Microsoft MTA 98-366 Practice Test Questions, Microsoft MTA 98-366 Exam Practice Test Questions

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Microsoft Technology Associate: Networking Fundamentals (Exam 98-366)

Local Area Networks (LANs) form the core of modern networking, connecting devices within a limited physical area such as offices, schools, or small campuses. LANs enable computers, printers, servers, and other devices to communicate, share resources, and access centralized services efficiently. Unlike wide area networks, which span larger geographical regions, LANs are designed for high-speed connectivity over short distances, providing low latency and reliable performance. The architecture of a LAN is influenced by network size, purpose, and scalability requirements.

LAN Topologies

Network topologies define how devices are arranged and connected in a LAN. Common topologies include star, ring, bus, and mesh. In a star topology, devices connect to a central switch or hub, simplifying management and troubleshooting. Ring topologies form a closed loop where data circulates in one or both directions, offering predictable performance but limited scalability. Bus topologies rely on a single communication line shared by all devices, which can result in collisions and reduced efficiency. Mesh topologies provide multiple paths between devices, improving redundancy and fault tolerance, but they are complex to implement and maintain.

LAN Hardware Components

The performance and reliability of a LAN depend heavily on hardware components. Network interface cards enable devices to connect physically to the network. Switches efficiently forward data between devices and reduce collisions by creating separate collision domains. Although hubs are largely outdated, they may still be present in legacy networks, functioning as simple signal repeaters. Wireless access points allow devices to connect without cables, supporting mobility and flexible deployment. Each device on a LAN has a unique Media Access Control (MAC) address, ensuring that data is delivered accurately to its intended destination.

Network Performance and Segmentation

Network performance is influenced by bandwidth, collision domains, and segmentation strategies. Bandwidth measures the capacity of a network to transmit data, often expressed in megabits or gigabits per second. Collision domains are areas where data packets may collide if multiple devices transmit simultaneously, causing delays. Switches reduce collisions by creating individual collision domains for each port. Network segmentation, often implemented using Virtual LANs (VLANs), isolates traffic into separate logical networks, improving performance, security, and manageability. Segmentation also simplifies troubleshooting and supports scalable network design.

LAN Security Considerations

Security is a critical aspect of LAN design and operation. Techniques such as MAC address filtering and network access control restrict unauthorized devices from connecting. Firewalls and intrusion detection systems provide additional layers of defense, monitoring traffic and alerting administrators to suspicious activity. Regular updates to firmware and software, combined with user education, help maintain a secure network environment. Network security also involves proper configuration of switches, routers, and access points to prevent unauthorized access and reduce vulnerability to attacks.

Protocols and Communication Standards

Protocols define how devices communicate and ensure data is transmitted accurately and efficiently. Ethernet protocols, governed by IEEE 802.3 standards, regulate wired LAN connections, while IEEE 802.11 standards cover wireless communication. Address Resolution Protocol (ARP) maps IP addresses to MAC addresses, enabling proper routing of data. Quality of Service (QoS) mechanisms prioritize critical applications such as voice and video, maintaining consistent performance and minimizing latency or packet loss. Understanding these protocols is essential for configuring, troubleshooting, and optimizing a LAN.

Monitoring and Management of LANs

Effective LAN administration requires ongoing monitoring and management. Network performance monitors, packet analyzers, and configuration management systems help detect issues, optimize traffic flow, and plan for capacity upgrades. Proactive monitoring reduces downtime and enhances security by identifying potential threats early. Documentation of network topology, device configurations, and operational procedures supports efficient troubleshooting and future network expansions. Regular assessment of performance metrics and adherence to best practices ensures that LANs continue to meet organizational needs.

Evolution of Local Area Networks

LANs have evolved from early implementations using coaxial cables and hubs to modern networks leveraging fiber optics, gigabit Ethernet, and wireless access points. Advances such as virtualization, software-defined networking, and cloud integration allow organizations to manage network resources dynamically. This evolution has improved scalability, flexibility, and efficiency, enabling networks to support complex applications and hybrid infrastructures. Familiarity with LAN evolution helps administrators understand current standards and anticipate future trends in networking technology.

