计网
1. (判断题) 111.112.113.114 is a legal IP address
- 翻译: 111.112.113.114 是一个合法的 IP 地址。
- 正确答案: 对
2. (判断题) The Data Link Layer handles frame transmission errors and regulates the flow of data
- 翻译: 数据链路层处理帧传输错误并调节数据流。
- 正确答案: 对
3. (判断题) DAC produces digital audio from a microphone
- 翻译: DAC(数模转换器)从麦克风产生数字音频。
- 正确答案: 错
4. (判断题) The www.ne-uq.edu.cn is NOT a legal domain name.
- 翻译: www.ne-uq.edu.cn 不是一个合法的域名。
- 正确答案: 错
5. (判断题) FTTH broadband relies on deployment of fiber optic cables to provide high data rates customers
- 翻译: FTTH 宽带依赖于光纤电缆的部署,为客户提供高数据速率。
- 正确答案: 对
6. (判断题) A layer provides a service to its horizontal peer layer
- 翻译: 某一层为其水平对等层提供服务。
- 正确答案: 错
7. (判断题) HTTP uses a P2P application structure in computer networks.
- 翻译: HTTP 在计算机网络中使用 P2P(点对点)应用结构。
- 正确答案: 错
8. (判断题) The forwarding table in a router is configured by both intra-AS and inter-AS routing algorithms.
- 翻译: 路由器中的转发表由 AS 内和 AS 间的路由算法配置。
- 正确答案: 对
9. (判断题) A 56-kbps modem calling a computer in the same building has low bandwidth and low latency
- 翻译: 一个 56 kbps 的调制解调器呼叫同一栋楼内的计算机时,具有低带宽和低延迟。
- 正确答案: 对
10. (判断题) A switch is mainly used for data switching, and a router is for routing and forwarding.
- 翻译: 交换机主要用于数据交换,而路由器用于路由和转发。
- 正确答案: 对
11. (判断题) Wireless NICs are usually compatible with multiple physical layer protocols
- 翻译: 无线网卡通常兼容多种物理层协议。
- 正确答案: 对
12. (判断题) A factor in the delay of a store-and-forward packet-switching system is how long it takes to store and forward a packet through a switch
- 翻译: 存储转发分组交换系统的延迟因素之一是通过交换机存储和转发一个分组所需的时间。
- 正确答案: 对
13. (判断题) The www.ne@uq.edu.cn is a legal domain name.
- 翻译: www.ne@uq.edu.cn 是一个合法的域名。
- 正确答案: 错
14. (判断题) Transport layer offers half-connection and full-connection service to applications
- 翻译: 传输层为应用程序提供半连接和全连接服务。
- 正确答案: 错
15. (判断题) Packet Tracer provides a Simulation mode that allows you to create and capture PDUs to check several functions within your network.
- 翻译: Packet Tracer 提供了一种模拟模式,允许您创建和捕获 PDU 以检查网络中的多种功能。
- 正确答案: 对
16. (判断题) The way that the master node invites slave nodes to transmit in turn is called token-passing protocol.
- 翻译: 主节点邀请从节点依次传输的方式称为令牌传递协议。
- 正确答案: 错
17. (判断题) After subnetting, the network is still connected to the Internet through the same router
- 翻译: 划分子网后,网络仍然通过同一路由器连接到互联网。
- 正确答案: 对
18. (判断题) The Network Layer is responsible for delivering packets between endpoints over multiple links
- 翻译: 网络层负责通过多条链路在端点之间传递数据包。
- 正确答案: 对
19. (判断题) Wireless link has more complications compared to wired.
- 翻译: 与有线链路相比,无线链路具有更多的复杂性。
- 正确答案: 对
20. (判断题) A bridge operates as a router in the computer networks
- 翻译: 网桥在计算机网络中作为路由器运行。
- 正确答案: 错
21. (判断题) Sensor networks spread small smart sensor nodes over an area
- 翻译: 传感器网络在一个区域内分布小型智能传感器节点。
- 正确答案: 对
22. (判断题) Each device connected to the Internet must be assigned a unique IP address on an IP network.
