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NEW QUESTION 158
The three routers RTA, RTB, and RTC are connected together via a LAN to form a VRRP backup group. The interface configuration of each router is as follows:
RTA's GigabitEthernet ip address 192.168.0.252 255.255.255.0 vrrp vrid 1 virtual-ip 192.168.0.254 vrrp vrid 1 priority 120 RTB's GigabitEthernet ip address 192.168.0.253 255.255.255.0 vrrp vrid 1 virtual-ip 192.168.0.254 vrrp vrid 1 priority 90 RTC's GigabitEthernet ip address 192.168.0.254 255.255.255.0 vrrp vrid 1 virtual-ip 192.168.0.254
It can be known from the above information
- A. RTB is the master router of the backup group
- B. RTA is the master router of the backup group
- C. After RTA is sent, RTB is the master router of the backup group
- D. RTC is the master router of the backup group
Answer: D
NEW QUESTION 159
Among the following PIMV2 messages, the destination address is a unicast address:
- A. Register
- B. Prune
- C. Assert
- D. Graft
- E. Join
- F. Hello
Answer: A,D
NEW QUESTION 160
The IP address of the host PCA is 40.1.1.1, the MAC address is 0011.1111.1111, and it is connected to the GigabitEthernet1/0/1 port of the switch SWA. The following commands are configured on the switch SWA:
[SWA]vlan 10
[SWA-vlan10]quit
[SWA]vlan 20
[SWA-vlan20]protocol-vlan ipv4
[SWA-vlan20]quit
[SWA]vlan 30
[SWA-vlan30]quit
[SWA]mac-vlan mac-address 0011-1111-1111 vlan 30
[SWA]vlan 40
[SWA-vlan40]ip-subnet-vlan ip 50.1.1.0 255.255.255.0
[SWA-vlan40]quit
[SWA]interface GigabitEthernet 1/0/1
[SWA-GigabitEthernet1/0/1]port link-type hybrid
[SWA-GigabitEthernet1/0/1]port hybrid pvid vlan 10
[SWA-GigabitEthernet1/0/1]port hybrid vlan 10 20 30 40 untagged
[SWA-GigabitEthernet1/0/1]port hybrid protocol-vlan vlan 20 0
[SWA-GigabitEthernet1/0/1]port hybrid ip-subnet-vlan vlan 40
[SWA-GigabitEthernet1/0/1]mac-vlan enable
[SWA-GigabitEthernet1/0/1]vlan precedence ip-subnet-vlan
After the configuration is complete, it can be judged that PCA will join
- A. VLAN30
- B. VLAN 10
- C. VLAN40
- D. VLAN20
Answer: A
NEW QUESTION 161
Regarding the multicast distribution tree model SPT, the correct statement below is ______.
- A. Different multicast sources take themselves as the root and establish SPT independently
- B. Each router on the SPT will maintain (S, G) entries
- C. In the SPT model, the path taken by the multicast source to reach any receiver is optimal
- D. Each router on the SPT will maintain (*, G) entries
Answer: A,B,C
NEW QUESTION 162
Regarding the MSTP calculation process, the correct statement is
- A. The Alternate port and Backup port on the CST must be domain boundary ports and must not be in the MST domain
- B. When calculating CST, the external path cost will be given priority, and the internal path cost will be compared only when the external path cost is the same
- C. In MSTP, since the ports at both ends of the link may be designated ports in different instances, the ports at both ends of the link may both receive and send MST BPDUs at the same time
- D. The calculation process of MSTP is to first calculate CST and IST through MSTBPDU, and then the switches in the domain send MSTI BPDU to calculate the spanning tree of each instance
Answer: A,C
NEW QUESTION 163
In the network as shown in the figure, the interconnection lines between RT1, RT2, RT3, RT4 and RT5 are all Gigabit Ethernet cables, running OSPF, and after publishing the corresponding network segments to achieve routing interoperability, the routers all run the PIM SM protocol. RP is 1.1.1.1 RT4 is connected to the receiver, and IGMP is enabled on the corresponding interface. After the initial multicast traffic forwarded along the RPT is switched to SPT, which of the following routers constitutes SPT
