大学MOOC 数字通信原理(海南热带海洋学院)1452145162 最新慕课完整章节测试答案
第一章 数据通信、数据网络和因特网
第4周测试
1、单选题：
Data transferred in the Data Link Layer is in the form
选项：
A: Physical
B: Transport
C: Network Network layer
D: MAC sublayer of the data link layer
答案: 【 Network Network layer】
2、单选题：
Which one of the following networking terms is not associated with the same OSI layer as the others?
选项：
A: Router
B: Packets
C: Tcp
D: IP
答案: 【 Tcp】
3、单选题：
Which of the following functions is not performed by TCP?
选项：
A: Flow control
B: Sequencing
C: Error checking
D: Subnetting
答案: 【 Subnetting】
4、单选题：
Bit synchronization is handled at which layer?
选项：
A: Data link
B: Transport
C: Session
D: Physical
答案: 【 Physical】
5、单选题：
Identify the order of the 5 step encapsulation? 1. Create the segment 2. Convert the Frame to bits 3. Create the packet 4. Create the frame 5. user creates the data
选项：
A: 1,2,4,2,5
B: 2,1,3,4,5,
C: 5,1,3,4,2,
D: 5,3,4,1,2,
答案: 【 5,1,3,4,2,】
6、单选题：
Which layers of the OSI model are included in the lower layers？
选项：
A: Application, Session, Presentation
B: Physical, Transport, Data link, network
C: Data link, physical, Network
D: Session, Data link, Physical
答案: 【 Physical, Transport, Data link, network】
7、单选题：
IP is implemented at which OSI model layer?
选项：
A: Transport
B: Session
C: Data link
D: Network
答案: 【 Network】
8、单选题：
Where is encapsulation used in the osi model?
选项：
A: All seven layers of the receiving station
B: At peer layers of the sending station and receiving station
C: Only at the Network layer
D: At the sending Station
答案: 【 At the sending Station】
9、单选题：
What is the Protocol Data Unit (PDU) employed at the Data Link Layer?
选项：
A: Bits
B: Frames
C: Packets
D: Segments
答案: 【 Frames】
10、单选题：
Which of the following protocols are examples of TCP/IP network access layer protocols?
选项：
A: Ethernet
B: HTTP
C: UDP
D: TCP
答案: 【 Ethernet】
11、单选题：
Transport layer protocols that establish a connection with another node before they begin transmitting data are known as :
选项：
A: Connectionless protocols
B: Syn-oriented protocols
C: Connection-oriented protocols
D: Ask.oriented protocols
答案: 【 Connection-oriented protocols】
12、单选题：
A network layer protocols that reports on the success or failure of data delivery is :
选项：
A: IP
B: TCP
C: ARP
D: ICMP
答案: 【 ICMP 】
13、单选题：
Encryption takes place at which layer?
选项：
A: Application
B: Presentation
C: Session
D: Transport
答案: 【 Presentation】
14、单选题：
Which layer establishes, maintains, and terminates communications between applications located on different devices?
选项：
A: Application
B: Presentation
C: Session
D: Network
答案: 【 Session】
15、单选题：
Which layer uses the Segments as a Protocol Data Unit (PDU)?
选项：
A: Network
B: Physical
C: Data link
D: Transport
答案: 【 Transport】
16、单选题：
Which OSI layer defines the standards for cabling and connection ?
选项：
A: Layer 1
B: Layer 2
C: Layer 3
D: Layer 4
答案: 【 Layer 1】
17、单选题：
Packets are found at which layer?
选项：
A: Data link
B: Transport
C: Network
D: Session
答案: 【 Network】
18、单选题：
What are the OSI layers above and below the Session layer？
选项：
A: Application, presentation, session, transport, network, data link, physical
B: Session, presentation, data transport, MAC, network, physical
C: Physical, data link, network, transport, session, presentation, application
D: Presentation, application, session, network, transport, data link, physical
答案: 【 Application, presentation, session, transport, network, data link, physical】
19、单选题：
What are the OSI layer above and below the Session layer.
选项：
A: Application and Physical layer
B: Application and Session layer
C: Presentation and Transport l