- 翻译: 连接到互联网的每个设备必须在 IP 网络上分配一个唯一的 IP 地址。
- 正确答案: 对
23. (判断题) Audio and video have become key types of traffic, e.g., voice over IP, and video streaming
- 翻译: 音频和视频已成为关键类型的流量,例如 IP 语音和视频流。
- 正确答案: 对
24. (判断题) Tablets, laptops, and smart phones are popular network devices
- 翻译: 平板电脑、笔记本电脑和智能手机是流行的网络设备。
- 正确答案: 对
25. (判断题) In RDT 3.0 transmission, the senders may timeout prematurely, and thus some packets are re-transmitted even if they are not lost during previous transmission.
- 翻译: 在 RDT 3.0 传输中,发送方可能会过早超时,因此即使某些数据包在之前的传输中没有丢失,也会被重新传输。
- 正确答案: 对
26. (判断题) A layer talks to its peer using a protocol
- 翻译: 某一层使用协议与其对等层通信。
- 正确答案: 对
27. (判断题) IP address remains the same as a host moves from one network to another.
- 翻译: 当主机从一个网络移动到另一个网络时,IP 地址保持不变。
- 正确答案: 错
28. (判断题) In TCP, the receiver shall ACK the byte after the last byte of the received packet, i.e. the next expected byte.
- 翻译: 在 TCP 中,接收方应确认接收到的数据包的最后一个字节之后的字节,即下一个期望的字节。
- 正确答案: 对
29. (判断题) Properties of wires, fiber, wireless limit what the network can do
- 翻译: 电线、光纤和无线网络的特性限制了网络的功能。
- 正确答案: 对
30. (判断题) DNS transfers pages from servers to browsers
- 翻译: DNS 将页面从服务器传输到浏览器。
- 正确答案: 错
31. (判断题) A machine with a single DNS name can only have one IP address
- 翻译: 具有单一 DNS 名称的机器只能有一个 IP 地址。
- 正确答案: 错
32. (判断题) Generally, a plug-and-play switch does not need to be configured.
- 翻译: 通常,即插即用交换机不需要配置。
- 正确答案: 对
33. (判断题) Computer networks are collections of autonomous computers, e.g., the Internet
- 翻译: 计算机网络是自治计算机的集合,例如互联网。
- 正确答案: 对
34. (判断题) The purpose of the Dynamic Host Configuration Protocol is to get the 48-bit link-layer MAC address associated with a network-layer IP address.
- 翻译: 动态主机配置协议(DHCP)的目的是获取与网络层 IP 地址关联的 48 位链路层 MAC 地址。
- 正确答案: 错
35. (判断题) Hidden terminals are senders that cannot sense each other but nonetheless collide at intended receiver
- 翻译: 隐藏终端是无法感知彼此的发送方,但它们在目标接收方处发生冲突。
- 正确答案: 对
36. (判断题) It is not necessary for a device using the IP protocol to actually have an IP address associated with it.
- 翻译: 使用 IP 协议的设备实际上不必具有与其关联的 IP 地址。
- 正确答案: 错
37. (判断题) Wireless transmission is easy to engineer a fixed data rate over point-to-point links
- 翻译: 在点对点链路上,无线传输很容易设计出固定的数据速率。
- 正确答案: 错
38. (判断题) Error codes add structured redundancy to data so that errors can be either detected, or corrected.
- 翻译: 错误代码为数据添加了结构化的冗余,以便可以检测或纠正错误。
- 正确答案: 对
39. (判断题) To avoid fragmentation and ensure optimal network performance, it is important to ensure that the MTU is configured correctly on all devices on the network.
- 翻译: 为了避免分片并确保最佳网络性能,确保在网络中的所有设备上正确配置 MTU 非常重要。
- 正确答案: 对
40. (判断题) Exposed terminals are senders who can sense each other but still transmit safely (to different receivers)
- 翻译: 暴露终端是可以感知彼此但仍能安全传输(到不同接收方)的发送方。
- 正确答案: 对
41. (判断题) In Link Layer, if the adapter receives a frame with a matching destination address, it will discard the frame immediately.