Addressing and Subnetting

Network addressing and subnetting are fundamental to LAN design. IP addresses uniquely identify devices on a network, while subnetting divides a network into smaller, manageable segments. Subnet masks determine which portion of an IP address identifies the network and which identifies the host. Proper subnetting reduces broadcast traffic, improves performance, and simplifies routing. Efficient IP management is essential to prevent address conflicts and to ensure that networks can grow without disruption.

Integrating LANs with Other Networks

LANs often interface with other networks, including wide area networks, cloud services, and the internet. Routers, gateways, and firewalls manage these connections, controlling traffic flow and maintaining security. Understanding how LANs integrate with broader network architectures provides a foundation for more advanced topics such as routing, switching, and network virtualization. Well-designed LANs support reliable communication, resource sharing, and seamless access to external networks while maintaining security and performance standards.

Exam 98-366: Understanding the OSI Model

The OSI model is a conceptual framework that standardizes the functions of a telecommunication or computing system into seven distinct layers. Understanding the OSI model is a core requirement for Exam 98-366, as it helps network administrators and IT professionals identify how data travels through networks and how various protocols and devices interact. Each layer performs specific functions and interacts with the layers directly above and below it, creating a systematic approach to network communication.

The seven layers of the OSI model are the physical layer, data link layer, network layer, transport layer, session layer, presentation layer, and application layer. The physical layer deals with the transmission of raw bits over physical media, including cabling, connectors, and signaling. The data link layer ensures reliable transmission between adjacent network nodes, managing MAC addressing, error detection, and frame formatting. The network layer handles logical addressing and routing, determining the best path for data to reach its destination.

Exam 98-366: Data Link and Physical Layer Concepts

For Exam 98-366, understanding the physical and data link layers is essential. The physical layer includes hardware devices such as network interface cards, switches, hubs, and cabling. It defines how electrical or optical signals are transmitted and how bits are encoded and decoded. The data link layer, which includes protocols like Ethernet, ensures data frames are error-free and delivered correctly to the next node. Media Access Control (MAC) addresses are used at this layer to uniquely identify devices on the network. Concepts like collision domains, broadcast domains, and VLANs are closely tied to this layer and are often tested on the exam.

Switching technology, a critical part of the data link layer, improves LAN performance by creating separate collision domains for each device, reducing packet collisions, and enhancing overall network efficiency. Exam 98-366 emphasizes the ability to differentiate between hubs and switches, understand their roles, and describe how switches manage traffic through MAC address tables. VLANs extend this functionality by logically segmenting networks, improving both performance and security.

Exam 98-366: Network Layer and IP Addressing

The network layer is central to Exam 98-366, as it handles logical addressing and routing, enabling data to move between devices on different networks. Internet Protocol (IP) is the most common protocol at this layer, providing unique IP addresses for devices and facilitating the routing of packets across interconnected networks. Subnetting, subnet masks, and the distinction between public and private IP addresses are key concepts that exam candidates must master.

Routing devices, such as routers, operate at the network layer, directing packets based on destination IP addresses. Understanding routing tables, default gateways, and the role of dynamic routing protocols is critical for the exam. Exam 98-366 also tests knowledge of IPv4 and IPv6 addressing, including the differences in address length, structure, and subnetting methods. Network layer security considerations, such as the use of access control lists (ACLs), also fall within the scope of the exam.

Exam 98-366: Transport, Session, Presentation, and Application Layers

The upper layers of the OSI model—transport, session, presentation, and application—manage end-to-end communication and user interaction with networked applications. The transport layer is responsible for reliable data transfer and error correction, using protocols such as TCP for connection-oriented communication and UDP for connectionless communication. Understanding port numbers, flow control, and segmentation is essential for Exam 98-366.

The session layer establishes, maintains, and terminates communication sessions between applications. It ensures that data streams remain synchronized and organized. The presentation layer translates data between the network and application formats, handling tasks such as encryption, compression, and encoding. Finally, the application layer provides services directly to end-users, supporting protocols such as HTTP, FTP, SMTP, and DNS. Exam 98-366 requires familiarity with these protocols, their purposes, and how they function within the OSI model.

Exam 98-366: Layer Interaction and Troubleshooting

A key focus of Exam 98-366 is understanding how layers interact and how to troubleshoot network issues effectively. Problems can occur at any layer, and the OSI model provides a structured approach for diagnosis. For example, if a device cannot communicate over the network, the issue might lie at the physical layer (cabling or NIC), data link layer (MAC addressing or switch configuration), or network layer (IP addressing or routing).