- A. RT5
- B. RT1
- C. RT3
- D. RT2
- E. RT4
Answer: B,C,D,E
NEW QUESTION 164
In the switching network as shown in the figure, all three switches have only default VLAN1, the interconnection ports of the three switches are Trunk, and all VLANs are allowed to pass, and the three switches have the global and port GVRP function enabled. VLAN 10 is created on the switch SWA, VLAN 20 is created on the switch SWC, and the GVRP registration mode of the Ethernet1/0/1 port is set to Forbidden on the switch SWA, and the display vlan command is executed on the SWB to view the VLAN existing on VL^SWB Yes (choose one or more)
- A. VLAN20
- B. VLAN 10
- C. VLAN1
Answer: A,C
NEW QUESTION 165
The customer's two routers are connected together through a LAN, and the two routers form a VRRP backup group and the related configuration is as follows:
[RTA-GigabitEthernet1 /0]display this
ip address 192.168.0.252 255.255.255.0
vrrp vrid 1 virtual-ip 192.168.0.254
vrrp vrid 1 priority 120
[RTB-GigabitEthernet1/0]display this
ip address 192.168.0.253 255.255.255.0
vrrp vrid 1 virtual-ip 192.168.0.254
RTA router GigabitEthernet1/0 interface MAC is 000f-4300-0001, RTB router GigabitEthernet1/0 interface MAC is 000f-4300-0002 If RTA adopts aggregation group Real-mac mode, RTB adopts aggregation group virtual-mac mode, from the above information Learned
- A. The gateway MAC received by the LAN PC is 0000-5e00-0101
- B. RTA and RTB cannot establish VRRP group
- C. The gateway MAC received by the LAN PC is 000f-4300-0001
- D. If the gateway MAC received by the LAN PC is 0000-5e00-0101, the router RTB is in the VRRP Master state
Answer: C,D
NEW QUESTION 166
Which of the following statements about SOA and ITolP are correct?
- A. SOA is based on the network, eliminates the information gap caused by heterogeneous systems, integrates various services such as storage, security, and multimedia, and realizes the componentization and resourceization of IT infrastructure
- B. ITolP solution embodies the core idea of SOA
- C. SOA solutions require the integration of IT infrastructure and the establishment of a unified IT infrastructure platform based on network technology
- D. ITolP allows flexible, fast and efficient construction of enterprise intelligent applications, and can quickly adapt to changes in enterprise business processes
Answer: B,D
NEW QUESTION 167
Which of the following statements about multicast VLAN is correct is
- A. The sub-VLANs of the multicast VLAN must also enable the IGMP-Snooping function
- B. Multicast VLAN not only saves bandwidth, but also reduces the burden on Layer 3 devices
- C. The VLAN that the host belongs to needs to be configured as a sub-VLAN of the multicast VLAN
- D. Multicast VLAN needs to enable IGMP-Snooping function
Answer: B,C,D
NEW QUESTION 168
After executing the displayinterface Ethernet 1/0/1 command on the switch SWA, the output information is as follows:
[SWA]display interface Ethernet 1/0/1
Ethernetl/0/1 current state: UP
PVID: 10
Mdi type: auto
Link delay is 0(sec)
Port link-type: trunk
VLAN passing: 1 (default vlan), 10
VLAN permitted: 1 (default vlan), 2-4094
Trunk port encapsulation: IEEE 802.1q
Port priority: 0
It can be judged from the above output
- A. Data frames with VLAN10 tags will not be discarded when entering port Ethernet1/0/1
- B. Data frames with VLAN20 tags can be forwarded from port Ethernet1/0/1
- C. Port Ethernet1/0/1 is a Trunk port, allowing all VLAN data to pass through
- D. Data frames with VLAN1 tags will be stripped of tags when they leave port Ethernet1/0/1
Answer: A,C
NEW QUESTION 169
Regarding the rapid switching mechanism of designated ports in RSTP, what are the correct statements?
