サンプル問題 1： A network administrator is notified that a user cannot access resources on the network. The network administrator checks the physical connections to the workstation labeled User 3 and sees the Ethernet is properly connected. However, the network interface’s indicator lights are not blinking on either the computer or the switch. Which of the following Is the most likely cause?
A: Theswitch failed.
B: Thedefault gateway is wrong.
C: Theport Is shut down.
D: TheVLAN assignment is incorrect.
正解：C
Explanation: When a network interface's indicator lights are not blinking on either the computer or the switch, it suggests a physical layer issue. Here is the detailed reasoning: Ethernet Properly Connected: The Ethernet cable is correctly connected, eliminating issues related to a loose or faulty cable. No Indicator Lights: The absence of blinking indicator lights on both the computer and the switch typically points to the port being administratively shut down. Switch Port Shut Down: In networking, a switch port can be administratively shut down, disabling it from passing any traffic. This state is configured by network administrators and can be verified and changed using the command-line interface (CLI) of the switch. Command to Check and Enable Port: bash Copy code Switch> enable Switch# configure terminal Switch(config)# interface [interface id] Switch(config-if)# no shutdown The command no shutdown re-enables the interface if it was previously disabled. This will restore the link and the indicator lights should start blinking, showing activity. : Basic Configuration Commands PDF, sections on interface configuration (e.g., shutdown, no shutdown)
サンプル問題 2： An administrator is setting up an SNMP server for use in the enterprise network and needs to create device IDs within a MIB. Which of the following describes the function of a MIB?
A: DHCP relay device
B: Policy enforcement point
C: Definition file for event translation
D: Network access controller
正解：C
Explanation: MIB (Management Information Base): A MIB is a database used for managing the entities in a communication network. The MIB is used by Simple Network Management Protocol (SNMP) to translate events into a readable format, enabling network administrators to manage and monitor network devices effectively. Function of MIB: MIBs contain definitions and information about all objects that can be managed on a network using SNMP. These objects are defined using a hierarchical namespace containing object identifiers (OIDs). : CompTIA Network+ materials discussing SNMP and MIB functionality.
サンプル問題 3： Which of the following best explains the role of confidentiality with regard to data at rest?
A: Datacanbe accessedby anyone on the administrative network.
B: Datacanbe accessedremotely with proper training.
C: Datacanbe accessedafter privileged access Is granted.
D: Datacanbe accessedafter verifying the hash.
正解：C
Explanation: Confidentiality with Data at Rest: Confidentiality is a core principle of data security, ensuring that data stored (at rest) is only accessible to authorized individuals. This protection is achieved through mechanisms such as encryption, access controls, and permissions. Privileged Access: The statement "Data can be accessed after privileged access is granted" aligns with the confidentiality principle, as it restricts data access to users who have been granted specific permissions or roles. Only those with the appropriate credentials or permissions can access the data. Incorrect Options: A. "Data can be accessed by anyone on the administrative network." This violates the principle of confidentiality by allowing unrestricted access. B. "Data can be accessed remotely with proper training." This focuses on remote access rather than restricting access based on privileges. D. "Data can be accessed after verifying the hash." This option relates more to data integrity rather than confidentiality. : CompTIA Network+ materials on data security principles, particularly sections on confidentiality and access control mechanisms.