Troubleshooting tools such as ping, tracert, and ipconfig (or ifconfig on Linux systems) help identify and resolve issues across different layers. Exam 98-366 emphasizes the ability to describe the role of these tools, interpret their output, and understand the underlying network concepts. Knowledge of encapsulation, where data is wrapped with protocol information at each layer, is also important for understanding how data flows from the application layer to the physical layer and back.

Exam 98-366: Real-World Applications of the OSI Model

Understanding the OSI model is not purely theoretical; it has direct applications in designing, implementing, and managing networks. Network segmentation, security policies, and performance optimization all rely on a solid grasp of OSI layer functions. Exam 98-366 tests not only knowledge of individual layers but also the ability to apply that knowledge to real-world networking scenarios.

For example, configuring a firewall requires understanding which OSI layers it inspects—network and transport layers for IP and TCP/UDP traffic, or application layer for more granular control. Similarly, implementing VLANs requires familiarity with the data link layer, while troubleshooting internet connectivity often involves examining physical, data link, and network layers together. These practical applications ensure that candidates can translate theoretical knowledge into effective network management practices.

Exam 98-366: Understanding Wired Networks

Wired networks form the backbone of most enterprise and home network infrastructures. They provide reliable, high-speed communication using physical media, typically copper or fiber optic cables. Copper cabling, such as twisted pair (UTP/STP), is widely used in Ethernet networks for speeds up to 10 Gbps, depending on cable category and network standards. Fiber optic cables offer higher bandwidth and longer transmission distances, using light pulses instead of electrical signals to carry data. Exam 98-366 emphasizes knowledge of these cabling types, their characteristics, and appropriate use cases.

Ethernet is the dominant wired network technology, governed by the IEEE 802.3 standard. Ethernet defines physical media, data frame structures, and signaling methods for transmitting data across LANs. Network administrators must understand key Ethernet concepts such as frame size, collision domains, and bandwidth limitations. Exam 98-366 may require differentiating between half-duplex and full-duplex Ethernet, which affects how data is transmitted and received simultaneously. Switches in wired networks reduce collisions by assigning dedicated bandwidth per port, while hubs, largely obsolete, share bandwidth and increase collision risks.

Structured cabling standards, such as TIA/EIA-568, specify how cables should be installed and terminated to maintain network performance. Patch panels, cable management, and proper grounding are essential for maintaining signal integrity and preventing interference. Understanding cabling layouts, including horizontal and backbone cabling, is important for Exam 98-366 as it relates to LAN infrastructure. Proper planning ensures scalability, reliability, and adherence to industry best practices.

Exam 98-366: Understanding Wireless Networks

Wireless networks provide mobility and flexibility by transmitting data over the air using radio frequencies. Wireless LANs (WLANs) commonly follow IEEE 802.11 standards, with variations such as 802.11n, 802.11ac, and 802.11ax offering different speeds, frequency bands, and features. Wireless networks are widely deployed in homes, offices, and public spaces to support mobile devices, laptops, and IoT devices. Exam 98-366 requires understanding the principles of wireless networking, including frequency bands, access point placement, and security considerations.

Wireless networks operate in two frequency ranges: 2.4 GHz and 5 GHz, with 6 GHz available in newer standards like Wi-Fi 6E. The 2.4 GHz band provides longer range but is prone to interference, while the 5 GHz band supports higher speeds with reduced interference but shorter range. Wireless channels, signal strength, and interference from other devices impact performance. Understanding these concepts is critical for designing and troubleshooting wireless networks for Exam 98-366.

Security in wireless networks is a major concern. Protocols such as WPA2 and WPA3 provide encryption and authentication to protect data from unauthorized access. Exam 98-366 emphasizes the importance of configuring SSIDs, strong passwords, and authentication methods to ensure secure wireless connectivity. Additional measures, such as disabling SSID broadcast, using MAC address filtering, and implementing network segmentation, enhance security in enterprise WLANs.

Exam 98-366: Internet Protocol and TCP/IP Fundamentals

TCP/IP is the foundational protocol suite for modern networks, enabling communication across LANs, WANs, and the Internet. Exam 98-366 tests knowledge of TCP/IP layers, addressing, and functions. TCP/IP is structured into four layers: network interface, internet, transport, and application. The network interface layer handles hardware communication, the internet layer manages logical addressing and routing, the transport layer ensures reliable delivery, and the application layer supports end-user services.

