[CCNP ENARSI] Bidirectional Forwarding Detection (BFD) คืออะไร ??

array(10) { [0]=> object(stdClass)#4298 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "KlZcCZwQCKw" ["related_video_title"]=> string(33) "[CCNP ENARSI] BGP Route Reflector" ["posted_time"]=> string(19) "1 год назад" ["channelName"]=> string(17) "NetPrime Training" } [1]=> object(stdClass)#4271 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "aV-OOu1JYKg" ["related_video_title"]=> string(66) "[Basic/CCNA] Spanning-Tree Protocol ใช้ทำอะไร ??" ["posted_time"]=> string(19) "1 год назад" ["channelName"]=> string(17) "NetPrime Training" } [2]=> object(stdClass)#4296 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "C2UVsyxfBzw" ["related_video_title"]=> string(34) "Bidirectional Forwarding Detection" ["posted_time"]=> string(21) "4 года назад" ["channelName"]=> string(27) "Kevin Wallace Training, LLC" } [3]=> object(stdClass)#4303 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "91gZwPZIJPc" ["related_video_title"]=> string(83) "[Basic/CCNA] หน้าที่ของ Router และการทำ Routing" ["posted_time"]=> string(19) "1 год назад" ["channelName"]=> string(17) "NetPrime Training" } [4]=> object(stdClass)#4282 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "siz69dYUSOA" ["related_video_title"]=> string(156) "EP3 of 5 IP Routing Layer3 ผู้ดูแลระบบเครือข่าย ระบบไอที IT Computer OSI Network Training for Junior" ["posted_time"]=> string(21) "7 дней назад" ["channelName"]=> string(19) "IT Pattana Official" } [5]=> object(stdClass)#4300 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "PYHKOwBfsLI" ["related_video_title"]=> string(82) "Сети для несетевиков // OSI/ISO, IP и MAC, NAT, TCP и UDP, DNS" ["posted_time"]=> string(27) "9 месяцев назад" ["channelName"]=> string(15) "Yuriy Semyenkov" } [6]=> object(stdClass)#4295 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "rE6izEjeRxA" ["related_video_title"]=> string(24) "Chai-each Plugin Example" ["posted_time"]=> string(24) "18 часов назад" ["channelName"]=> string(13) "gleb bahmutov" } [7]=> object(stdClass)#4305 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "me89RMJySAI" ["related_video_title"]=> string(246) "#หนุ่มอนุวัต ตกเป็นผู้ต้องหา เหตุมิจฉาชีพแอบอ้างรูป | คลิปเล่าเรื่อง | สำนักข่าววันนิวส์" ["posted_time"]=> string(19) "1 час назад" ["channelName"]=> string(33) "ข่าวช่องวัน" } [8]=> object(stdClass)#4281 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "6JKAn7JAtNI" ["related_video_title"]=> string(91) "【R&B Relax 40】Healing Playlist / for Chill / Work / Indie / Ballad / Relax / Coffee" ["posted_time"]=> string(25) "4 месяца назад" ["channelName"]=> string(18) "Soul Stories Daily" } [9]=> object(stdClass)#4299 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "mTfJl2HPEO0" ["related_video_title"]=> string(167) "แนะนำการใช้งาน Wi-Fi Explorer หนึ่งใน Wi-Fi Tool ที่ Wireless Engineer ต้องมีติดเครื่อง" ["posted_time"]=> string(19) "1 год назад" ["channelName"]=> string(17) "NetPrime Training" } }