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| Section | Objectives |
|---|---|
| Topic 1: Network Security | - Security concepts and threats - Network hardening techniques - Access control and authentication |
| Topic 2: Network Operations | - Network documentation and diagrams - Monitoring and optimization - Business continuity and disaster recovery |
| Topic 3: Network Troubleshooting | - Tools and diagnostic techniques - Common network issues - Troubleshooting methodology |
| Topic 4: Network Implementation | - Network storage and virtualization - Switching technologies - Routing technologies - Wireless networking |
| Topic 5: Networking Concepts | - OSI model and TCP/IP model - Ports, protocols, and services - Network topologies and types (LAN, WAN, WLAN) - IPv4 and IPv6 addressing |
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질문 # 341
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.
정답：
설명：
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.
질문 # 342
Which of the following describes limiting access to tools or facilities based on job role?
정답：C
설명：
Limiting access based on job role aligns with the principle of least privilege, which ensures users receive only the access necessary to perform their duties.
질문 # 343
A network administrator needs to set up a multicast network for audio and video broadcasting.
Which of the following networks would be the most appropriate for this application?
정답：C
설명：
The address range 224.0.0.0/24 falls within the Class D IP address range (224.0.0.0 to
239.255.255.255), which is reserved for multicast traffic. Multicast addresses are used for the delivery of information to multiple destinations simultaneously, making them ideal for applications like audio and video broadcasting. The other options (172.16.0.0/24, 192.168.0.0/24, and
240.0.0.0/24) are not suitable for multicast as they are within different IP ranges used for other purposes (private addressing and future use, respectively).
질문 # 344
A user reports having intermittent connectivity issues to the company network. The network configuration for the user reveals the following:
IP address: 192.168.1.10
Subnet mask: 255.255.255.0
Default gateway: 192.168.1.254
The network switch shows the following ARP table:
Which of the following is the most likely cause of the user's connection issues?
정답：C
설명：
This scenario describes a duplicate IP address. The ARP table shows two different MAC addresses (0c00.
1134.0001 and 0c00.1298.d239) associated with the same IP address (192.168.1.10), which leads to ARP table conflicts and intermittent connectivity.
From Andrew Ramdayal's guide:
"Duplicate IP addresses occur when two devices on the same network are assigned the same IP address, causing network conflicts. Common issues include manual configuration errors or DHCP lease issues.
Resolution includes using IP management tools and avoiding overlaps in DHCP and static IP assignments."
질문 # 345
A network administrator wants to configure a backup route in case the primary route fails. A dynamic routing protocol is not installed on the router. Which of the following routing features should the administrator choose to accomplish this task?
정답：D
설명：
Introduction to Administrative Distance
Administrative distance (AD) is a value used by routers to rank routes from different routing protocols. AD represents the trustworthiness of the source of the route. Lower AD values are more preferred. If a router has multiple routes to a destination from different sources, it will choose the route with the lowest AD.
Static Routes and Backup Routes
When a dynamic routing protocol is not used, static routes can be employed. Static routes are manually configured routes. To ensure a backup route, multiple static routes to the same destination can be configured with different AD values.
Configuring Static Routes with Administrative Distance
The primary route is configured with a lower AD value, making it the preferred route. The backup route is configured with a higher AD value. In the event of the primary route failure, the router will then use the backup route.
질문 # 346
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