IP addressing is a critical concept. IPv4 addresses are 32-bit numeric identifiers, divided into network and host portions using subnet masks. IPv6 addresses are 128-bit, providing a vastly larger address space and simplified routing. Exam 98-366 requires understanding the differences between IPv4 and IPv6, including notation, subnetting, and address assignment. Static and dynamic IP addressing, using DHCP, is also part of the exam objectives.

TCP (Transmission Control Protocol) provides connection-oriented, reliable communication. It ensures data is delivered in sequence, with error detection and retransmission. UDP (User Datagram Protocol) provides connectionless, low-latency communication without guaranteed delivery, suitable for applications such as video streaming or DNS queries. Understanding when to use TCP versus UDP, as well as the role of ports and sockets, is important for Exam 98-366.

Exam 98-366: Implementing TCP/IP Using the Command Line

Practical application of TCP/IP knowledge involves using command-line tools to configure and troubleshoot network connections. Commands such as ipconfig (or ifconfig on Unix-based systems), ping, tracert/traceroute, and netstat allow administrators to verify IP settings, test connectivity, and analyze network routes. Exam 98-366 requires familiarity with these tools and the ability to interpret their output to identify common networking issues.

For example, the ping command tests reachability between devices and measures round-trip time. Tracert/traceroute shows the path packets take to reach a destination, highlighting latency and routing issues. Netstat displays active connections and listening ports, aiding in network monitoring and troubleshooting. Command-line proficiency ensures that candidates can apply TCP/IP concepts practically, beyond theoretical knowledge.

Exam 98-366: Networking Services and Their Functions

Networking services are essential for efficient and reliable network operation. Exam 98-366 covers services such as DHCP, DNS, NAT, and VPNs, which provide core functionality for network communication. DHCP (Dynamic Host Configuration Protocol) automatically assigns IP addresses and network settings to devices, reducing administrative overhead and preventing address conflicts. DNS (Domain Name System) resolves human-readable domain names to IP addresses, facilitating communication across networks.

Network Address Translation (NAT) allows multiple devices on a private network to share a single public IP address, conserving address space and improving security. Virtual Private Networks (VPNs) enable secure, encrypted connections over untrusted networks, allowing remote users to access internal resources safely. Exam 98-366 tests understanding of how these services operate, how they interact with TCP/IP, and their role in maintaining network functionality and security.

Other important networking services include file sharing, print services, and network time synchronization. File and print services allow centralized access to resources, improving collaboration and efficiency. Network Time Protocol (NTP) ensures synchronized time across devices, which is essential for logging, security, and scheduling tasks. Understanding these services, their configurations, and their implications for performance and security is necessary for Exam 98-366.

Exam 98-366: Integration of Wired, Wireless, and Services

Effective networking requires integrating wired and wireless infrastructures with core networking services. Wired connections provide high-speed, reliable backbone connectivity, while wireless networks extend access to mobile and remote devices. Networking services support both types of networks, ensuring devices can obtain addresses, resolve names, and communicate securely. Exam 98-366 emphasizes the ability to describe how these components work together and troubleshoot issues that arise from their interaction.

For example, a DHCP server must provide consistent addressing across both wired and wireless clients. DNS services must resolve hostnames regardless of network type. Security policies must encompass all endpoints, whether connected via cable or Wi-Fi. Understanding the integration of these elements ensures candidates can design, implement, and maintain robust network environments that meet business and operational requirements.

Exam 98-366: Troubleshooting Wired and Wireless Networks

Troubleshooting is a critical skill for networking professionals. Exam 98-366 focuses on identifying common issues in wired and wireless networks and applying appropriate diagnostic techniques. Wired network problems may include faulty cabling, incorrect switch configurations, or IP address conflicts. Wireless issues often involve interference, signal strength, misconfigured access points, or authentication failures.

Using command-line tools and monitoring software, administrators can isolate problems, test connectivity, and verify configurations. Understanding how TCP/IP protocols and networking services interact with both wired and wireless networks allows for systematic troubleshooting. Exam 98-366 requires candidates to explain how they would diagnose and resolve network issues using both theoretical knowledge and practical application.

