The IoT system consists of three layers:, and A: sensing layer B: transport layer C: network layer D: application layer

In the following four descriptions, which one is correct? () A: If<br/>one host’s transport layer uses TCP, then its network layer<br/>must use virtual-circuit network. B: Datagram<br/>network provides connection service C: The<br/>transport-layer connection service is implemented in the router D: The<br/>network-layer connection service is implemented in the router as well<br/>as in the end system.

Point to Point Protocol is a _______________. A: session layer Protocol B: transport layer Protocol C: data link layer Protocol

What is the address of the port on the interface between the Transport Layer and the Application Layer? A: 8-bit B: 16-bit C: 32-bit D: 64-bit

TSL全称为Transport Layer Security，中文为传输层安全。

When an IP packet is Layer 3-switched from a source in one VLAN to a destination in another VLAN,which field in a packet will be rewritten? （） A: Layer 2 TTL B: Layer 3 TTL C: Layer 3 source address D: Layer 3 transport protocol E: Layer 3 destination addre

ISO/OSI七层模型中，提供端到端的透明数据传输服务，差错控制和流量控制的层是（ ） A: Physical Layer B: Network Layer C: Transport Layer D: Session Layer

In the seven-layer OSI network architecture, ( ) layer is on point-to-point basis A: Network B: Transport C: Session D: Application

The _____________ does Not have Session or presentation layer on the top of the transport layer. A: Token Model B: OSI Model C: TCP/IP Model

Which OSI layer handles flow control, data segmentation, and reliability A: Application B: Physical C: Transport D: Data Link