- A. When the designated port in RSTP is in Discarding state, RSTBPDU with Proposal set to be sent
- B. The purpose of the synchronization process is to eliminate the possibility of loops locally on the bridge, and all designated ports need to be blocked during the synchronization process
- C. The designated port receives the RST BPDU with the Proposal bit set, and the disadvantage is that this port is a follower port, the port will send the RST BPDU with the Agreement bit set
- D. The designated port fast switching mechanism must be on the point-to-point link
Answer: A,C,D
NEW QUESTION 170
In the switching network as shown in the figure, set VLAN10 to Isolate-userW, VLAN2 and VLAN3 to the Secondary VLAN of VLAN 10 on the switch SWA; create VLAN2 VLAN20 on the switch SWB, and set VLAN20 to Isolate-user-vlan, and VLAN4 to After setting the IP address of each device according to the secondary VLA of VLAN20 as shown in the figure, check the MAC address table on SWA, and you can judge that PCA belongs to _ (choose two or more)
- A. VLAN1
- B. VLAN10
- C. VLAN3
- D. VLAN20
- E. VLAN2
- F. VLAN4
Answer: B,E
NEW QUESTION 171
The two routers are connected through a LAN to form a VRRP backup group, and the configuration on each interface is as follows:
[RTA-GigabitEthernet1/0]display this
ip address 192.168.0.252 255.255.255.0
vrrp vrid 1 virtual-ip 192.168.0.254
[RTB-GigabitEthernet1/0]display this
ip address 192.168.0.253 255.255.255.0
vrrp vrid 1 virtual-ip 192.168.0.254
It can be known from the above information
- A. RTA and RTB are both in VRRP Master state
- B. RTB is the master router of the backup group
- C. RTA is the master router of the backup group
- D. RTA and RTB cannot elect the master router of the backup group
Answer: B
NEW QUESTION 172
In the PIM-DM network as shown in the figure, part of the unicast routing table of routers RT1 and RT2 is as follows:
<RT1>display ip routing-table
Routing Tables: Public
Destination/MaskProtoPreCost NextHop Interface
1.1.1.0/24xxxxP1-1 C1-110.1.1.1POI11
1.1.0.0/16xxxxP1-2 C1-210.1.1.1Port1
<RT2>display ip routing-table
Routing Tables: Public
- A. If P1-1> P2-2,
- B. If P1-1 = P2-2,
- C. If P1-2 = P2-2,
- D. If P1-1= P2-2,
- E. If P1-2>P2-2,
- F. If P1-2 = P2-2,
Answer: B
NEW QUESTION 173
Multicast applications are based on UDP, so multicast applications have the following shortcomings
- A. Do your best to deliver, cannot guarantee low-latency application requirements
- B. No congestion control
- C. Repeated data packet reception
- D. The problem of out-of-sequence arrival of multicast packets can be corrected
Answer: A,B,C
NEW QUESTION 174
In the networking shown in the figure, the PIMSM protocol runs between RT1, RT2 and RT3, the RP is 1.1.1.1 RT3 is connected to the receiver, and IGMP is enabled on the corresponding interface, and the multicast source 2.2.2.2 is connected to View the unicast routing table on RT3 on RT2 as follows:
[RT3]display ip routing-table
Routing Tables: Public
Destinations: 11 Routes: 12
Destination/MaskProtoPreCost NextHop Interface
1.1.1.1/320SPF 10 1562 192.168.0.1 S0/2/0
2.2.2.2/320SPF 10 1562 192.168.2.1 so/2/1
127.0.0.0/8 Direct 00127.0.0.1 InLoopO
127.0.0.1/32Direct 00127.0.0.1 InLoopO
192.168.0.0/30Direct 00192.168.0.2 S0/2/0
192.168.0.1/32Direct 00192.168.0.1 S0/2/0
192.168.0.2/32Direct 00127.0.0.1 InLoopO
192.168.1.0/300SPF 10 3124 192.168.2.1 so/2/1
OSPF 10 3124 192.168.0.1 S0/2/0
192.168.2.0/30Direct 00192.168.2.2 so/2/1
192.168.2.1/32Direct 00192.168.2.1 so/2/1
192.168.2.2/32Direct 00127.0.0.1 InLoopO
Then, when the receiver (Receiver) sends a group join request, which of the following routers have (*, G) entries
- A. RT1
- B. RT3
- C. RT2
Answer: A,B
NEW QUESTION 175
The customer local area network switch SVVA is connected to multiple switches. If it is known that Monitor Link M is configured on the SWA, the switch SWA has the following configuration information:
[SWA]monitor-link group 1
[SWA-mtlk-group1] port gigabitethernet 1/0/1 uplink
[SWA-mtlk-group1] port gigabitethernet 1/0/2 uplink
[SWA-mtlk-group1] port gigabitethernet 1/0/3 uplink
[SWA-mtlk-group1] port gigabitethernet 2/0/1 downlink
It can be known from the above information
- A. GigabitEthernet1/0/2 port is in Down state, then Gigabitethernet 2/0/1 port will also be in Down state
- B. GigabitEthernet1/0/1 port is Up, then GigabitEthernet 2/0/1 port will also be Up
- C. GigabitEthernet1/0/2 port is in Down state, then GigabitEthernet 2/0/1 port will also be in Down state