Exam 98-366: Understanding Wide Area Networks

Wide Area Networks (WANs) connect devices and LANs over large geographical areas, enabling communication between offices, cities, and countries. Unlike LANs, which are confined to smaller spaces, WANs must address challenges such as latency, bandwidth limitations, and varying transmission media. Exam 98-366 emphasizes understanding WAN concepts, including technologies, protocols, and design considerations.

WAN technologies include leased lines, MPLS (Multiprotocol Label Switching), DSL, cable, fiber, and satellite connections. Leased lines provide dedicated point-to-point connectivity with predictable performance, suitable for organizations that require constant bandwidth. MPLS networks allow multiple locations to communicate over shared infrastructure while maintaining efficient routing and traffic prioritization. Wireless WANs, such as 4G, 5G, and satellite networks, extend connectivity to remote or mobile users, although they are subject to higher latency and variable throughput.

Key WAN concepts include latency, jitter, and packet loss. Latency measures the time it takes for data to travel from source to destination, impacting time-sensitive applications like VoIP and video conferencing. Jitter refers to the variation in packet arrival times, which can disrupt streaming and real-time communications. Packet loss occurs when data fails to reach its destination, often due to congestion, faulty hardware, or signal degradation. Understanding these metrics allows network administrators to optimize performance and troubleshoot WAN issues effectively.

Exam 98-366: WAN Protocols and Connectivity

WAN connectivity relies on specific protocols and technologies to ensure data is transmitted efficiently. Point-to-Point Protocol (PPP) provides a simple method for connecting two nodes over serial links, supporting authentication and error detection. Frame Relay, an older packet-switched technology, enabled efficient communication for multiple sites but has largely been replaced by modern alternatives. Internet Protocol (IP) remains the dominant addressing and routing protocol across WANs, with TCP ensuring reliable delivery of data.

Virtual Private Networks (VPNs) are crucial for WANs, offering encrypted tunnels over public networks. VPNs allow remote employees and branch offices to securely access internal resources without requiring dedicated lines. Site-to-site and remote-access VPNs differ in scope but share the common purpose of protecting data in transit. Exam 98-366 requires understanding how VPNs function, their role in WAN design, and the security implications for organizational networks.

Exam 98-366: Network Security Fundamentals

Network security is a cornerstone of networking knowledge for Exam 98-366. Security strategies protect devices, data, and services from unauthorized access, misuse, and attacks. Core concepts include confidentiality, integrity, and availability, which collectively ensure that information is accessible only to authorized users, remains unaltered, and is available when needed.

Firewalls, intrusion detection systems (IDS), and intrusion prevention systems (IPS) are essential security tools. Firewalls control incoming and outgoing traffic based on predetermined rules, while IDS monitors for suspicious activity and alerts administrators. IPS actively blocks detected threats. Security policies, access controls, and user authentication mechanisms complement these technologies by defining who can access network resources and under what conditions.

Encryption is critical for protecting data in transit and at rest. Protocols such as SSL/TLS, IPsec, and WPA2/WPA3 secure communication channels, preventing interception or tampering. Exam 98-366 emphasizes understanding encryption principles, key management, and the distinction between symmetric and asymmetric encryption. Additionally, administrators must recognize common threats such as malware, phishing, denial-of-service attacks, and social engineering, and implement strategies to mitigate risks.

Exam 98-366: Securing LANs, WANs, and Wireless Networks

Securing different types of networks requires tailored strategies. In LANs, security measures include MAC address filtering, VLAN segmentation, and port security to limit access. Switches and routers may implement ACLs to control traffic flow, while endpoint security protects individual devices. Wireless networks require additional precautions due to their exposure to the air interface. Configuring strong authentication, encryption, and secure SSID settings is essential to prevent unauthorized access.

For WANs, security focuses on protecting data as it traverses public or shared networks. VPNs provide encrypted channels, while firewall policies control traffic between sites. Network monitoring and logging are crucial for detecting anomalies, tracing malicious activity, and responding to incidents promptly. Exam 98-366 evaluates understanding of these practices and the ability to explain how they are implemented across different network environments.

