CCNA系列认证
单选题Which layer of the OSI reference model is responsible for ensuring reliable end-to-end delivery of data?（）A ApplicationB PresentationC SessionD TransportE NetworkF Data-Link
题目
Application
Presentation
Session
Transport
Network
Data-Link
相似问题和答案
第1题：
is the 4th layer of the OSI reference model responsible for reliable network communication between end nodes.
A．Data link layer
B．Session layer
C．Transport layer
D．Application layer
解析：四个选项分别是数据链路层、会话层、传输层和应用层。其中传输层位于OSI七层参考模型中的第四层，其功能之一是为会话层实体提供透明、可靠的数据传输服务。
第2题：
A. Application Layer
B. Presentation Layer
C. Data Link Layer
D. Physical Layer
第3题：
As a CCNA candidate, you will be expected to know the OSI model very well. Which of the following are associated with the application layer (layer 7) of the OSI model? (Choose two)
A. TCP
B. Telnet
C. FTP
D. Ping
E. IP
F. UDP
B,C 解析：Explanation:
The application layer is the top layer of the OSI model and is used to describe the end user applications that can be used over a network.
Layer Name Examples
Application (layer 7) Telnet, HTTP, FTP, WWW browsers, NFS, SMTP gateways, SNMP
Incorrect Answers:
A. TCP resides at layer 4.
D. ARP is a function of the data link layer, which is layer 2.
E. IP is used at layer 3 (network layer).
第4题：
Data transfer is slow between the source and destination. The quality of service requested by the transport layer in the OSI reference model is not being maintained. To fix this issue, at which layer should the troubleshooting process begin?（）
A. presentation
B. session
C. transport
D. network
E. physical
第5题：
A.Layer two
B.Layer four
C.Layer one
D.Layer three
第6题：
A. Application Layer
B. Transport Layer
C. Internet Layer
D. Network Access Layer
第7题：
A.Layer 1
B.Layer 5
C.Layer 6
D.Layer 7
第8题：
Which layer of the OSI reference model is responsible for ensuring reliable end-to-end delivery of data?
A. Application
B. Presentation
C. Session
D. Transport
E. Network
F. Data-Link
D 解析：Explanation:
A key function of the transport layer is to provide connection services for the protocols and applications that run at the levels above it. These can be categorized as either connection-oriented services or connectionless services. Some protocol suites, such as TCP/IP, provide both a connection-oriented and a connectionless transport layer protocol, to suit the needs of different applications.
The transport layer is also the place in the layer stack where functions are normally included to add features to end-to-end data transport. Where network layer protocols are normally concerned with just "best effort" communications, where delivery is not guaranteed. Transport layer protocols are given intelligence in the form. of algorithms that ensure that reliable and efficient communication between devices takes place. This encompasses several related jobs, including lost transmission detection and handling, and managing the rate at which data is sent to ensure that the receiving device is not overwhelmed.
Transmission quality, meaning ensuring that transmissions are received as sent, is so important that some networking references define the transport layer on the basis of reliability and flow-control functions. However, not all transport layer protocols provide these services. Just as a protocol suite may have a connection-oriented and a connectionless transport layer protocol, it may also have one that provides reliability and data management services, and one that does not. Again, this is the case with TCP/IP: there is one main transport layer protocol; TCP, that includes reliability and flow control features, and a second, UDP, that doesn't.
第9题：
A. data link
B. network
C. transport
D. presentation
E. physical
第10题：
A. transport
B. network
C. presentation
D. session
E. application