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

Flow control is one of the basic functions of the data link layer. Regarding flow control, which one is correct among following statements? A: Only the data link layer has flow control B: Not only the data link layer has flow control, but the flow control objects of each layer are the same C: Not only does the data link layer have flow control, but the flow control objects of each layer are different D: None of the above is right

The WDM transmission network consists of three layers: Physical Layer、Data Link Layer and Network Layer.

如下图，一名管理员ping默认网关发现如下输出，最有可能是那一层OSI出问题？（） A: data link layer B: application layer C: access layer D: session layer E: network layer

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

Bridges can interconnect two networks using different data link layer protocols, different transmission media and different transmission rates.

An<br/>ARP query packet is encapsulated in ____ A: a link-layer frame addressed<br/>to a specific adapter B: an IP datagram C: a link-layer broadcast frame D: none of the above

What is the name of a link-layer packet? （ ） A: message B: segment C: datagram D: frame

LI layer and LII layer of tissue generation layer are both a layer of cells.

Which layer of the cerebral cortex is the major input layer? A: (A) layer I B: (B) layer II-III C: (C) layer IV D: (D) layer V