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[WJ-400-400]對(duì)于網(wǎng)絡(luò)通信的交換技術(shù),固定電話網(wǎng)絡(luò)使用的是（）

參考答案：電路交換技術(shù)。固定電話網(wǎng)絡(luò)傳統(tǒng)上使用的是電路交換技術(shù)。電路交換是一種通信方式，它在通信雙方之間建立一個(gè)固定的物理連接，這個(gè)連接在整個(gè)通信過程中保持不變。在電路交換網(wǎng)絡(luò)中，當(dāng)兩個(gè)用戶想要進(jìn)行通信時(shí)，網(wǎng)絡(luò)會(huì)為他們分配一條專用的物理通道，這條通道在整個(gè)通話期間被保留，即使在通話雙方不說話的時(shí)候，這條通道也不會(huì)被其他通信使用。這種交換方式在電話網(wǎng)絡(luò)中被廣泛使用，因?yàn)樗梢蕴峁┓€(wěn)定的通信質(zhì)量，但缺點(diǎn)是資源利用率不高，因?yàn)榧词乖谕ㄔ掚p方不傳輸數(shù)據(jù)時(shí)，通道仍然被占用。隨著技術(shù)的發(fā)展，分組交換技術(shù)（如IP網(wǎng)絡(luò)）和包交換技術(shù)（如ATM網(wǎng)絡(luò)）也被用于網(wǎng)絡(luò)通信，它們?cè)跀?shù)據(jù)傳輸時(shí)更加靈活和高效。

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