Explanation
The network administrator would configure scope options to set NTP settings for a specific subnet within DHCP. Scope options are settings that apply to a range of IP addresses that are assigned by a DHCP server.
Scope options can include parameters such as default gateway, DNS server, and NTP server. By configuring the NTP server option for a specific scope, the network administrator can ensure that the devices in that subnet synchronize their clocks with the same time source. References: CompTIA Network+ N10-008 Certification Study Guide, page 121; The Official CompTIA Network+ Student Guide (Exam N10-008), page 5-11.

Explanation
Multiprotocol Label Switching, or MPLS, is a networking technology that routes traffic using the shortest path based on "labels," rather than network addresses, to handle forwarding over private wide area networks. As a scalable and protocol-independent solution, MPLS assigns labels to each data packet, controlling the path the packet follows. MPLS greatly improves the speed of traffic, so users don't experience downtime when connected to the network.

Explanation
A brute-force attack is a method of guessing passwords by trying every possible combination of characters until the correct one is found. The longer and more complex the password, the harder it is to crack by brute-force. A password that provides the best defense against a brute-force attack should have a combination of uppercase and lowercase letters, numbers, and special characters, and should be as long as possible. The password T5!8j5 meets these criteria, while the other options are either too short, too simple, or too common.
References:
Password Attacks - N10-008 CompTIA Network+ : 4.21
CompTIA Network+ Cert Guide: Security Concepts and Tools, page 25
https://www.pearsonitcertification.com/articles/article.aspx?p=3021579&seqNum=2