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H3C Constructing H3C High-Performance Campus Networks Sample Questions:
1. Mid-to-high-end switch equipment has its own redundancy. If the dual main control board of a core switch in the customer's network is active and standby redundant hot backup, AC power supply 2+1 redundant hot backup, and fan system 1:1 hot backup, Then, among the following operations, which may have a significant impact on the customer network is
A) Pull out 1 fan
B) Pull out the standby main control board
C) Unplug the business board
D) Unplug 2 power supplies
2. In the networking shown in the figure, the router's unicast routing table is as follows:
<H3C>display ip routing-table
Routing Tables: Public
Destinations: 9Routes: 9
Destination/MaskProtoPreCost NextHop Interface
10.1.1.0/30 Direct 0010.1.1.2S0/2/0
10.1.1.1/32 Direct 0010.1.1.1 S0/2/0
10.1.1.2/32 Direct 00127.0.0.1 InLoopO
11.1.1.0/30 Direct 0011.1.1.1 Eth0/110
11.1.1.1/32 Direct 00127.0.0.1 InLoopO
12.1.1.0/30 Direct 0012.1.1.1Eth0/1/1
12.1.1.1/32 Direct 00127.0.0.1 InLoopO
13.1.1.0/30 Direct 0013.1.1.1EthO/1/2
13.1.1.1/32 Direct 00127.0.0.1 InLoopO
100.1.1.0/240SPF 10 1563 10.1.1.1S0/2/0
127.0.0.0/8 Direct 00127.0.0.1 InLoopO
127.0.0.1/32Direct 00127.0.0.1 InLoopO
200.1.1.0/240SPF 10 212.1.1.2Eth0/1/1
Then, the multicast data that the receiver (Receiver) will receive is
A) (100.1.1.1, 226.3.3.3)
B) (100.1.1.1, 226.1.1.1)
C) (200.1.1.1, 226.2.2.2)
3. 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 is the master router of the backup group
B) RTB is the master router of the backup group
C) RTA and RTB are both in VRRP Master state
D) RTA and RTB cannot elect the master router of the backup group
4. As shown in the network, the switch enables RSTP, assuming that the cost of each link is the same, the following statements are correct:
A) If the SWD port EO/1 is down, the SWD port E0/2 will immediately change from the Alternate port to the new root port
B) If there are multiple alternate ports on the SWD, when the root port is down, SWD will select the port with the highest priority from these alternate ports as the new root port
C) After topology convergence, SWD will have one port as an alternate port
D) Assuming that the spanning tree operating mode of SWB and SWC is modified to STP, the Alternate port of SWD can still enter the forwarding state directly after it becomes the new root port
5. The following statements about the PIM SM registration suppression timer are correct (choose one or more)
A) The DR router of the multicast source will maintain a registration suppression timer. If the timer expires, the DR will unicast multicast source registration messages to the RP
B) After receiving the registration stop message, the DR will update the registration suppression timer and continue to send data in multicast mode
C) To prevent the registration suppression timer from expiring, the DR will send the Register message encapsulating the multicast data to the RP before the timer expires
D) After the RP receives the registration message from the DR, it will send a registration stop message and update the local (S, G) and (*, G) entries
Solutions:
| Question # 1 Answer: C,D | Question # 2 Answer: B,C | Question # 3 Answer: B | Question # 4 Answer: B,C | Question # 5 Answer: A,B |

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