计算机专业英语第五章

Background The Internet protocols are the world's most popular open-system (nonproprietary) protocol suite because they can be used to communicate across any set of interconnected networks and are equally well suited for LAN and WAN communications. protocol n.草案，协议 nonproprietary 开放性的 suite 套，组 across 越过，横过 interconnect 使互相连接 communication 信息，通讯 communicate 沟通 The Internet protocols consist of a suite of communication protocols, of which the two best known are the Transmission Control Protocol (TCP) and the Internet Protocol (IP). Transmission Control Protocol 传输控制协议 Internet Protocol 网际协议 Internet Protocol (IP) The Internet Protocol (IP) is a network-layer (Layer 3) protocol that contains addressing information and some control information that enables packets to be routed. network-layer address route IP has two primary responsibilities: providing connectionless, best-effort delivery of datagrams through an internetwork; and providing fragmentation and reassembly of datagrams to support data links with different maximum-transmission unit (MTU) sizes. responsibility n.责任，职责 connectionless 无连接 delivery 传输，递送 datagram 数据包 fragmentation 分裂，破碎 reassembly 重新组装 link n.连结物, 链接 vt.连结；vi.连接起来 maximum n.最大量, 极大 adj.最高的, 最多的, 最大极限的 英语口语练习材料 1.You are going to make it.????你准行！ 2.You are going to win.????你会赢！ 3.You are my only hope.???? 你是我的希望。 4.You are almost there. Keep trying，stick to it.???? 你马上就要成功了，坚持，坚持下去！ 5.You are the best.????你真是顶呱呱！[这是母亲对儿子、女孩对男友常说的话。] 68.You are fantastic.????你太棒了！ The TCP provides reliable transmission of data in an IP environment. TCP corresponds to the transport layer (Layer 4) of the OSI reference model. Among the services TCP provides are stream data transfer, reliability, efficient flow control, full-duplex operation, and multiplexing. TCP offers reliability by providing connection-or