- 翻译: 在链路层中,如果适配器接收到具有匹配目标地址的帧,它将立即丢弃该帧。
- 正确答案: 错
42. (判断题) On the sending side, the UDP sender will take each application-layer chunk of data written into a UDP socket and send it in a distinct UDP datagram.
- 翻译: 在发送端,UDP 发送方会将写入 UDP 套接字的每个应用层数据块作为单独的 UDP 数据报发送。
- 正确答案: 对
43. (判断题) Flow control means the service will control senders so that the senders do not collectively send more data than links in the network can handle.
- 翻译: 流量控制意味着服务将控制发送方,使发送方不会集体发送超过网络链路处理能力的数据。
- 正确答案: 错
44. (判断题) Firewall protects the internal network by filtering packets
- 翻译: 防火墙通过过滤数据包来保护内部网络。
- 正确答案: 对
45. (判断题) Packet switching is commonly used in traditional telephone networks.
- 翻译: 分组交换通常用于传统电话网络。
- 正确答案: 错
46. (判断题) There can be times when the channel is idle, when a node has a frame to send, but is prevented from doing so by the medium access protocol.
- 翻译: 有时信道可能处于空闲状态,当节点有帧要发送时,但由于介质访问协议的阻止而无法发送。
- 正确答案: 对
47. (判断题) Dynamic web pages are simply files that have the same contents for each viewing
- 翻译: 动态网页是每次查看时内容相同的文件。
- 正确答案: 错
48. (判断题) The Internet has an “hourglass” architecture.
- 翻译: 互联网具有“沙漏”架构。
- 正确答案: 对
49. (判断题) The wireless NIC on your mobile phone should be compatible with 802.11 protocol
- 翻译: 您手机上的无线网卡应与 802.11 协议兼容。
- 正确答案: 对
50. (判断题) In the SSID list, an easy-to-understand SSID helps users to easily find the wireless network to access.
- 翻译: 在 SSID 列表中,易于理解的 SSID 有助于用户轻松找到要访问的无线网络。
- 正确答案: 对
51. (判断题) The HTTP GET request message is used by a web client to request a web server to send the requested object from the server to the client.
- 翻译: HTTP GET 请求消息用于 Web 客户端请求 Web 服务器将请求的对象从服务器发送到客户端。
- 正确答案: 对
52. (判断题) A transcontinental fiber link might have many gigabits/sec of bandwidth, but the latency will also be high due to the speed of light propagation over thousands of kilometers
- 翻译: 跨大陆光纤链路可能具有每秒数千兆比特的带宽,但由于光在数千公里距离上的传播速度,延迟也会很高。
- 正确答案: 对
53. (判断题) Reference models describe the layers in a network architecture
- 翻译: 参考模型描述了网络架构中的各层。
- 正确答案: 对
54. (判断题) A top-level domain typically represents either an organization type or a geographical location.
- 翻译: 顶级域名通常代表组织类型或地理位置。
- 正确答案: 对
55. (判断题) Internet is an interconnected collection of many networks that is held together by the protocols
- 翻译: 互联网是由协议连接在一起的许多网络的互联集合。
- 正确答案: 对
56. (判断题) Cut-through switches have an advantage over store-and-forward switches with respect to damaged frames
- 翻译: 直通交换机在处理损坏帧方面比存储转发交换机具有优势。
- 正确答案: 错
57. (判断题) The hardware plays a decisive role in the topology of the network.
- 翻译: 硬件在网络拓扑中起决定性作用。
- 正确答案: 错
58. (判断题) VPN splits one physical LAN into multiple logical LANs to ease management tasks
- 翻译: VPN 将一个物理 LAN 分割成多个逻辑 LAN 以简化管理任务。
- 正确答案: 错
59. (判断题) Suppose that a host in the NEUQ dormitory sends an IP datagram destined to host www.uts.edu.au. The source port is 3376, and the destination port is 80. And the NAT shall change the source port in order to accomplish the task.
