网络小题练习题：1. In TCP, the acknowledgement number that a host puts in a segment（段）is the sequence（序列，顺序）number of the next byte（字节）the host is expecting from the sender.2. There are two fundamental （基（根）本的）approaches （接近，通往的方法）to moving data through a network of links and switches（交换机）:circuit switching（线路交换） and packet switching（包交换）.有两种基本途径移动数据通过网络的链接和开关:电路交换和分封交换3. Switch（交换机）is usually used to separate（分开，隔开）collisiondomains（碰撞域，冲突域）.开关通常是用来分离冲突域4. The length of an IPv6 address is 128 bits.IPv6的长度的地址是一个128位。
5. Generally, there are two types of network routing（路由选择）algorithms（算法）: distance vector（距离矢量路由协议） and Link State（链路状态路由协议）.一般来说,有两种类型的网络路由算法:距离向量和链路状态6. The network portion（部分，一部分） of an IP address is the same for all the hosts on the same IP network.网络部分(部分,一部分)的一个IP地址是同为所有的主机在同一IP网络7. Compared with Stop-and-Wait（停止等待协议）, which is a non-pipelined reliable data transfer protocol(协议), two pipeline-based reliable data transfer approaches are go-back-n （倒退N协议）and Selective Repeat (SR)（选择重传）.Stop-and-Wait相比,这是一个可靠的数据传送协议爆炸,两pipeline-based可靠的数据传输方法和选择性go-back-n重复(SR)。
8. Two parties often use public-key encryption（数据加密） to agree on ashared one-time symmetric session key.双方同意经常使用公钥加密在分享一次性对称的会话密钥。
9. 10BaseT Ethernet（以太网） use twisted pair（双绞线） copper（铜）as physical media.10 BaseT使用铜绞线以太网物理媒体10. With a datagram（数据报）network layer, each packet carries theaddress of the destination host（目的主机）.与一个相应的网络层,每个包携带目的地主机的地址。
11. In a Link-State routing（路由选择） algorithm（算法）, each node（节点）has a map of the entire network and determines the shortest path from itself to all other nodes in the network.链路状态路由算法中,每个节点有一个地图,它决定了整个网络最短路径从自身所有其他节点的网络。
12. Typically, a wireless（无线的） network with "infrastructure" includesbase stations（基点）.通常情况下,一个无线网络基站的“基础设施”包括13. With non-pipelined persistent mode between the browser（浏览器）and the Web server（服务器）, it is possible for the browser to send two distinct（不同的） HTTP request messages over one TCP connection.持续的模式和爆炸在浏览器和服务器之间,它可能两种截然不同的浏览器发送HTTP请求一个TCP 连接信息。
14. We usually refer to transport layer packets as segments, refer to linklayer packets as frame（一次定格）.我们通常指的是传输层段包,请参阅链路层数据包的帧。
15. There are three general categories of shared media multiple（多重的）access protocols: Channel Partition, random access and Taking Turns.有三个一般类共享介质多址接入协议:通道分离、随机存取和轮流等。
16. The MAC protocol （协议）in 802.11 wireless network is CSMA/CA,and here “CA” stands for collision avoidance（避免碰撞）.AC协议在802.11无线网络CSMA / CA,这里的“CA”代表避碰。
17. For TCP connections with congestion（拥塞）window(CongWin) ofsize W , timeout （超时）triggers（触发器） an another slow-start（慢启动）phase, resulting in Threshold (ssthresh) set to W/2 and CongWin set to 1.TCP连接拥塞窗口(CongWin)大小的W,暂停slow-start触发另一个阶段,导致阈值ssthresh)设置为W / 2和CongWin设置为118. If a Web server has established 5 TCP connections with differentbrowsers（浏览器）, it uses a total of 6 TCP socket(s)（套接字，插口）.如果一个网络服务器建立TCP连接5不同的浏览器,它使用了一个共有六TCP插座(年代)。
19. host-to-host（主机到主机） communication the following functions doesnetwork layer .host-to-host沟通以下功能并网路层20. OSI 7-layer network model is not used by the Internet.七层的OSI网络模型不被互联网21. Hub（集线器） can’t be used to separate collision domains.（冲突域）集线器能不被用来分离冲突域。
22. A UDP socket（套接字，插座，插口）is identified by a 2-tuple: sourceport and source IP address..一个UDP插座经一个2-tuple:源端口和源IP地址。
23. NAT technology could help to save public IP address resource.NAT技术有助于节省公共IP地址资源。
24. the default（默认值）mask（掩码）for class C in CIDR（无类别域间路由） notation？默认的面具在丙级在CIDR符号吗?25. well-known port of SMTP？2526. “Sequence number” is not the field in a typical IP header ？“序列号”不是场在一个典型的IP报头吗?27. we can use SSL to provide transport layer security .我们可以使用SSL提供传输层安全。
28. CSMA/CD is most likely to introduce conflicts（冲突） .CSMA / CD是最有可能引进的冲突29. The protocol stacks implemented at the switch typically consists of 2layers.在协议栈的实现开关典型地由两层。
30. Two important reasons that the Internet is organized as a hierarchy ofnetworks（层次网络） for the purposes of routing（路由选择） are ？两个重要原因,互联网是由一系列的网络路由的目的是什么?31. What is the last address of a block of classless addresses if one of theaddresses is 12.2.2.127/28?什么是最后一次演讲一块阶级地址的如果有一个12.2.2.127/28地址吗?32. The 802.11 protocol does not implement collision detection because…？802.11协议并不实现碰撞检测,因为…?33. In order to show current network connections in your system, youshould use command ？（实验一）为了展示当前网络连接在您的系统,你应该使用命令呢?34. In Selective Repeat ARQ, if packets 0~4 are sent, but only packet 1 isacknowledged, when packet 0 and 2 timeout（超时，暂时休息）simultaneously（同时）, how many packet(s) should be retransmitted？在选择性重复ARQ,如果包0 ~ 4是送去,但是只有包1被确认,当包0和2暂停同时,多少包(s)应被重传?35.Given the following lines from a Java program segment:Socket connectionSocket;ServerSocket listenSocket = new ServerSocket(7890);Which code could be used to establish an incoming connection with a requesting host?给下列线路从java程序:插座connectionSocket;ServerSocket listenSocket =新ServerSocket(7890);哪些代码可以被用来建立一个进料连接在一个请求主人?。