Exam 98-366: Network Troubleshooting and Optimization

Troubleshooting is a critical skill assessed in Exam 98-366. It involves identifying and resolving problems related to connectivity, performance, and configuration. Administrators must understand diagnostic tools and their applications. Command-line utilities like ping, tracert/traceroute, and netstat are essential for testing reachability, analyzing routing paths, and monitoring network connections.

Network monitoring systems, performance analyzers, and traffic sniffers provide insights into congestion, latency, and security incidents. Systematic troubleshooting often starts at the physical layer, checking cabling and hardware, and proceeds through the data link, network, and transport layers to isolate the problem. Optimizing network performance may involve adjusting bandwidth allocation, segmenting traffic with VLANs, or reconfiguring routing protocols to reduce latency and improve reliability.

Exam 98-366: Preparing for the Exam

Exam 98-366 requires a combination of theoretical knowledge and practical skills. Candidates should understand the principles of LANs, WANs, wired and wireless networks, TCP/IP, network services, and security. Study strategies include reviewing OSI and TCP/IP models, memorizing protocol functions and port numbers, and practicing IP addressing and subnetting. Hands-on experience with network configuration and troubleshooting is invaluable.

Familiarity with exam objectives ensures that candidates focus on the topics most likely to appear. Practical exercises, labs, and simulations help reinforce understanding of network implementation and maintenance. Reviewing case studies of real-world network scenarios can provide insight into how concepts are applied in professional environments.

Exam 98-366: Integrating Knowledge for Practical Application

The final step in preparing for Exam 98-366 is integrating knowledge across all network domains. Understanding how LANs, WANs, wireless networks, TCP/IP protocols, and security measures interact is crucial for designing, maintaining, and troubleshooting networks effectively. Candidates must be able to apply theory to real-world scenarios, such as diagnosing connectivity issues, securing network resources, and ensuring efficient communication between sites.

Exam 98-366 tests the ability to analyze, explain, and implement networking concepts. Success requires not only memorization but also critical thinking, problem-solving, and the ability to translate technical knowledge into practical actions. A thorough grasp of networking fundamentals prepares candidates for more advanced certifications and a career in IT and networking.

Final Thoughts 

The Microsoft MTA Networking Fundamentals 98-366 exam provides a solid foundation for anyone starting a career in IT. It covers essential networking concepts, from understanding local area networks to mastering protocols, services, and security practices. By studying the material in a structured way, candidates gain not only the knowledge needed to pass the exam but also practical skills applicable to real-world networking environments.

Local area networks form the backbone of the IT infrastructure. Understanding how LANs operate, including topologies, hardware, performance factors, and segmentation, is crucial for building reliable networks. The OSI model and TCP/IP protocols provide a conceptual framework for understanding how data flows, how layers interact, and how communication is structured. These frameworks are essential for troubleshooting, network design, and integrating multiple technologies effectively.

Wired and wireless networks each have unique strengths and challenges. Wired networks offer high-speed, low-latency connectivity, while wireless networks provide flexibility and mobility. Knowledge of Ethernet, Wi-Fi standards, cabling, signal interference, and access point configuration ensures that both types of networks can coexist and operate efficiently. TCP/IP protocols and command-line tools allow administrators to configure and troubleshoot networks, ensuring devices can communicate reliably.

Networking services such as DHCP, DNS, NAT, and VPNs are critical for managing IP addressing, name resolution, and secure connectivity across LANs and WANs. Wide area networks extend connectivity over long distances, requiring an understanding of routing, latency, VPNs, and monitoring tools. Security remains a cornerstone of networking, emphasizing firewalls, intrusion detection, encryption, and best practices to protect data and resources across all network types.

Success in Exam 98-366 requires both theoretical knowledge and practical application. Understanding concepts deeply, practicing configuration, and troubleshooting exercises, and applying critical thinking to real-world scenarios are key. The exam encourages candidates to integrate knowledge across multiple areas, ensuring a comprehensive understanding of networking fundamentals that can serve as a foundation for advanced certifications and professional IT roles.

Ultimately, mastering the topics covered in Exam 98-366 equips candidates with the skills needed to design, implement, and manage networks effectively. It also fosters a mindset of problem-solving and analytical thinking, which is essential in the evolving field of IT. For those beginning their journey in networking, the MTA Networking Fundamentals certification is not just a credential—it is a stepping stone toward a career where understanding the flow of information, securing it, and ensuring reliable communication are fundamental to success.

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