- 翻译: 假设 NEUQ 宿舍中的一台主机发送一个目的地址为 www.uts.edu.au 的 IP 数据报。源端口为 3376,目标端口为 80。NAT 需要更改源端口以完成任务。
- 正确答案: 对
60. (判断题) Static web pages are generated by programs running at the server and the pages vary each time.
- 翻译: 静态网页是由服务器上运行的程序生成的,每次页面内容都会变化。
- 正确答案: 错
61. (判断题) Packet Tracer has the physical workspace that allows you to make your network more realistic by adding backgrounds, buildings, and wiring closets.
- 翻译: Packet Tracer 提供了物理工作区,允许您通过添加背景、建筑物和布线柜使您的网络更加逼真。
- 正确答案: 对
62. (判断题) TCP/IP is a principled, international standard, seven layer model to connect different systems
- 翻译: TCP/IP 是一个原则性的国际标准,七层模型用于连接不同的系统。
- 正确答案: 错
63. (判断题) 111.222.333.444 is a legal IP address
- 翻译: 111.222.333.444 是一个合法的 IP 地址。
- 正确答案: 错
64. (判断题) The performance of a client-server system is strongly influenced by two major network characteristics: the bandwidth of the network and the latency
- 翻译: 客户端-服务器系统的性能受两个主要网络特性的强烈影响:网络带宽和延迟。
- 正确答案: 对
65. (判断题) It is possible for two TCP segments with source port 80 to be sent by the sending host to different clients.
- 翻译: 发送主机可以将源端口为 80 的两个 TCP 段发送给不同的客户端。
- 正确答案: 对
66. (判断题) "Best effort" means a guarantee that all segments of data will actually get there.
- 翻译: “尽力而为”意味着保证所有数据段都能实际到达。
- 正确答案: 错
67. (判断题) DNS namespace is hierarchical from the root down
- 翻译: DNS 命名空间从根向下是分层的。
- 正确答案: 对
68. (判断题) CDNs scale Web servers by having clients get content from a nearby CDN node (cache)
- 翻译: CDN 通过让客户端从附近的 CDN 节点(缓存)获取内容来扩展 Web 服务器。
- 正确答案: 对
69. (判断题) Different CRC generator polynomials have different error detection capabilities.
- 翻译: 不同的 CRC 生成多项式具有不同的错误检测能力。
- 正确答案: 对
70. (判断题) All of the spectrum is carefully divided, and its use should be licensed
- 翻译: 所有频谱都被仔细划分,其使用应获得许可。
- 正确答案: 错
71. (判断题) Pages are named with URLs in the World Wide Web
- 翻译: 在万维网中,页面通过 URL 命名。
- 正确答案: 对
72. (判断题) Link layer accepts packets from the network layer, and encapsulates them into frames
- 翻译: 链路层从网络层接收数据包,并将其封装成帧。
- 正确答案: 对
73. (判断题) The error detection and correction bits add redundancy to the computer networks.
- 翻译: 错误检测和纠正位为计算机网络增加了冗余。
- 正确答案: 对
74. (判断题) A river is duplex.
- 翻译: 河流是双工的。
- 正确答案: 错
75. (判断题) A cookie is a code used by a server, carried on a client’s HTTP request, to access information the server had earlier stored about an earlier interaction with this Web browser.
- 翻译: Cookie 是服务器使用的一种代码,通过客户端的 HTTP 请求携带,用于访问服务器之前存储的与该 Web 浏览器的早期交互信息。
- 正确答案: 对
76. (判断题) Computer network security concerns a variety of threats and defenses across all layers
- 翻译: 计算机网络安全涉及各层的多种威胁和防御措施。
- 正确答案: 对
77. (判断题) Ethernet is a wireless network communication technology based on IEEE 802.11.
- 翻译: 以太网是一种基于 IEEE 802.11 的无线网络通信技术。
- 正确答案: 错
- 答案解析: Wi-Fi
78. (判断题) In the typical C/S paradigm, there is a server with a well-known server IP address or domain name.
