Bollards are an example of a method that is used to prevent motor vehicles from getting too close to building entrances and exits. Bollards are short, sturdy posts that are installed on sidewalks, parking lots, or roads to create physical barriers and control traffic flow. Bollards can be used to protect pedestrians, buildings, or other structures from vehicle collisions or attacks. Bollards can be made of various materials, such as metal, concrete, or plastic, and can be fixed, removable, or retractable.
Reference: https://en.wikipedia.org/wiki/Bollard

The best course of action to preserve business continuity for a very old PC that is running a critical, proprietary application in MS-DOS is to purchase matching hardware and clone the disk. This way, the technician can create an exact copy of the PC's configuration and data on another PC that has the same specifications and compatibility. This will ensure that the application can run smoothly on the new PC without any installation or configuration issues. Performing scheduled chkdsk tests would not help, as chkdsk is a tool that checks and repairs disk errors, but does not prevent hardware failures or software compatibility issues. Upgrading the hard disk to SSD would not help either, as SSDs may not be compatible with the old PC or the MS-DOS operating system. Performing quarterly backups would help with data protection, but not with hardware availability or software compatibility. References: https://www.howtogeek.com/199068/how-to- upgrade-your-existing-hard-drive-in-under-an-hour/ https://www.howtogeek.com/66776/how-to-repair-disk- errors-in-windows-7/

Aperpetual licenseis a one-time purchase that allows the software to be used indefinitely without recurring costs. This meets the requirement of a non-renewing, one-time capital expense.
* Perpetual (Answer D):This is a one-time purchase and does not require renewal, making it ideal for capital expenditure.
* Open-source (Option A):Open-source software is usually free but may not meet specific licensing requirements.
* Subscription (Option B):This typically involves recurring payments, which contradicts the non- renewing expense requirement.
* Volume (Option C):Volume licenses are used for purchasing multiple licenses at a discount but may still involve subscription-based renewals.
CompTIA Server+ Reference:This topic is covered underSK0-005 Objective 2.1: Explain licensing concepts for software.

The best disk type for a high-performance financial application is a SAS SSD. A SAS SSD (Serial Attached SCSI Solid State Drive) is a type of storage device that uses flash memory chips to store data and has a SAS interface to connect to a server or a storage array. A SAS SSD offers high speed, low latency, high reliability, and high durability compared to other types of disks, such as SATA SSDs, SAS HDDs, or SATA HDDs. A SAS SSD can handle high I/O workloads and deliver consistent performance for applications that require fast data access and processing.
Reference:
https://www.hp.com/us-en/shop/tech-takes/sas-vs-sata