Which of the following disaster recovery concepts is calculated by dividing the total hours of operation by the total number of units?
Answer(s): B
MTBF (Mean Time Between Failures) is calculated by dividing the total hours of operation by the total number of failures in a system. It is a key disaster recovery and reliability metric used to measure the average time a system operates before experiencing a failure.Formula:
A network administrator has been monitoring the company's servers to ensure that they are available.Which of the following should the administrator use for this task?
Answer(s): C
SNMP (Simple Network Management Protocol) traps allow a network administrator to monitor server availability by receiving real-time alerts when a server goes down or experiences issues. Traps are asynchronous notifications sent by network devices to an SNMP management system when predefined events occur, such as high CPU usage, link failures, or server unavailability.
A network engineer is completing a wireless installation in a new building. A requirement is that all clients be able to automatically connect to the fastest supported network.Which of the following best supports this requirement?
Answer(s): A
Band steering helps clients automatically connect to the fastest supported network by encouraging devices to use the 5GHz band instead of the 2.4GHz band when they support both. The 5GHz band offers higher speeds and less interference compared to 2.4GHz. Band steering detects dual-band capable devices and directs them to 5GHz, ensuring optimal performance.
A network technician notices a device is at EOL. For which of the following should the technician plan?
When a device reaches EOL (End of Life), it means the manufacturer no longer provides support, updates, or security patches for it. The proper action is to decommission the device, which involves removing it from production, securely erasing data, and disposing of or recycling it properly.
A company implements a video streaming solution that will play on all computers that have joined a particular group, but router ACLs are blocking the traffic.Which of the following is the most appropriate IP address that will be allowed in the ACL?
The 224.0.0.1 IP address belongs to the multicast address range (224.0.0.0 - 239.255.255.255), specifically the all-hosts multicast group. This means that any device on the network subscribed to the multicast group will receive the video stream. Multicast is commonly used for streaming video and other content to multiple devices efficiently without sending multiple unicast copies.
Which of the following are the best device-hardening techniques for network security? (Choose two.)
Answer(s): A,E
Device hardening is the process of securing network devices to reduce vulnerabilities and minimize attack surfaces. The two best techniques for network security are:Disabling unused ports Prevents unauthorized access by closing physical and logical network ports that are not in use, reducing the risk of exploitation.Changing default passwords Default passwords are well-known to attackers. Changing them to strong, unique passwords is essential to prevent unauthorized access.
Which of the following allows for the interception of traffic between the source and destination?
An on-path attack (formerly known as Man-in-the-Middle (MitM) attack) occurs when an attacker intercepts and potentially alters communication between a source and destination without their knowledge. This allows attackers to eavesdrop, capture sensitive data, inject malicious content, or manipulate communication.
A company discovers on video surveillance recordings that an unauthorized person installed a rogue access point in its secure facility.Which of the following allowed the unauthorized person to do this?
Answer(s): D
Tailgating occurs when an unauthorized person gains physical access to a secure area by following an authorized individual without proper authentication. This social engineering attack allows attackers to enter restricted areas where they can install rogue access points or other malicious devices without being detected.
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