- 翻译: 在典型的客户端/服务器(C/S)范式中,存在一个具有知名服务器 IP 地址或域名的服务器。
- 正确答案: 对
79. (判断题) Most traffic of the computer network is content from data centers
- 翻译: 计算机网络的大部分流量来自数据中心的内容。
- 正确答案: 对
80. (判断题) In some networks, the data link layer handles transmission errors by requesting that damaged frames be retransmitted
- 翻译: 在某些网络中,数据链路层通过请求重传损坏的帧来处理传输错误。
- 正确答案: 对
81. (判断题) The default mode for Packet Tracer is Realtime mode.
- 翻译: Packet Tracer 的默认模式是实时模式。
- 正确答案: 对
82. (判断题) The header of the first segment after fragmentation is the same as the last segment's header.
- 翻译: 分片后第一个段的头部与最后一个段的头部相同。
- 正确答案: 错
83. (判断题) If a mobile user moves into a cell, all of whose frequencies are currently in use, the user’s call must be terminated
- 翻译: 如果移动用户进入一个所有频率都被占用的蜂窝,用户的通话必须终止。
- 正确答案: 对
84. (判断题) A pipelined sender can have transmitted multiple packets for which the sender has yet to receive an ACK from the receiver.
- 翻译: 流水线发送方可以发送多个数据包,但尚未收到接收方的确认(ACK)。
- 正确答案: 对
1. (单选题) ____ can be used to flag specific services
- 翻译: ____ 可用于标记特定服务。
- 选项:
- A. OS Types
- B. CPU Types
- C. MAC Addresses
- D. Ports
- 正确答案: D: Ports
2. (单选题) Finding the IP address for a given hostname is called ____ and is done with the DNS protocol.
- 翻译: 查找给定主机名的 IP 地址称为 ____,并通过 DNS 协议完成。
- 选项:
- A. resolution
- B. discovery
- C. framing
- D. routing
- 正确答案: A: resolution
3. (单选题) Approach to structuring network applications are C/S and ( ).
- 翻译: 构建网络应用的方法是 C/S 和 ( )。
- 选项:
- A. A/S
- B. B/S
- C. PPP
- D. P2P
- 正确答案: D: P2P
4. (单选题) What protocol is used for WLAN ____
- 翻译: WLAN 使用什么协议 ____
- 选项:
- A. 802.11
- B. 802.3
- C. 802.8
- D. 802.5
- 正确答案: A: 802.11
5. (单选题) The TCP TimeoutInterval should be set to the value of ( ).
- 翻译: TCP 超时间隔应设置为 ( ) 的值。
- 选项:
- A. DevRTT
- B. SampleRTT
- C. EstimatedRTT+4*DevRTT
- D. EstimatedRTT+DevRTT
- 正确答案: C: EstimatedRTT+4*DevRTT
6. (单选题) ( ) is the largest amount of data that can be transmitted in a single packet on a network.
- 翻译: ( ) 是网络中单个数据包可以传输的最大数据量。
- 选项:
- A. AS
- B. QoS
- C. MTU
- D. TPDU
- 正确答案: C: MTU
7. (单选题) What is Wrong about the Ethernet?
- 翻译: 关于以太网,以下哪项是错误的?
- 选项:
- A. The CSMA/CA mechanism is used.
- B. Ethernet was originally designed to connect computers and digital devices (e.g. printers) through a shared physical line.
- C. Ethernet uses passive media to transmit information.
- D. It transmits information in broadcast mode.
- 正确答案: A: The CSMA/CA mechanism is used.
- 答案解析: The CSMA/CD mechanism is used.
8. (单选题) Which DNS server is contacted first?
- 翻译: 首先联系哪个 DNS 服务器?
- 选项:
- A. TLD
- B. Local
- C. Root
- D. None of the rest is correct
- 正确答案: B: Local
9. (单选题) Ten signals, each requiring 4000 Hz, are multiplexed onto a single channel using FDM. What is the minimum bandwidth required for the multiplexed channel? Assume that the guard bands are 400 Hz wide.____
- 翻译: 使用 FDM 将十个信号(每个需要 4000 Hz)复用到单个信道上。假设保护带宽为 400 Hz,复用信道所需的最小带宽是多少?____
- 选项:
- A. 43600Hz
- B. 40400Hz
- C. 40000Hz
- D. 44000Hz
- 正确答案: A: 43600Hz
10. (单选题) ( ) are rules used by routers to maintain routing tables, such as discovering routes, generating routing entries, and guiding packet forwarding.
