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Sergei Popov
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Cisco Certified Network Associate Routing and Switching (CCNA Routing and Switching)
Cisco
Cisco Certified Network Professional Routing and Switching (CCNP Routing and Switching)
Cisco
Cisco Certified Design Associate (CCDA)
Cisco
Cisco Certified Design Professional (CCDP)
Cisco
Huawei Certified ICT Expert - Routing & Switching (HCIE-Routing & Switching)
Huawei
