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NEW QUESTION # 746
A company experienced a breach and wants to implement preventive measures. The network administrator is looking for a tool that can collect, analyze, and quickly correlate known attacks.
Which of the following software tools can accomplish this task?
Answer: C
Explanation:
A SIEM platform collects logs, analyzes them, and correlates events in real time to identify known attack patterns, providing the preventive visibility the company needs after a breach.
NEW QUESTION # 747
Which of the following network cables involves bounding light off of protective cladding?
Answer: A
Explanation:
Multimode fiber optic cables involve the transmission of light signals that bounce off the core's cladding as they travel down the fiber. This characteristic differentiates it from single-mode fiber, where the light travels directly down the fiber without reflecting off the cladding.
Here are some detailed points about multimode fiber cables:
Construction: Multimode fibers have a larger core diameter, typically 50 or 62.5 microns, compared to single-mode fibers, which have a core diameter of about 9 microns.
Light Propagation: The larger core of multimode fiber allows multiple light modes to propagate. These modes travel at different angles, leading to reflections off the core-cladding boundary.
Distance and Bandwidth: Due to modal dispersion, where different light modes arrive at the receiver at different times, multimode fibers are suited for shorter distance applications compared to single-mode fibers. Typical distances are up to 550 meters for 10 Gbps Ethernet using OM4 multimode fiber.
Applications: Multimode fibers are commonly used in LANs (Local Area Networks), data centers, and for shorter distance data transmission due to their cost-effectiveness and ease of installation.
Network Reference:
CompTIA Network+ N10-007 Official Certification Guide, which covers fiber optic technologies, including the differences between multimode and single-mode fibers.
Cisco Networking Academy: Provides training materials and reference guides on the properties of different fiber optic cables.
Fiber Optic Association (FOA): A professional society dedicated to fiber optics, offering extensive information and certification on fiber optic technologies.
Multimode fibers are specifically designed for short-range communication with higher data rates and are typically used in environments like data centers, where high bandwidth over shorter distances is crucial. The reflections off the cladding, inherent to multimode fiber, facilitate this high-capacity communication.
NEW QUESTION # 748
A network administrator changed an external DNS to point customers to a new server. Which of the following tools should the administrator use to test the new server's configuration?
Answer: D
Explanation:
nslookup allows querying DNS records to verify if the new server is correctly resolving domain names.
NEW QUESTION # 749
A company has observed increased user traffic to gambling websites and wants to limit this behavior on work computers. Which of the following should the company most likely implement?
Answer: B
Explanation:
A content filter blocks access to specific websites based on category, URL, or keywords. This is the best solution to restrict gambling websites.
Breakdown of Options:
A: ACLs - Control network access, not specific web content.
B: Content filter - # Correct answer. Used to block access to unwanted websites.
C: Port security - Prevents unauthorized device connections, not web traffic filtering.
D: Screened subnet - A DMZ isolates public-facing servers, not user restrictions.
Reference:
CompTIA Network+ (N10-009) Official Study Guide - Domain 3.3: Given a scenario, implement network security measures.
NEW QUESTION # 750
Which of the following protocol ports should be used to securely transfer a file?
Answer: A
Explanation:
Port 22 is used for SFTP (Secure File Transfer Protocol) and SCP (Secure Copy Protocol), which encrypt file transfers using SSH (Secure Shell). This ensures data is transmitted securely over the network.
NEW QUESTION # 751
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