xx年上半年軟考網(wǎng)絡(luò)工程師試題和解析(上午、下午-資料下載頁(yè)
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【正文】 ●下面有關(guān) RMON 的論述中，錯(cuò)誤的是 (70)。 (70) A. RMON 的管理信息庫(kù)提供整個(gè)子網(wǎng)的管理信息 B. RMON 的管理信息庫(kù)屬于 MIB2 的一部分 C. RMON 監(jiān)視器可以對(duì)每個(gè)分組進(jìn)行統(tǒng)計(jì)和分析 D. RMON 監(jiān)視器不包含 MIB2 的功能 答 案： D ● The TCP protocolis a (71) layer protocol. Each connection connects two TCPs that may be just one physical work apart or located on opposite sides ofthe globe. In other words, each connection creates a (72) witha length that may be totally different from another path created by another connection. This means that TCP cannot use the same retransmission time for all connections. Selecting afixed retransnussion time for all connections can result in serious consequences. Ifthe retransmission time does not allow enough time for a (73) to reach the destination and an acknowledgment to reach the source, it can result in retransmission of segments that are still on the way. Conversely, if the retransnussion time is longer than necessary for a short path, it may result in delay for the application for one single connection, the retransmission time should not be connection may be able to send segments and receive (74)faster during nontraffic period than during congested periods. TCP uses the dynamic retransmission time,a transmission time is different for each connection and which may be changed during the same connection. Retransmission time can be made(75) by basing it on the roundtrip time (RTT). Several formulas are used for this purpose. (71) (72) (73) (74) (75) 答案： C,A,B,C,D 2020 年上半年計(jì)算機(jī)技術(shù)與軟件專(zhuān)業(yè)技術(shù)資格 (水平 )考試 《網(wǎng)絡(luò)工程師》試卷 下午試卷： 最后一題中問(wèn)題 1的第 5 空改為 才是正確的， 5
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