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問題 #557
A network engineer wants to implement a new IDS between the switch and a router connected to the LAN.
The engineer does not want to introduce any latency by placing the IDS in line with the gateway. The engineer does want to ensure that the IDS sees all packets without any loss. Which of the following is the best way for the engineer to implement the IDS?
答案：B
解題說明：
Reference: CompTIA Network+ Certification Exam Objectives - Network Security section.
問題 #558
Company C is acquiring Company A and Company B. Company C needs to merge all three networks into one Class B network. Additionally, the network capacity of each company needs to grow by 20%. Company C also requires segmentation of Company A and Company B to account for unknown security vulnerabilities within each.
Instructions:
Select the correct subnet range to meet Company C ' s requirements.
答案：
解題說明：
Explanation:
A = 192.168.10.0/26
B = 192.168.1.0/23
C = 10.0.0.1/18
Using the choices shown in the screenshot, the best-fit subnet selections are based on host growth requirements first, then segmentation .
For Company A , the current device count is 32 . With 20% growth , that becomes about 39 devices . A /27 only supports 30 usable hosts , so it is too small. A /26 supports 62 usable hosts , so 192.168.10.0/26 is the correct choice.
For Company B , the current device count is 100 . With 20% growth , that becomes 120 devices . The smallest correct subnet would normally be a /25 with 126 usable hosts , but that option is not shown. From the available choices, 192.168.1.0/23 is the smallest subnet that still supports more than 120 hosts, so that is the best answer.
For Company C , the current device count is 10,000 . With 20% growth , it needs space for 12,000 hosts . A
/18 provides 16,382 usable hosts , while a /19 is not available and a /21 or /22 would be far too small.
Therefore, 10.0.0.1/18 is the correct selection.
One important note: the dropdown choices shown do not actually let all three companies be placed into a single true Class B network block. So these answers are the best valid selections from the provided options .
問題 #559
Which of the following standards enables the use of an enterprise authentication for network access control?
答案：D
解題說明：
Comprehensive and Detailed Explanation (aligned to N10-009):
802.1X provides port-based Network Access Control (NAC), requiring authentication (often through RADIUS) before granting access. This is the standard for enterprise authentication on both wired and wireless networks.
A . 802.1Q defines VLAN trunking.
C . 802.3bt defines higher-power PoE.
D . 802.11h deals with spectrum management in wireless.
Reference (CompTIA Network+ N10-009):
問題 #560
A network administrator needs to connect a department to a new network segment. They need to use a DHCP server located on another network. Which of the following can the administrator use to complete this task?
答案：A
解題說明：
Comprehensive and Detailed In-Depth Explanation:
An IP Helper (IP Helper Address) allows DHCP requests to pass through routers and reach a DHCP server on another network.
* DHCP broadcasts are not forwarded across routers by default, so an IP Helper Address is needed to relay the request.
* This is crucial for large networks where a single DHCP server serves multiple subnets.
* Option B (Reservation): Ensures a specific IP address is assigned to a MAC address but does not relay DHCP across networks.
* Option C (Exclusion): Prevents specific IP addresses from being assigned, but does not help with DHCP relay.
* Option D (Scope): Defines the range of IP addresses available for DHCP clients but does not assist in cross-network communication.
? Reference: CompTIA Network+ (N10-009) Official Study Guide - Section: DHCP and IP Addressing
問題 #561
You have been tasked with implementing an ACL on the router that will:
1. Permit the most commonly used secure remote access technologies from the management network to all other local network segments
2. Ensure the user subnet cannot use the most commonly used remote access technologies in the Linux and Windows Server segments.
3. Prohibit any traffic that has not been specifically allowed.
INSTRUCTIONS
Use the drop-downs to complete the ACL
If at any time you would like to bring back the initial state of the simulation, please click the Reset All button.
答案：
解題說明：
See the answer and solution below.
問題 #562
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