Correct Answer: A

Link Layer Discovery Protocol (LLDP) is a network protocol used for discovering devices and their capabilities on a local area network, primarily at the data link layer (Layer 2). It helps in identifying the connected switch and the specific port to

which a device is connected. When troubleshooting a VoIP handset connection, the technician can use LLDP to determine the exact switch and port where the handset is connected. This protocol is widely used in network management to

facilitate the discovery of network topology and simplify troubleshooting.

Other options such as IKE (Internet Key Exchange), VLAN (Virtual LAN), and netstat (network statistics) are not suitable for identifying the switch and port information. IKE is used in setting up secure IPsec connections, VLAN is used for

segmenting networks, and netstat provides information about active connections and listening ports on a host but not for discovering switch port details.

Reference: CompTIA Network+ Certification Exam Objectives - Network Troubleshooting and Tools section.

Correct Answer: B

Understanding End-of-Support:

uk.co.certification.simulator.questionpool.PList@7662a7f2 Risks of Keeping an End-of-Support Device:

Best Next Step - Replacement:

Comparison with Other Options:

References:

CompTIA Network+ study materials on network maintenance and security best practices.

Correct Answer: C

Correct Answer: A

The subnet mask should be in the standard format, such as 255.255.255.0, which is a typical subnet mask for a Class C network. The value provided (225.225.225.224) is not a valid subnet mask and should be corrected to match the appropriate subnet for the network, often 255.255.255.0 for a typical home or small office network.

Correct Answer: D

SFP+ is a type of optical transceiver that supports 10G single-channel transmission over fiber optic cables. SFP+ stands for small form-factor pluggable plus, and it is compatible with SFP slots on switches and routers.

Correct Answer: A

Correct Answer: C

Correct Answer: D

The transport layer is the fourth layer of the OSI model, and it is responsible for end-to-end delivery of data over a network. It uses standard protocols such as TCP, UDP, and DCCP to enhance its functionalities. One of the main functions of the transport layer is to ensure that messages are transmitted to their destinations reliably and in the correct order. It also prevents data duplication by using sequence numbers, acknowledgments, and retransmission mechanisms

Correct Answer: D

A CNAME (Canonical Name) record is a type of DNS (Domain Name System) record that maps an alias name to a canonical or true domain name. For example, a CNAME record can map blog.example.com to example.com, which means that blog.example.com is an alias of example.com. A CNAME record is useful when you want to point multiple subdomains to the same IP address, or when you want to change the IP address of a domain without affecting the subdomains1.

Correct Answer: D

References

1: CompTIA Network+ N10-008 Cert Guide - O'Reilly Media

2: Network+ (Plus) Certification | CompTIA IT Certifications

3: 10 Ways to Secure Office Workstations - Computer Security