[Sep-2021] H12-221-ENU Pre-Exam Practice Tests | Exam Questions and Answers for HCNP-R&S Study Guide
HCIP-Routing&Switching-IERS(Huawei Certified ICT Professional-Implementing Enterprise Routing and Switching Network) Certification Sample Questions
NEW QUESTION 190
In an OSPF routing domain, on a broadcast network and an NBMA network that contain at least two routers, one router must be designated as a DR and the other as BDR.
- A. TRUE
- B. FALSE
Answer: B
NEW QUESTION 191
Compared to traditional unicast and broadcast, what can IP multicast be used to?
- A. Application in multimedia conferences
- B. Reduce network load
- C. Application in IPTV
- D. Effectively save network bandwidth
Answer: A,B,C,D
NEW QUESTION 192
IGMP stipulates that when there are multiple routers in shared network, the IGMP protocol itself elects the querier.
- A. False
- B. True
Answer: A
NEW QUESTION 193
For link-state routing protocols, such as OSPF and IS-IS, filtering the route in the inbound direction with filter-policy can block the transmission of link state information, so that the filtered route cannot be added to the local routing table.
- A. TRUE
- B. False
Answer: B
NEW QUESTION 194
Which of the following description is correct about the OSPF neighbor state machine?
- A. In the Init state, the router has received Hello packets from the neighbor and found itself in the neighbor list of the neighbors sending Hello packets.
- B. DROther will eventually form a null state
- C. Attempt status only appears on NBMA and P2MP networks
- D. In the 2-way state, two-way communication has been established, but no neighbor relationship has been established with the neighbor.
Answer: D
NEW QUESTION 195
The peer default-mute-advertise command is used by BGP to advertise default routes to neighbors. At the same time. Which of the description of the changes in the local BGP routing table is correct?
- A. No impact, no default route is generated in the local BGP routing table.
- B. Generate a default route in the local BGP routing table and send it to the IP routing table based on the routing result.
- C. An inactive default route is generated in the local BGP routing table but is not delivered to the IP routing table.
- D. An active default route is generated in the local BGP routing table and delivered to the IP routing table.
Answer: A
NEW QUESTION 196
Regarding the description of the OSPF external route type, which of the following is correct?
- A. The AS external cost value of the first type of external route is considered to be much larger than the AS internal cost value.
- B. The AS external cost value of the first type of external route is considered to be the same order of magnitude as the AS internal cost value.
- C. The AS external cost value of the second type of external route is considered to be the same order of magnitude as the AS internal cost value.
- D. VRP default ospf introduces external routes as the first type of external routes.
Answer: B
NEW QUESTION 197
What mechanism does the IS-IS protocol use to ensure the reliability of neighbor relationship establishment on broadcast networks?
- A. Checksum
- B. Three-way handshake
- C. Aging timer
- D. Status synchronization
Answer: B
NEW QUESTION 198
A switch runs MSTP. The relevant configuration information is shown in the figure. According to the configuration of the command, it indicates that for Instance 1, the role of the switch is:
- A. Cannot judge
- B. Non-root switch
- C. Root switch
- D. Slave switch
Answer: C
NEW QUESTION 199
Which of the following description of the rules of route filtering is wrong?
- A. You can use filter-policy for filtering, or use ip-prefix for filtering.
- B. Route filtering can filter routes in the inbound direction. For link-state routing protocols, only routes are not added to the routing table.
- C. Route filtering can filter routes in the outbound direction, and both route information and link state information can be filtered.
- D. Route filtering can filter routes imported from other routing protocols, but it can only be filtered in the outbound direction.
Answer: C
NEW QUESTION 200
In the MSTP protocol, each MST Instance uses the RSTP algorithm alone to calculate a separate spanning tree.
- A. True
- B. False
Answer: A
NEW QUESTION 201
The default value of the ospf dr-priority command is 1, which ranges from 0 to 255.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION 202
Which description about the characteristics of the routing policy is correct?
- A. Apply application command policy-based-route.
- B. Manual hop-by-hop configuration is required to ensure that packets are forwarded according to policies.
- C. Based on the forwarding plane, service for forwarding strategy.
- D. Forwarding based on the destination address according to the routing table
Answer: D
NEW QUESTION 203
Which of the following description about the special area of OSPF is wrong?
