1769-L31
在IP網絡中TCP/IP 傳送方法有3 種: 單播, 播送, 組播.
傳統(tǒng)的單播和播送的通信方法均不能以zui小的網絡開支完成單點發(fā)送、多點接納的疑問,IP 組播技能的呈現(xiàn)及時處理了這個疑問。
相比單播來說,組播的優(yōu)勢在于:因為被傳遞的信息在距信息源盡可能遠的網絡節(jié)點才開端被仿制和分發(fā),所以用戶的添加不會致使信息源負載的加劇以及網絡資源耗費的明顯添加。
相比播送來說,組播的優(yōu)勢在于:因為被傳遞的信息只會發(fā)送給需求該信息的接納者,所以不會形成網絡資源的糟蹋,并能提高信息傳輸?shù)陌踩?別的,播送只能在同一網段中進行,而組播能夠完成跨網段的傳輸。
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