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TCP Connection Management Out of Order and Duplication (复制) Problem Old segment from previous connections to come Use long sequence number (32 bits) E 阅读全文
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UDP unreliable, just add de multiplexing and error checking on data than IP. Best effort datagram(数据报) service Multiplexing enables sharing of IP data 阅读全文
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IPv6 Longer address field : 128 bits can support up to 3.4 x 10^38 hosts Simplified header format : Simpler format to speed up processing of each pack 阅读全文
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DHCP Dynamic Host Configuration Protocol(动态主机配置协议) (RFC 2131) Bootstrap Protocol BOOTP(引导程序协议) allows a diskless(无盘) workstation to be remotely booted 阅读全文
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队列 特点:FIFO,先入先出,插入删除在两段进行(入队出队) 操作: 1. 生成。 2. 判断未满 3. 判断非空 4. 入队 5. 出队 数组实现 一个一维数组 记录头元素位置变量front 记录尾元素位置变量rear 开始时front和rear都是 1。 循环队列 使用求余实现循环 线性数组的 阅读全文
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Address Resolution Protocol IP addresses are said to be logical , because they are defined in terms of logical topology of the routers and end systems 阅读全文
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IP Address Problems IP Address Exhaustion Class A, B, and C address structure inefficient Class B too large for most organizations, but future proof C 阅读全文
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Routing Table Each row in routing table contains: Destination IP address IP address of next hop router Physical address Statistics information Flags H 阅读全文
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Subnet Addressing To better utilize IP address Subnet addressing introduces another hierarchical (分层) level Transparent to remote networks Simplifies 阅读全文
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IP Addressing(处理) Each host on Internet has unique 32 bit IP address Each address has two parts: netid and hostid netid(网络号) is unique & administered( 阅读全文