Certainly! Below are six sample cover letters for subpositions related to "lan-wan-setup". Each sample fills in the fields you specified.

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**Sample 1**
Position number: 1
Position title: Network Administrator
Position slug: network-administrator
Name: John
Surname: Smith
Birthdate: 1985-05-12
List of 5 companies: Cisco, Microsoft, Amazon, IBM, Facebook
Key competencies: LAN/WAN architecture, troubleshooting, network security, Cisco routers, firewall management

Dear Hiring Manager,

I am writing to express my interest in the Network Administrator position. With solid experience in LAN and WAN setups, I have honed my skills in network architecture and security, making me a strong candidate for this role.

At Cisco, I was responsible for designing and implementing network solutions that improved performance and reduced downtime. My proficiency with Cisco routers and firewall management has allowed me to ensure robust security across multiple networks.

I am excited about the opportunity to leverage my expertise in a new setting and contribute to your team’s success.

Thank you for considering my application.

Best Regards,
John Smith

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**Sample 2**
Position number: 2
Position title: Network Engineer
Position slug: network-engineer
Name: Sarah
Surname: Johnson
Birthdate: 1990-03-22
List of 5 companies: Huawei, AT&T, Verizon, Nippon Telegraph and Telephone, BT Group
Key competencies: Network design, performance optimization, troubleshooting, technical documentation, team collaboration

Dear [Hiring Manager's Name],

I am excited to apply for the Network Engineer position. With hands-on experience in designing and optimizing LAN and WAN infrastructures, I am eager to bring my skills to your esteemed team.

During my tenure at AT&T, I played a crucial role in enhancing network performance and reliability. I excel in troubleshooting complex network issues and creating thorough technical documentation, which helps streamline future projects.

I am looking forward to the opportunity to work with you and enhance your network capabilities.

Thank you for considering my candidacy.

Sincerely,
Sarah Johnson

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**Sample 3**
Position number: 3
Position title: IT Support Specialist
Position slug: it-support-specialist
Name: Michael
Surname: Williams
Birthdate: 1992-07-18
List of 5 companies: Lenovo, HP, Nokia, Dell Technologies, Siemens
Key competencies: Customer service, technical support, networking protocols, incident management, hardware proficiency

Dear [Hiring Manager's Name],

I am writing to apply for the IT Support Specialist position. I have a strong background in LAN/WAN setups and experience in providing technical support to end-users.

At Lenovo, I was the first point of contact for network-related issues. My customer service skills and technical know-how allowed me to resolve issues swiftly, ensuring minimal downtime for our users.

I am keen to bring my expertise and passion for technology to your team.

Thank you for your consideration.

Warm regards,
Michael Williams

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**Sample 4**
Position number: 4
Position title: Systems Administrator
Position slug: systems-administrator
Name: Emily
Surname: Brown
Birthdate: 1988-09-04
List of 5 companies: Intel, Oracle, Red Hat, SAP, VMware
Key competencies: System installation, network monitoring, virtualization, security protocols, backup and recovery

Dear [Hiring Manager's Name],

I am enthusiastic about applying for the Systems Administrator position. With a solid understanding of LAN and WAN architecture, I’ve successfully managed network systems to enhance operational efficiency.

In my recent role at Oracle, I implemented network monitoring solutions that led to a 30% reduction in system downtimes. My knowledge of virtualization technologies and security protocols reinforces my ability to manage complex systems effectively.

I am excited about the possibility of contributing to your team and enhancing system performance.

Best,
Emily Brown

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**Sample 5**
Position number: 5
Position title: Network Technician
Position slug: network-technician
Name: David
Surname: Wilson
Birthdate: 1994-11-30
List of 5 companies: T-Mobile, Sprint, ZTE, Comcast, CenturyLink
Key competencies: Cable management, router/switch configuration, installation, network performance tuning, troubleshooting

Dear [Hiring Manager's Name],

I am eager to submit my application for the Network Technician position. My hands-on experience in LAN/WAN setups and ability to swiftly troubleshoot network issues position me as a valuable addition to your team.

While working at T-Mobile, I was responsible for installing and configuring routers and switches, ensuring optimal network performance. My expertise in cable management and performance tuning has consistently helped achieve project goals.

I appreciate the opportunity to apply and look forward to discussing how I can contribute to your organization.

Sincerely,
David Wilson

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**Sample 6**
Position number: 6
Position title: Field Network Consultant
Position slug: field-network-consultant
Name: Laura
Surname: Martinez
Birthdate: 1987-02-15
List of 5 companies: Ericsson, Motorola Solutions, Arista Networks, Zayo Group, Softbank
Key competencies: Client relations, network deployment, site assessment, project management, training

Dear [Hiring Manager's Name],

I am writing to express my interest in the Field Network Consultant role. With extensive experience in deploying and assessing LAN/WAN networks, I am confident in my ability to enhance client satisfaction and deliver results.

At Ericsson, I engaged in various client projects, ensuring successful network deployments while providing training and support. My strong project management skills and proactive client relations have consistently led to successful implementations.

I am thrilled about the opportunity to work with your dynamic team and contribute to your client projects.

Thank you for your consideration.

Kind regards,
Laura Martinez

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Feel free to tailor these samples to better fit the specific job descriptions and requirements of the positions you are targeting!