Huawei H12-261-ENU 問題集

質問 1：
By default, the switch configures the MAC address table to be empty. Host A connected to the switch sends the first unicast data frame. What operation will the switch perform after receiving the data frame?
A. The switch will discard the data frame
B. The switch caches the data frame and waits for the destination host to send the data frame and then forward it.
C. The switch forwards the data frame out of an interface according to the destination MAC address of the data frame.
D. The switch records the source MAC address of the data frame and floods the data frame.
正解：D

質問 2：
In a shared network, what mechanism does PIM-SM use to prevent duplicate traffic?
A. Assert mechanism
B. Register mechanism
C. BSR/RP mechanism
D. Join/Prune mechanism
正解：A

質問 3：
The configuration of two routers in a company is as follows. which of the following statement about the R1 routing table is correct?

A. If the priority of the R1 ISIS protocol is adjusted to 5, the P route entry with the destination network segment of 10.0.2.2/32 on R1 is generated by ISIS.
B. If the priority of the ISIS protocol of R1 is adjusted to 5, the P route entry with the destination network segment of R1 on 10.6.2.2/32 is generated by OSPF.
C. Only if the priority of the R2 ISIS protocol is adjusted to 5, the P route entry with the destination network segment of 10.1.2.2/32 on R1 will be generated by OSPF.
D. If the priority of the R2 ISIS protocol is adjusted to 5, the P route entry with the destination network segment of 10.1.2.2/32 on R1 is generated by ISIS.
正解：A

質問 4：
Which of the following descriptions about the FTP protocol is correct?
A. FTP always uses a TCP session to transmit control information and data information.
B. In FTP Active mode, the server uses the command "PORT to tell the client which port it expects to send data.
C. FTP always uses TCP port 21 to establish a data session and TCP port 20 to establish a control session.
D. In FTP Passive mode, the client completes the initialization of the TCP session for control and data.
E. FTP always uses TCP port 20 to establish a data session and ICP port 21 to establish a control session.
正解：D

質問 5：
When judging the old and new LSA, the serial number parameter and the age parameter will be used. Which of the following statements about the two parameters is correct?
A. When the router receives an LSA age is 360s, the LSA is unavailable.
B. If the serial number of the LSA reaches the end value of 0x7FFF, the current router advertises the age is lsa of 3600s.
C. When the router receives two LSAs, the serial number is the same, the checksum is the same, and the smaller the age, the better.
D. Both the serial number and the age parameter can judge the LSA is old or new, and the router preferentially compares the sequence parameters, the larger the better.
正解：D

質問 6：
If a Huawei switch runs the RSTP protocol, when will the BPDU on a port of the switch be aged?
A. On the interface, RSTP does not age BPDUs.
B. After more than 6 seconds
C. After MaxAge times out
D. After the Forward Delay expires
E. After the Hold time expires
正解：E

質問 7：
ISIS will elect DIS in the broadcast multi-access network. Which of the following statement about DIS is correct? (Multiple Choice)
A. DIS supports the preemption function. After the new DIS preemption is successful, it does not need to flood any LSPs.
B. In a broadcast multi-access network, the DIS sends Hello PDUs three times as often.
C. DIS guarantees database synchronization by periodically sending CSNP messages
D. ISIS elects the DIS by comparing the priorities, and compares the MAC addresses if the priorities are the same.
正解：B,C,D

質問 8：
Huawei's two switches, SWA and SWB, are connected through seven Ethernet ports and are configured with static link aggregation. The corresponding ports on the switch SW are Ethernet 1/0/2, Ethernet 1/0/3, Ethernet 1/0/4, and Ethernet 1/0/5, Ethernet 1/0/6, and Ethernet 1/0/7. The configuration mode is configured in the order of the ports. If the switch SWA and SWB support only 6 ports in each aggregation group.
A. In the case that the configurations of the ports are the same, the SWA randomly selects one of the seven ports as the aggregation group Unselected port.
B. Ethernet1/0/1 Unselected port when the configurations of the ports are the same
C. Ethernet1/0/7 Unselected port with consistent port configuration
D. Ethernet1/0/6 Unselected port with consistent port configuration
正解：C

質問 9：
As shown in the following topology diagram, all the interfaces of the router in the figure are all enabled with the ISIS protocol. The correct statements of the following are: (Multiple Choice)

A. If the Ethernet 0/0/0 interface of R1 is down, then R2 will become the master device.
B. If the GE0/0/0 interface of R3 is down, then R2 will become the master device.
C. If the Ethernet 0/0/1 interface of R1 is down, then R2 will become the master device.
D. If the Ethernet 0/0/0 interface of R3 is down, then R2 will become the master device.
正解：A,B,C