suppose host a sends two tcp segments back to back to host b over a tcp connection. the first segment has sequence number 90; the second has sequence number 110. a. how much data is in the first segment? b. suppose that the first segment is lost but the second segment arrives at b. in the acknowledgment that host b sends to host a, what will be the acknowledgment
工程项目合同的签订需要一定的程序，它通常包括()几个阶段。
立式机械搅拌反应器搅拌罐体的高径比指罐体圆筒高度与内径之比。()
构成新闻价值的要素有
true or false a. host a is sending host b a large file over a tcp connection. assume host b has no data to send host a. host b will not send acknowledgments to host a because host b cannot piggyback the acknowledgments on data. b. the size of the tcp rwnd never changes throughout the duration of the connection. c. suppose host a is sending host b a large file over a tcp connection. the number of unacknowledged bytes that a sends cannot exceed the size of the receive buffer. d. suppose host a is sending a large file to host b over a tcp connection. if the sequence number for a segment of this connection is m, then the sequence number for the subsequent segment will necessarily be m 1. e. the tcp segment has a field in its header for rwnd. f. suppose that the last samplertt in a tcp connection is equal to 1 sec. the current value of timeoutinterval for the connection will necessarily be ≥ 1 sec. g.suppose host a sends one segment with sequence number 38 and 4 bytes of data over a tcp connection to host b. in this same segment the acknowledgment number is necessarily 42.
because there are both network-layer addresses (for example, internet ip addresses) and link-layer addresses (that is, lan addresses), there is a need to translate between them. for the internet, this is the job of ( ). a. rip b. ospf c. arp d. ip
()是工程建设的最后一道程序，是全面考核设计、施工质量的关键环节，合同双方还将在该阶段进行决算。
what are the layer names and functions on the iso-osi reference model.