【正文】
classes. (66) Local bus can increase the data throughput. The bus that is most frequently used is____. A) VESA B) EISA C) MCA D) PCI (67) Most frequently used algorithm f or page replacement is____. A) LRU B) FIFO C) OPT D) PPT (68) The following three concepts are essential to the OSI model:service,interface and____. A) networks B) applications C) protocols D) layers (69) LANs can be connected by using bridges,which operate in the____. A) physical layer B) data link layer C) network layer D) transport layer (70) TCP service is obtained by having both the sender and the receiver create end points,which are called____. A) network address B)supernet address C) socket D) IP address 二、論述題(四個論述題可任選其一,并只選其一,多選無效,滿分30分。如果一臺Internet主機有兩個或多個IP地址,則該主機屬于兩個或多個____。源結(jié)點在發(fā)送幀時需要將詳細的路由信息放在____?! ) 頻帶傳輸 B) 基帶傳輸 C) 寬帶傳輸 D) IP傳輸 (53) 網(wǎng)絡(luò)操作系統(tǒng)的基本 任務(wù):是屏蔽本地資源與網(wǎng)絡(luò)資源的差異性,為用戶提供____。 ?、瘢甀P協(xié)議提供的是面向連接的可靠服務(wù) Ⅱ.TCP協(xié)議提供的是無連接不可靠服務(wù) ?、螅甎DP協(xié)議提供的面向連接的可靠服務(wù) Ⅳ.IP協(xié)議提供的是無連接不可靠服務(wù) A) 全部 B)Ⅰ和Ⅲ C) Ⅱ、Ⅲ和Ⅳ D) Ⅰ、Ⅱ和Ⅲ (51) 城域網(wǎng)設(shè)計的目標是要滿足幾十千米范圍內(nèi)