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質問 1：
Which of the following statements regarding IP address allocation are true? (Multiple Choice)
A. All IP addresses on a network must be unique except when anycast is used.
B. The mask length of /24 can simplify network design.
C. Variable length subnet mask (VLSM) is often used for determining mask lengths to improve IP address efficiency.
D. IPv4 addresses are classified into Classes A, B, and C.
正解：A,C
質問 2：
Which of the following statements regarding the operation window time for a software upgrade is false?
A. It is determined by the accepted service interruption duration.
B. Only network maintenance personnel need to be notified of the operation window time, while the customer does not.
C. It must be longer than the upgrade execution time.
D. Troubleshooting time must be reserved.
正解：B
質問 3：
Customer network information and service composition are business secrets of customers and cannot be leaked, obtained without authorization, or sold for operation.
A. TRUE
B. FALSE
正解：A
質問 4：
Which of the following troubleshooting methods is not based on the TCPAP reference model?
A. Bottom-up
B. Configuration comparison
C. Top-down
D. Replacement
正解：B
質問 5：
Which of the following are sources of network optimization requirements? (Multiple Choice)
A. For enterprise information security, deploy new security devices.
B. Replace severely aged signal cables in an ELV well.
C. As the videoconferencing service is required on the network, add switching devices that support Layer 2 multicast.
D. After long-term network maintenance, propose suggestions and improvements for centralized rectification.
正解：A,B,C,D
質問 6：
DHCP snooping is a valid security mechanism.
Which of the following attack prevention methods can DHCP snooping provide? (Multiple Choice)
A. Source MAC address check for data packets in collaboration with DAI
B. Defense against DOS attacks on the DHCP server
C. Defense against bogus DHCP server attacks
D. Source IP address check for data packets in collaboration with IPSG
E. Defense against MAC address flooding attacks
正解：B,C,D
質問 7：
In a complex network environment, the unstructured network troubleshooting process may result in a new fault, making network troubleshooting more difficult.
A. TRUE
B. FALSE
正解：A
質問 8：
A user reported a failure to receive emails through the email client.
Which of the following are possible causes? (Multiple Choice)
A. The user does not have the required rights,
B. The client settings are incorrect.
C. The link is faulty.
D. The email server is faulty.
正解：A,B,C,D
質問 9：
Which of the following work is not performed in network optimization?
A. Network expansion
B. Hardware optimization
C. Software optimization
D. Air conditioner replacement in the equipment room
正解：D
Which of the following statements regarding IP address allocation are true? (Multiple Choice)
A. All IP addresses on a network must be unique except when anycast is used.
B. The mask length of /24 can simplify network design.
C. Variable length subnet mask (VLSM) is often used for determining mask lengths to improve IP address efficiency.
D. IPv4 addresses are classified into Classes A, B, and C.
正解：A,C
質問 2：
Which of the following statements regarding the operation window time for a software upgrade is false?
A. It is determined by the accepted service interruption duration.
B. Only network maintenance personnel need to be notified of the operation window time, while the customer does not.
C. It must be longer than the upgrade execution time.
D. Troubleshooting time must be reserved.
正解：B
質問 3：
Customer network information and service composition are business secrets of customers and cannot be leaked, obtained without authorization, or sold for operation.
A. TRUE
B. FALSE
正解：A
質問 4：
Which of the following troubleshooting methods is not based on the TCPAP reference model?
A. Bottom-up
B. Configuration comparison
C. Top-down
D. Replacement
正解：B
質問 5：
Which of the following are sources of network optimization requirements? (Multiple Choice)
A. For enterprise information security, deploy new security devices.
B. Replace severely aged signal cables in an ELV well.
C. As the videoconferencing service is required on the network, add switching devices that support Layer 2 multicast.
D. After long-term network maintenance, propose suggestions and improvements for centralized rectification.
正解：A,B,C,D
質問 6：
DHCP snooping is a valid security mechanism.
Which of the following attack prevention methods can DHCP snooping provide? (Multiple Choice)
A. Source MAC address check for data packets in collaboration with DAI
B. Defense against DOS attacks on the DHCP server
C. Defense against bogus DHCP server attacks
D. Source IP address check for data packets in collaboration with IPSG
E. Defense against MAC address flooding attacks
正解：B,C,D
質問 7：
In a complex network environment, the unstructured network troubleshooting process may result in a new fault, making network troubleshooting more difficult.
A. TRUE
B. FALSE
正解：A
質問 8：
A user reported a failure to receive emails through the email client.
Which of the following are possible causes? (Multiple Choice)
A. The user does not have the required rights,
B. The client settings are incorrect.
C. The link is faulty.
D. The email server is faulty.
正解：A,B,C,D
質問 9：
Which of the following work is not performed in network optimization?
A. Network expansion
B. Hardware optimization
C. Software optimization
D. Air conditioner replacement in the equipment room
正解：D
Tatsuta -
本日H12-223-ENU試験を受験したところ、見事で合格しました。
ひたすらソフト版を利用して暗記しました。ほぼ的中されました。
よかったです。