Comprehensive and Detailed Explanation From Exact Extract:
Highmemory usage (97%)suggests the system is overloaded with active processes. The technician should close unneeded applications to free up RAM and improve performance.
FromMike Meyers' Lab Manual:
"When memory usage is near capacity, close all non-essential programs. This can dramatically improve response time without needing hardware upgrades."

Comprehensive and Detailed Explanation From Exact Extract:
FAT32cannot support files larger than 4GB.NTFSsupports large file sizes and is compatible across Windows systems, making it the correct choice for transferring a 4.57GB file.
FromAll-in-One Exam Guide:
"NTFS is the preferred file system for large file transfers within Windows. FAT32 has a 4GB file size limit, which makes it unsuitable for modern use cases involving large files."

See explanation below.
Explanation:
First Chat Response:When the user mentions setting up a new router, the best initial response to maintain a helpful and professional tone is:
>Select reply:"I am happy to assist you today."
Second Chat Response:When the user states that they need to set up basic security settings:
>Select reply:"Is this the first router in your office?"
Third Chat Response:After learning it's a replacement router and the user is logged into the router's web page:
>Select reply:"The first thing you need to do is change the default password." Fourth Chat Response:For the response about password settings:
>Select reply:"Create a new password with an uppercase, a lowercase, and a special character." Fifth Chat Response:When the router prompts to reboot:
>Select reply:"Yes, reboot please."
Study Guide Reference: The CompTIA A+ Core 2 guide highlights the importance of changing default credentials and using strong password policies, particularly in SOHO environments where routers are often targeted.

Comprehensive and Detailed Explanation From Exact Extract:
A bollard is a sturdy physical barrier-often a steel or concrete post-designed to prevent vehicles or unauthorized individuals from ramming into or entering secure areas of a building. It provides physical security and is commonly used outside entrances to prevent forced entry.
A: PIV (Personal Identity Verification) cards are used for identity access control, not physical blocking.
B: Motion lighting may deter activity but doesn't physically prevent entry.
C: Surveillance records activity but cannot stop a forced entry.
Reference:
CompTIA A+ 220-1102 Objective 2.4: Compare and contrast physical security measures.
Study Guide Section: Physical security devices - barriers, bollards, and deterrents

Comprehensive and Detailed Explanation From Exact Extract:
Smishing (SMS phishing) is a type of social engineering attack where attackers send fraudulent text messages to trick users into revealing sensitive information or downloading malware. These messages often impersonate banks, delivery services, or official institutions to lure the victim into clicking malicious links.
A: Impersonation is an in-person or voice-based tactic.
B: Vishing refers to voice phishing over phone calls.
C: Spear phishing is a targeted email-based phishing method.
Reference:
CompTIA A+ 220-1102 Objective 2.3: Compare and contrast social engineering techniques.
Study Guide Section: Smishing as a type of phishing via SMS or mobile messaging.