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软工计网资料料料料料料料
资源介绍:
软工计网资料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料料
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西安电子科技大学
考试时间 120 分钟
试 题
题号
一
选择题
二、计算和应用题
总分
1
2
3
4
5
6
分数
1.考试形式：闭卷 开卷 ； 2.本试卷共二大题，满分 100 分；
3.
考试日期： 2022 年 月 日； (答题内容请写在装订线外)
I. 单选题（1.5 分每个，共计 30 分）
1. In the following description of the functions of each OSI layer, the INcorrect statement
is .
A. The physical layer uses the transmission medium to transmit bit sequence.
B. The data
link layer makes the error physical line into an error free data link.
C. The network layer has the functions of routing, packet forwarding, error control and so on.
D. The transport layer provides reliable "end-to-end" communication services.
2. For a bandpass signal with a bandwidth of 100kHz and a minimum frequency of 150kHz,
which of the following is its Nyquist sampling rate?
A. 200k samples/s B. 300k samples/s C. 400k samples/s D. 500k samples/s
3. The INcorrect statement in the following description is .
A. Transmission rate refers to the number of binary bits that the transmission system can
transmit per second.
B. Transmission rate is one of the important technical parameters to describe data
transmission system.
C. The unit of propagation rate is bit/s.
班级： 姓名： 学号： 任课教师：
装
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D. The propagation rate is related to distance.
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4. An analog data encoding method that represents number 0 and 1 by changing the amplitude
of the carrier signal is called .
A. ASK B. FSK C. PSK D. PCM
5. Which of the following addresses is a multicast address?
A. 10.2.3.4 B. 202.38.214.2 C. 192.168.215.6 D. 224.38.26.9
6. Which of the following statements is INcorrect?
A. OSPF protocol is an intra domain routing protocol.
B. The core function of OSPF protocol is the network topology database, which generates the
routing table.
C. OSPF is an inter domain routing protocol.
7. Which of the following fields is UNrelated to fragmentation and reorganization of IP
packets? .
A. Identification B. Flags C. Fragmentation offset D. Survival time
8. The application PING sends message.
A. TCP request B. TCP response C. ICMP request D. ICMP response
9. When a host moves from one network to another network with a different network address,
which of the following statement is correct?
A. IP address will change.
B. MAC address will change.
C. Both IP address and MAC address will change.
D. Neither IP address nor MAC address will
change.
D.SPF uses flooding to spread link state packets.
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.
B. resolving physical address to IP address
D. resolving IP address to host name
10. The main function of ARP protocol is
A. resolving IP address to physical address
A. IP packets can be fragmented by the source host and reorganized by routers.
B. IP packets ca
n be fragmented by routers and reorganized by the destination host.
C. IP packets can be fragmented and reorganized by intermediate routers.
D. IP packets can be fragmented by intermediate routers and reorganized by the last router.
12. A department applied for a class C address to divide into 16 subnets with the same number
of addresses. The subnet mask should be
A. 255.255.255.0 B. 255.255.255.192
.
C. 255.255.255.240 D. 255.255.255.255
13. A TCP connection has established between host A and host B. Host A sends two TCP
segments to host B, including 400 bytes and 500 bytes of data respectively. The sequence
number of the first segment is 300. Host B correctly received the two segments and sends the
acknowledgment to host A, and the acknowledgment number is .
A. 700 B. 800 C. 900 D. 1200
14. Host A expects to establish a TCP connection with host B by sending a TCP segment
(SYN=1, seq=2021). If host B accepts the connection request, which of the following could be
the correct TCP when host B sending back to host A?
A. SYN=0, ACK=0, seq=1234, ack=2022
B. SYN=1, ACK=1, seq=24689, ack=2022
C. SYN=1, ACK=1, seq=12340, ack=2021
D. SYN=1, ACK=0, seq=8734, ack=2021
C. resolving host name to IP address
1
1
. Which of the following statement is correct?
资源文件列表:
软工计网资料.zip 大约有4个文件
2021软工计网.pdf 3.6MB
- 44B89B197032F2F124352FB021437DBE.jpg 58.16KB
- 软工计网复习指南.pdf 1.98MB
- 2021-计网.pdf 5.67MB
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