6DD1681-0CA2

交換式結構： 在交換式以太網中，交換機根據收到的數據幀中的MAC地址決定數據幀 應發向交換機的哪個端口。因為端口間的幀傳輸彼此屏蔽，因此節點就 不擔心自己發送的幀在通過交換機時是否會與其他節點發送的幀產生沖 突。 為什么要用交換式網絡替代共享式網絡： ·減少沖突：交換機將沖突隔絕在每一個端口（每個端口都是一個沖突 域），避免了沖突的擴散。 ·提升帶寬：接入交換機的每個節點都可以使用全部的帶寬，而不是各 個節點共享帶寬。

6DD1681-0CA2

聯系人：郭先生
聯系電話：18971415643《優先》
座機：027-83238871
傳真：207-61537051
QQ：810334512《優先》

6DD1681-0CA2

1800年前的漢代，大科學家張衡不僅發明了地動儀，而且發明了計里鼓 車。計里鼓車每行一里，車上木人擊 木馬車 鼓一下，每行十里擊鐘一下。 后漢三國時期，蜀國丞相諸葛亮成功地創造出了“木牛流馬”，并用其 運送軍糧，支援前方戰爭。 1662年，日本的竹田近江利用鐘表技術發明了自動機器玩偶，并在大阪 的道頓堀演出。 1738年，法國天才技師杰克·戴·瓦克遜發明了一只機器鴨，它會嘎嘎 叫，會游泳和喝水，還會進食和排泄。瓦克遜的本意是想把生物的功能 加以機械化而進行醫學上的分析。

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