- 翻译: ( ) 是路由器用于维护路由表的规则,例如发现路由、生成路由条目和指导数据包转发。
- 选项:
- A. Self-learning algorithms
- B. DNS
- C. Routing protocols
- D. Stop-and-Wait algorithms
- 正确答案: C: Routing protocols
11. (单选题) ____ resolves high-level human readable names for computers to low-level IP addresses
- 翻译: ____ 将计算机的高级人类可读名称解析为低级 IP 地址。
- 选项:
- A. DDoS
- B. DNS
- C. NAT
- D. ARP
- 正确答案: B: DNS
12. (单选题) ____ provides support for sending real-time media over UDP
- 翻译: ____ 提供通过 UDP 发送实时媒体的支持。
- 选项:
- A. PPP
- B. OSPF
- C. BGP
- D. RTP
- 正确答案: D: RTP
13. (单选题) In TCP congestion avoidance process, when should the exponential increase switch to linear?
- 翻译: 在 TCP 拥塞避免过程中,指数增长何时应切换到线性增长?
- 选项:
- A. cwnd<ssthresh
- B. cwnd=ssthresh
- C. cwnd=ssthresh+4*MSS
- D. cwnd≥ssthresh
- 正确答案: D: cwnd≥ssthresh
14. (单选题) This definition below refers to ( ).
Taking data from the layer above, adding header fields appropriate for this layer, and then placing the data in the payload field of the “packet” for that layer.
-
翻译: 以下定义指的是 ( )。
从上层获取数据,添加适合该层的头字段,然后将数据放入该层“数据包”的有效载荷字段中。
-
选项:
- A. encapsulation
- B. modulation
- C. demodulation
- D. multiplexing
-
正确答案: A: encapsulation
15. (单选题) Suppose the algorithms used to implement the operations at layer k is changed. Which layer(s) needs to be reimplemented?____
- 翻译: 假设用于实现第 k 层操作的算法发生了变化。哪些层需要重新实现?____
- 选项:
- A. k+1 and k-1
- B. None
- C. k-1
- D. k+1
- 正确答案: B: None
16. (单选题) The first and last assignable addresses in the subnet where the host 168.16.84.24/20 is located are ( ).
- 翻译: 主机 168.16.84.24/20 所在子网中第一个和最后一个可分配地址是 ( )。
- 选项:
- A. 168.16.80.1,168.16.84.254
- B. 168.16.84.1,168.16.84.254
- C. 168.16.80.1,168.16.95.254
- D. 168.16.84.1,168.16.95.254
- 正确答案: C: 168.16.80.1,168.16.95.254
17. (单选题) Which generations of mobile telephone systems provides analog voice and digital data communication? ____
- 翻译: 哪一代移动电话系统提供模拟语音和数字数据通信? ____
- 选项:
- A. 1G
- B. 3G
- C. 2G
- D. 4G
- 正确答案: B: 3G
18. (单选题) Which one of the following delays depends on the link distance?
- 翻译: 以下哪种延迟取决于链路距离?
- 选项:
- A. Transmission delay
- B. Processing delay
- C. Queueing delay
- D. Propagation delay
- 正确答案: D: Propagation delay
19. (单选题) What is NOT the advantage of fiber optics over copper as a transmission medium?____
- 翻译: 光纤作为传输介质相对于铜缆的哪一项不是优势?____
- 选项:
- A. Much higher cable strength
- B. Thin and lightweight
- C. Not affected by power surges
- D. Much higher bandwidth
- 正确答案: A: Much higher cable strength
20. (单选题) What is the reason for using layered protocols?____
- 翻译: 使用分层协议的原因是什么?____
- 选项:
- A. The system cost is very low.
- B. Protocols can be changed without affecting higher or lower ones.
- C. The system is very easy to implement.
- D. The performance is likely to be worse than a monolithic system.
