A signal power of -97dB indicates a very weak signal, which can cause connectivity issues and slow speeds. Splitters on a coaxial line can degrade the signal quality further, so removing them can help improve the signal strength and overall connection quality.
Signal Quality: Splitters can reduce the signal strength by dividing the signal among multiple lines, which can be detrimental when the signal is already weak.
Direct Connection: Ensuring a direct connection from the modem to the incoming line can maximize signal quality and reduce potential points of failure.
Network Reference:
CompTIA Network+ N10-007 Official Certification Guide: Discusses troubleshooting connectivity issues and the impact of signal strength on network performance.
Cisco Networking Academy: Provides insights on maintaining optimal signal quality in network setups.
Network+ Certification All-in-One Exam Guide: Covers common network issues, including those related to signal degradation and ways to mitigate them.

When an organization moves its DNS servers to new IP addresses, the NS (Name Server) records must be updated. The NS record defines which DNS servers are authoritative for a domain. Ifthese records still point to the old IP addresses, clients will continue to query the outdated servers, leading to connectivity issues.
Breakdown of Options:
A). AAAA - This record maps a domain name to an IPv6 address. Since the issue is with DNS resolution, not IP versioning, this is incorrect.
B). CNAME - A CNAME (Canonical Name) record is used for domain aliasing, not for defining authoritative name servers.
C). MX - Mail Exchange (MX) records direct email traffic to the correct mail server, which does not impact general website accessibility.
D). NS - Correct answer. NS records must be updated to reflect the new authoritative DNS servers.
Reference:
CompTIA Network+ (N10-009) Official Study Guide - Domain 1.3: Explain the purpose and properties of DNS records.
RFC 1035: Domain Names - Implementation and Specification

Understanding Multicast:
Multicast IP Address Range: The multicast address range is from 224.0.0.0 to 239.255.255.255, designated for multicast traffic.
Multicast Applications:
Use Case: Multicast is used for one-to-many or many-to-many communication, suitable for applications like audio and video broadcasting where the same data is sent to multiple recipients simultaneously.
Appropriate Network Selection:
224.0.0.0/24 Network: This range is reserved for multicast addresses, making it the appropriate choice for setting up a multicast network.
Comparison with Other Options:
172.16.0.0/24: Part of the private IP address space, used for private networks, not designated for multicast.
192.168.0.0/24: Another private IP address range, also not for multicast.
240.0.0.0/24: Reserved for future use, not suitable for multicast.
Reference:
CompTIA Network+ study materials on IP address ranges and multicast.

A /23 subnet provides 512 total addresses, of which 510 are usable (subtracting 2 for network and broadcast addresses). This would satisfy the need for 255 additional addresses.

If APs are changing channels frequently, it indicates automatic channel selection due to interference. This can cause temporary disconnections as the APs switch frequencies.
Breakdown of Options:
A . Channel interference - ✅ Correct answer. APs change channels automatically to avoid interference, causing disconnections.
B . Roaming misconfiguration - Roaming only affects moving users, but users report issues while stationary.
C . Network congestion - Causes slow speeds, not frequent disconnects.
D . Insufficient wireless coverage - Would cause weak signals, but not channel switching issues.
Reference:
CompTIA Network+ (N10-009) Official Study Guide - Domain 1.6: Explain wireless troubleshooting techniques.