- A. The difference between the Totally Stub area and the NSSA area is that the area does not allow inter-domain routing.
- B. The role of the Totally Stub Area is to allow the LSA3 default route advertised by the ABR, which does not allow AS external routes and inter-area routes. The difference between
- C. The difference between the NSSA Area and the Stub area lies in that this area allows the introduction of external routes to the AS. The ABR advertises the LSA7 to advertise this area to the local area.
- D. Stub Area and Totally Stub area is that this area allows inter-domain routing.
Answer: C
NEW QUESTION 204
The peer command can be used to manually specify neighbors in MBMA network of OSPF.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION 205
Regarding the BGP AS number, which of the following descriptions are wrong? (Multiple Choice)
- A. Devices that support 4-byte AS numbers are not compatible with devices that support 2-byte AS numbers.
- B. When a 2-byte AS is supported, the value ranges from 1 to 65535.
- C. A homemade system can have multiple AS numbers
- D. When a 2-byte AS is supported, the private AS number ranges from 64512 to 65535.
Answer: A,B,C
NEW QUESTION 206
Regarding the description of the BGP state machine, the error is:
- A. In the Active state, BGP will attempt to establish a TCP connection, which is the intermediate state of BGP.
- B. In the Established state, BGP peers can exchange Update packets, Route-refresh packets, Keeplive packets, and Notification packets.
- C. The status of both BGP peers must be OpenConfirm. The BGP neighbor relationship can be established. The two parties exchange routing information through Update packets.
- D. In the Idle state, BGP rejects any incoming connection requests and is the initial state of BGP.
Answer: D
NEW QUESTION 207
The following about MUX VLAN, which is correct?
- A. MUX VLAN must configure MUX VLAN enable function on the port to implement the normal MUX VLAN function.
- B. You do not need to configure the master VLAN and then configure the slave VLAN in the MUX VLAN.
- C. Only one interworking slave VLAN can be configured in the MUX VLAN.
- D. The master VLAN and slave VLAN can be the same VLAN in the MUX VLAN.
Answer: A
NEW QUESTION 208
Which of the following is true about OSPF protocol? (Multiple choice)
- A. The cost of the external route of the second type is only the external cost of AS, and the internal cost of the AS is ignored.
- B. AS-Externa|-LSA describes the path from the router to ASBR.
- C. AS-Externa|-LSA does not belong to any area.
- D. AS-Externa|-LSA describes the path to the external route of the AS. The scope of the flooding is outside the AS.
Answer: A,C
NEW QUESTION 209
The above information about the output of the display ospf peer, which is correct?
- A. Address: 10.1.1.1 indicates that the local interface address is 10.1.1.1.
- B. The designated router (DR) address is 10.1.1.1.
- C. Router ID indicates that the local router ID is 10.1.1.1.
- D. During the DD exchange process, the local end becomes the Slave.
Answer: B
NEW QUESTION 210
About multicast RPF check, which of the following statements is wrong? (Multiple Choice)
- A. Multicast RPF check is not rely on unicast routing.
- B. The router receives the multicast packet but fails the RPF check and discards the received multicast packet.
- C. All multicast protocols use RPF check.
- D. There are two RPF check functions. One is to prevent loops in multicast routes, the other is to prevent forwarding of redundant multicast data packets.
Answer: A,C
NEW QUESTION 211
Which of the following information is carried in the BGP Open message? (Multiple Choice)
- A. Routing properties
- B. BGP ID
- C. Hold time
- D. BGP version
- E. Local Autonomous System (AS) number
Answer: B,C,D,E
NEW QUESTION 212
An access control list (ACL) can be used to match the routing information or the address of a data packet, and can only distinguish between certain types of packets and cannot filter packets.
- A. False
- B. True
Answer: A
NEW QUESTION 213
The OSPF NBMA network type requires that routers in the network must select DR and BDR; otherwise, they can't work.
- A. False
- B. True
Answer: A
NEW QUESTION 214
There is a difference between the RSTP protocol and the STP protocol. When defining the port state in the RSTP protocol, what port states are defined?
- A. Discarding state
- B. Learning state
- C. Discarding state, Learning state and Forwarding state.
- D. Forwarding state
Answer: C
NEW QUESTION 215
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