- 正确答案: B: Protocols can be changed without affecting higher or lower ones.
21. (单选题) Which of the following quality-of-service guarantees are part of the Internet’s best-effort service model?
- 翻译: 以下哪项服务质量保证是互联网尽力而为服务模型的一部分?
- 选项:
- A. Guaranteed delivery from sending host to receiving host.
- B. A minimum bandwidth.
- C. No guarantees at all.
- D. In-order datagram payload delivery to the transport layer.
- 正确答案: C: No guarantees at all.
22. (单选题) The key problem of ____ is to send digital bits using only analog signals
- 翻译: ____ 的关键问题是仅使用模拟信号发送数字比特。
- 选项:
- A. Application Layer
- B. Network Layer
- C. Transport Layer
- D. Physical Layer
- 正确答案: D: Physical Layer
23. (单选题) Which technology has the maximum bandwidth?
- 翻译: 哪种技术具有最大带宽?
- 选项:
- A. XDSL
- B. FTTH
- C. Coax
- D. Modem
- 正确答案: B: FTTH
24. (单选题) “AS” in computer networks refers to ( ).
- 翻译: 计算机网络中的“AS”指的是 ( )。
- 选项:
- A. Autonomous System
- B. Applied System
- C. Amplified System
- D. All-in-one Subnet
- 正确答案: A: Autonomous System
25. (单选题) Companies use networks and computers for resource sharing with the ____ model
- 翻译: 使用网络和计算机通过 ____ 模型进行资源共享。
- 选项:
- A. DSL
- B. Client-Server
- C. VoIP
- D. Peer-to-Peer
- 正确答案: B: Client-Server
26. (单选题) ___ is a private WAN built from virtual links that run on top of the Internet.
- 翻译: ___ 是一种建立在互联网之上的虚拟链路组成的私有广域网。
- 选项:
- A. WiFi
- B. VPN
- C. VLAN
- D. WLAN
- 正确答案: B: VPN
27. (单选题) How many TCP connections does FTP use to complete the transfer of files while working?
- 翻译: FTP 在工作时完成文件传输需要使用多少个 TCP 连接?
- 选项:
- A. 2
- B. 4
- C. 1
- D. 3
- 正确答案: A: 2
28. (单选题) Which is the legal IP address ____
- 翻译: 以下哪个是合法的 IP 地址 ____
- 选项:
- A. 202.0.40.570
- B. 32.230.100
- C. 192.112.36.25
- D. 128.174.5.6.15
- 正确答案: C: 192.112.36.25
29. (单选题) ____ has enormous bandwidth (THz), tiny signal loss and high rates over long distances
- 翻译: ____ 具有巨大的带宽(THz)、极小的信号损失和在长距离上的高速率。
- 选项:
- A. Coaxial Cable
- B. Twisted Pair
- C. Power Line
- D. Fiber
- 正确答案: D: Fiber
30. (单选题) The protocol to reliably communicate data from a sender to a receiver over a channel that can lose or corrupt packets in either direction should be ( ).
- 翻译: 在可能丢失或损坏数据包的信道上,可靠地从发送方到接收方传输数据的协议应该是 ( )。
- 选项:
- A. RDT 2.1
- B. RDT 2.0
- C. RDT 3.0
- D. RDT 1.0
- 正确答案: C: RDT 3.0
31. (单选题) Based on the knowledge learnt from the subject, what command should be used to display the information in the picture?
- 翻译: 根据所学知识,应该使用什么命令来显示图片中的信息?
- 选项:
- A. display cpu-usage
- B. display version
- C. display ip routing-table
- D. display memory-usage
- 正确答案: C: display ip routing-table
32. (单选题) The default subnet mask for Class-B IP address is ____
- 翻译: B 类 IP 地址的默认子网掩码是 ____
- 选项:
- A. 255.255.0.0
- B. 255.255.255.0
- C. 255.255.255.255
- D. 255.0.0.0
- 正确答案: A: 255.255.0.0
33. (单选题) ____ is responsible for delivering data across networks with the desired reliability or quality
- 翻译: ____ 负责以所需的可靠性或质量跨网络传输数据。
- 选项:
- A. Physical
- B. Application
- C. Data Link
- D. Transport
- 正确答案: D: Transport
34. (单选题) The purpose of Cache is to
- 翻译: 缓存的目的是
- 选项:
- A. Reduce response time
- B. Reduce bandwidth on access link
- C. Increase bandwidth on access link
- D. Increase response time
- 正确答案: A: Reduce response time
35. (单选题) Which of these protocols is NOT collision-free?