- D. GigabitEthernet1/0/1 port is in Down state, then Gigabitethernet 2/0/1 port will also be in Down state
Answer: B
NEW QUESTION 176
Regarding the generation of TCNBPDU, the following statements are correct
- A. If the designated port link of a switch in the network is broken, the switch must generate TCNBPDU
- B. If the alternate port of a switch in the network is down, the switch will not generate TCN BPDUs
- C. STP-enabled non-root bridge switch If a port is connected to a PC, when the port enters the Forwarding switch, it will not produce TCN BPDU
- D. When a port of the switch is selected as the designated port or root port, the switch will immediately send TCNBPDU
Answer: B
NEW QUESTION 177
Regarding the spanning tree port overhead configuration of H3C switches, the following statements are correct:
- A. By default, the larger the port cost, the smaller the port bandwidth
- B. If switches of different manufacturers are interconnected, each switch should be configured to follow the same port cost standard as much as possible, otherwise it may cause the spanning tree calculation result to deviate from the original intention of the network design
- C. H3C switches support three port cost standards, dot1d-1998, dot11, and legacy. The port cost standards to be followed can be switched through the command stp pathcost-standard
- D. The default spanning tree port cost standard for H3C switches is legacy
Answer: A,B,C,D
NEW QUESTION 178
Regarding the comparison of the calculation convergence of RSTP and STP, the correct statement is
- A. Compared with STP, RSTP defines a fast root port switching mechanism^ This can make Alternate quickly become a new root port
- B. Compared with STP, RSTP defines the designated port fast switching mechanism, which can make the designated port quickly enter the forwarding state without waiting for twice the Forward Delay time
- C. Compared with STP, RSTP defines the edge port, which can make the port connected to the i machine quickly enter the forwarding state
- D. If STP wants to shorten the convergence time, you can only configure a smaller ForwardDelay time, but it may affect the stability of the network
Answer: A,B,C,D
NEW QUESTION 179
When the router receives the multicast data, it searches the multicast forwarding table
- A. If there is a corresponding (S, G) entry in the multicast forwarding table, and the interface actually reached by the packet matches the inbound interface in the entry, the router forwards the multicast data
- B. If the multicast data RPF interface does not match the inbound interface in the (S, G) entry, the router will update the inbound interface of the entry to the checked RPF
- C. If the corresponding (S, G) entry does not exist in the multicast forwarding table, the router discards the multicast data
- D. If there is a corresponding (S, G) entry in the multicast forwarding table, but the interface that the packet actually reaches does not match the inbound interface in the entry, the router discards the multicast data
Answer: A,B
NEW QUESTION 180
In the networking shown in the figure, the interconnection lines between RT1, RT2, RT3 and RT4 are all 1000Mbps links except for the 10Mbps link sharing the Ethernet part, and the four routers run OSPF protocol to make the routing interoperable. The PIMSM protocol is running between them, and the RP is 1.1.1.1. There are receivers on the downstream interfaces of RT1 and RT2, and IGMP is enabled on the corresponding interfaces. Then, when the receiver (Received) sends a group join request, which of the following routers exist (*, G) table entry
- A. RT1
- B. RT3
- C. RT2
- D. RT4
Answer: A,B,C,D
NEW QUESTION 181
Regarding the compatibility configuration of MSTP, there are correct statements
- A. When switches from different vendors are interoperable with MSTP, as long as the domain name, revision level, and VLAN instance mapping relationship configuration are exactly the same, you can ensure that the switches belong to the same MST domain
- B. Due to the different keys of different vendors, even if the VLAN instance mapping relationship is the same, different summary results may be obtained
- C. When digest snooping is configured, the H3C switch will use the same hash algorithm and key as the peer vendor when performing digest calculation
- D. H3C switches can realize MSTP intercommunication with switches of other manufacturers through configuration summary snooping,
Answer: B,D
NEW QUESTION 182
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