multiple routers undertake services at the same time, so the load sharing method requires two or more virtual routers
Answer: B,C
NEW QUESTION 268
A medium-sized campus network manages the network through the SNMP protocol. Which version of SNMP does the campus manage?
- A. SNMPv3
- B. SNMPv1
- C. SNMPv2C
- D. All versions can be implemented
Answer: A
NEW QUESTION 269
The network is as shown in the figure, and SWA, SWB, SWC, and SWD run RSTP, then which of the following statement is correct? (Multiple choice)
- A. After being configured as an edge port, the interface can quickly enter the forwarding state
- B. The edge port can be opened on the GE0/0/2 port of SWC, so that the interface connected to the terminal can quickly enter the forwarding state
- C. The edge port can be opened on the GE0/0/2 port of SWB, so that the interface connected to the terminal can quickly enter the forwarding state
- D. After receiving the BPDU, the edge port will participate in the calculation of the spanning tree again
Answer: A,B,D
NEW QUESTION 270
Different from STP, RSTP has only one BPDU type, its value is 2, and there is no TCN BPDU.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 271
D. DoS attack means that the attacker controls a large number of zombie hosts and sends a large number of carefully constructed attack messages to the target network, so that the attacked has the effect of refusing to provide services to the requests of normal users.
- A. False
- B. True
Answer: B
NEW QUESTION 272
IGMPv1 defines a mechanism for electing queriers when there are multiple routers in a shared network.
- A. TRUE
- B. FALSE
Answer: B
NEW QUESTION 273
Which of the following BGP routing attributes is not a recognized attribute?
- A. MED
- B. Origin
- C. AS_ PATH
- D. Local_Pref
Answer: A
NEW QUESTION 274
When two routers exchange database information through DD messages, a master-slave relationship is first formed, and the one with the larger router id must be the master.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 275
The first 4 bits of the IP multicast address are fixed 1110, corresponding to the high 25 bits of the multicast MAC address. Among the last 28 bits of the IP multicast address, only 23it is mapped to the MAC address, so 5 bits of address information are lost. The direct result is that 32 IP multicast addresses are mapped to the same MAC address.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 276
Which of the following description about BGP, OSPF, ISIS is correct?
- A. BGP neighbor relationship is established on the basis of TCP session, and the port number adopted is 179.
- B. BGP runs on the basis of UDP sessions, and the port number adopted is 179.
- C. ISIS runs on the basis of the IF protocol, and the protocol number adopted is 89.
- D. OSPF runs on the basis of IP protocol, and the protocol number adopted is 90.
Answer: A
NEW QUESTION 277
ICMPv6 has two types: Error Messages and Information Messages.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 278
Route redistribution refers to the operation of only advertising routing information from one routing protocol to another routing protocol.
Which of the following statements about route introduction is correct? (Multiple choice)
- A. When implementing route import, you need to pay attention to the routing priority agreements of different vendors may be different
- B. The routing protocol itself has anti-loop characteristics, so there is no need to consider loop issues when routes are imported into each other
- C. By importing routes, routing information can be transmitted between different routing protocols
- D. When implementing route import, route control can also be deployed to achieve flexible control of correct business traffic
Answer: A,C,D
NEW QUESTION 279
Regarding the description of the security level of the firewall security zone, which of the following is false?
- A. The security level can only be set for the custom security zone
- B. In the same system, two security zones are not allowed to configure the same security level
- C. Once the security level is set, it is not allowed to change
- D. The newly created security zone, the system defaults its security level to 1
Answer: D
NEW QUESTION 280
When two routers establish a pair of logical BGP peers through a multi-hop physical link, the peer connect-interface command must be used.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 281
What is the sequence of the VLAN Pool assigning VLANs to the terminal? (Multiple choice)
- A. Terminal access to VAP
- B. Determine the VLAN Pool and VLAN algorithm bound to the VAP
- C. Assign VLAN to the terminal according to the VLAN algorithm
- D. The terminal accesses from the divided VLAN
Answer: A,B,C,D
NEW QUESTION 282
As shown in the figure, RTA, RTB, RTC, and RTD are in the same AS. IBGP neighbor relationships are established through direct links. RTB and RTC are route reflectors. RTA and RTC are the route reflector clients of RTB. RTD is the route reflector client of RTC, and 10.1.1.0/24 is announced into BGP on RTA, and the Originator ID value of the BGP route received on RTD is updated to ().
Answer:
Explanation:
1.1.1.1
NEW QUESTION 283
A network engineer outputs the following information when troubleshooting the OSPF protocol. Based on this to determine which cause the adjacency relationship cannot be established normally?
- A. Process numbers are discordance
- B. Router ID conflict
- C. The IP address code of the interface is discordance
- D. The area code does not match
Answer: D
NEW QUESTION 284
What are the routing tools that are not only used for the BGP routing protocol? (Multiple choice)
- A. ACL
- B. IP-Prefix
- C. as-path-filter
- D. community-filter
Answer: A,B
NEW QUESTION 285
After the modular switch receives the business message, it is processed by the upstream interface board, then processed by the downstream interface board, and finally sent from the interface.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 286
The output information of a router below, which of the following regarding the description of this information is true?
- A. The MED value of the route to the destination network 1.1.1.0/24 is 100
- B. The next hop of the route to the target network 1.1.1.0/24 is 1.1.1.1, and the route is optimal
- C. The MED value of the route to the destination network 5.1.1.0/24 is 50
- D. The next hop of the route to the target network 5.1.1.0/24 is 1.1.1.1 , and the route is optimal
Answer: D
NEW QUESTION 287
When the Hold time supported by two BGP neighbors is inconsistent, the neighbors will negotiate to adopt the lowest Hold time interval that both ends can support.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 288
Regarding the LSA header information on the AS-External-LSA of OSPF, which of the following statement is incorrect?
- A. Advertising Router represents the Router ID of ASBR
- B. Net mask represents the net mask of the destination network segment
- C. Link State lD represents the destination network address
- D. Forwarding Address is always 0.0.0.0
Answer: D
NEW QUESTION 289
How long is the default DHCP address pool lease period?
- A. 1 day
- B. 1 month
- C. 1 hour
- D. 1 week
Answer: A
NEW QUESTION 290
Regarding the OSP command description, which is incorrect? (Multiple choice)
- A. There is no need to use router-id in OSPF v3 configuration, the configuration method is the same as OSPF v2
- B. The difference between OSPF v2 and OSPF V3 configuration interface commands is that OSPF v2 can use the network command, while OSPF v3 is directly enabled on the interface
- C. The no-summary parameter is configured for the stub area and the totally stub area
- D. The stub router command is used to configure the secondary router as a stub router. The stub router can form a neighbor relationship with non-stub routers.
Answer: A,C,D
NEW QUESTION 291
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