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質問 # 501
Which of the following types of attacks is most likely to occur after an attacker sets up an evil twin?
正解：A
解説：
An evil twin is a malicious wireless access point that impersonates a legitimate SSID. Once victims connect, the attacker can intercept and manipulate traffic, performing an on-path (man-in- the- middle) attack--capturing credentials, injecting content, or downgrading encryption.
質問 # 502
A network administrator needs to establish a tunnel that can:
* Authenticate packet headers.
* Exchange encryption keys over the network.
* Transmit encrypted payloads.
Which of the following technologies should the administrator choose?
正解：A
解説：
The best answer is A. IPSec. The question describes a complete secure tunneling solution that can authenticate traffic, support encrypted payload delivery, and use key exchange mechanisms. IPSec is the suite of protocols designed for exactly that purpose. It can use AH for header authentication, ESP for payload encryption, and key exchange methods such as IKE to negotiate security associations and encryption keys.
The reason the other options are not correct is that they only represent parts of the larger solution or do not provide security by themselves. ESP handles encryption and can also provide integrity features, but it is not the full framework for secure tunneling on its own. AH provides authentication and integrity for packet headers, but it does not encrypt the payload. GRE creates tunnels but does not provide native encryption or strong authentication by itself.
For Network+ study purposes, when a question combines authentication, encryption, and secure key exchange in one scenario, the broader technology being tested is IPSec. It is widely used for site-to-site VPNs and remote-access VPNs because it provides confidentiality, integrity, and secure tunnel establishment. That makes A the correct answer.
質問 # 503
A network technician replaced an access layer switch and needs to reconfigure it to allow the connected devices to connect to the correct networks.
INSTRUCTIONS
Click on the appropriate port(s) on Switch 1 and Switch 3 to verify or reconfigure the correct settings:
Ensure each device accesses only its
correctly associated network.
Disable all unused switchports.
. Require fault-tolerant connections
between the switches.
. Only make necessary changes to
complete the above requirements.
正解：
解説：
See the solution below in Explanation.
Explanation:
To provide a complete solution for configuring the access layer switches, let ' s proceed with the following steps:
Identify the correct VLANs for each device and port.
Enable necessary ports and disable unused ports.
Configure fault-tolerant connections between the switches.
Port 1 Configuration (Uplink to Core Switch)
Status: Enabled
LACP: Enabled
Speed: 1000
Duplex: Full
VLAN Configuration: Tagged for VLAN60, VLAN90, VLAN120, VLAN150, VLAN220 Port 2 Configuration (Uplink to Core Switch) Status: Enabled LACP: Enabled Speed: 1000 Duplex: Full VLAN Configuration: Tagged for VLAN60, VLAN90, VLAN120, VLAN150, VLAN220 Port 3 Configuration (Server Connection) Status: Enabled LACP: Disabled Speed: 1000 Duplex: Full VLAN Configuration: Untagged for VLAN90 (Servers) Port 4 Configuration (Server Connection) Status: Enabled LACP: Disabled Speed: 1000 Duplex: Full VLAN Configuration: Untagged for VLAN90 (Servers) Port 5 Configuration (Wired Users and WLAN) Status: Enabled LACP: Enabled Speed: 1000 Duplex: Full VLAN Configuration: Tagged for VLAN60, VLAN120, VLAN150 Port 6 Configuration (Wired Users and WLAN) Status: Enabled LACP: Enabled Speed: 1000 Duplex: Full VLAN Configuration: Tagged for VLAN60, VLAN120, VLAN150 Port 7 Configuration (Voice and Wired Users) Status: Enabled LACP: Enabled Speed: 1000 Duplex: Full VLAN Configuration: Tagged for VLAN60, VLAN90, VLAN120, VLAN220 Port 8 Configuration (Voice, Printers, and Wired Users) Status: Enabled LACP: Enabled Speed: 1000 Duplex: Full VLAN Configuration: Tagged for VLAN60, VLAN90, VLAN120, VLAN220 Port 1 Configuration (Unused) Status: Disabled LACP: Disabled Port 2 Configuration (Unused) Status: Disabled LACP: Disabled Port 3 Configuration (Connection to Device) Status: Enabled LACP: Disabled Speed: 1000 Duplex: Full VLAN Configuration: Untagged for VLAN1 (Default) Port 4 Configuration (Connection to Device) Status: Enabled LACP: Disabled Speed: 1000 Duplex: Full VLAN Configuration: Untagged for VLAN1 (Default) Port 5 Configuration (Connection to Device) Status: Enabled LACP: Disabled Speed: 1000 Duplex: Full VLAN Configuration: Untagged for VLAN1 (Default) Port 6 Configuration (Connection to Device) Status: Enabled LACP: Disabled Speed: 1000 Duplex: Full VLAN Configuration: Untagged for VLAN1 (Default) Port 7 Configuration (Connection to Device) Status: Enabled LACP: Disabled Speed: 1000 Duplex: Full VLAN Configuration: Untagged for VLAN1 (Default) Ports 1 and 2 on Switch 1 are configured as trunk ports with VLAN tagging enabled for all necessary VLANs.
Ports 3 and 4 on Switch 1 are configured for server connections with VLAN 90 untagged.
Ports 5, 6, 7, and 8 on Switch 1 are configured for devices needing access to multiple VLANs.
Unused ports on Switch 3 are disabled.
Ports 3, 4, 5, 6, and 7 on Switch 3 are enabled for default VLAN1.
Core Switch Ports should be configured as needed for uplinks to Switch 1.
Ensure LACP is enabled for redundancy on trunk ports between switches.
By following these configurations, each device will access only its correctly associated network, unused switch ports will be disabled, and fault-tolerant connections will be established between the switches.
質問 # 504
A network engineer must determine which ports are currently established from a client device.
Given the following:
Which of the following commands was used to produce the output?
正解：B
解説：
The output shows active TCP connections with local and foreign addresses along with connection states such as ESTABLISHED and TIME_WAIT, which is characteristic of the netstat command used to display current network connections and port usage.
質問 # 505
Which of the following is a network topology that uses a point-to-point connection between two nodes without the use of a centralized access point?
正解：C
解説：
An ad hoc topology creates a direct, point-to-point wireless connection between two devices without requiring any central access point or infrastructure.
質問 # 506
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P.S.Tech4ExamがGoogle Driveで共有している無料の2026 CompTIA N10-009ダンプ：https://drive.google.com/open?id=1RuERtBymySbS-nxEf1RuApQqDGoEDkJK