- 翻译: 以下哪种协议不是无冲突的?
- 选项:
- A. Polling
- B. CSMA/CD
- C. Token-passing
- D. FDMA
- 正确答案: B: CSMA/CD
36. (单选题) The basic function implemented by the FTP protocol is:
- 翻译: FTP 协议实现的基本功能是:
- 选项:
- A. Domain name resolution
- B. Email service
- C. File transfer
- D. Network management
- 正确答案: C: File transfer
37. (单选题) ____ splits one physical LAN into multiple logical LANs to ease management tasks
- 翻译: ____ 将一个物理 LAN 分割成多个逻辑 LAN 以简化管理任务。
- 选项:
- A. VPN
- B. VLAN
- C. CDMA/CA
- D. WLAN
- 正确答案: B: VLAN
38. (单选题) ____ is the Interior Routing Protocol
- 翻译: ____ 是内部路由协议。
- 选项:
- A. OSPF
- B. BGP
- C. PPP
- D. NAT
- 正确答案: A: OSPF
39. (单选题) Suppose there is a change in the service (set of operations) provided by layer k. Which layer(s) needs to be reimplemented?____
- 翻译: 假设第 k 层提供的服务(操作集)发生了变化。哪些层需要重新实现?____
- 选项:
- A. k+1 and k-1
- B. None
- C. k-1
- D. k+1
- 正确答案: D: k+1
40. (单选题) If process A want to communicate with process B on a different host, A should identifies B with____
- 翻译: 如果进程 A 想与不同主机上的进程 B 通信,A 应该通过 ____ 来标识 B。
- 选项:
- A. process B's process ID (PID)
- B. IP address of process B's host + port number that process B binds to
- C. IP address of process B’s host
- D. the socket created by process B
- 正确答案: B: IP address of process B's host + port number that process B binds to
41. (单选题) Which of the following protocols can NOT be used for email transfer?
- 翻译: 以下哪种协议不能用于电子邮件传输?
- 选项:
- A. TCP
- B. UDP
- C. IMAP
- D. SMTP
- 正确答案: B: UDP
42. (单选题) In RDT, ( ) lets the sender know that a packet was NOT received correctly at the receiver.
- 翻译: 在 RDT 中,( ) 让发送方知道接收方未正确接收数据包。
- 选项:
- A. Checksum
- B. NAK
- C. NCK
- D. ACK
- 正确答案: B: NAK
43. (判断题) Exposed terminals are senders who can sense each other but still transmit safely (to different receivers)
- 翻译: 暴露终端是可以感知彼此但仍能安全传输(到不同接收方)的发送方。
- 选项:
- A. 对
- B. 错
- 正确答案: 对
44. (单选题) ____ joins multiple IP prefixes into a single larger prefix to reduce routing table size
- 翻译: ____ 将多个 IP 前缀合并为一个更大的前缀以减少路由表大小。
- 选项:
- A. Subnetting
- B. Aggregation
- C. Tunneling
- D. Packet Fragmentation
- 正确答案: B: Aggregation
45. (单选题) 日前,《中华人民共和国国民经济和社会发展第十四个五年规划和2035年远景目标纲要》(下称《纲要》)发布,提出建设推动建设制造强国、______、数字中国,赋能实体经济高质量发展。
- 翻译: 近日,《中华人民共和国国民经济和社会发展第十四个五年规划和2035年远景目标纲要》(以下简称《纲要》)发布,提出建设推动制造强国、______、数字中国,赋能实体经济高质量发展。
- 选项:
- A. 网络大国
- B. 网络强国
- C. 信息大国
- D. 产业链强国
- 正确答案: B: 网络强国

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