【单选题】What is use of Network Layer?
A.
To establish connection
C.
Network layer performs routing.
【简答题】Je ne trouve pas ma clé de voiture. Elle est .
【单选题】What layer of the TMN (telecommunications management network) model does CTM fit into?()
A.
Network management layer
B.
Element management layer
C.
Business management layer
【简答题】If the ozone layer is destroyed by car, what will happen?
【简答题】第三章、北京冬奥会设____个大项,____个分项,____个小项。
【单选题】According to paragraph 3, what is unusual about the suns corona?
A.
It is the outmost layer of the sun's atmosphere and is correspondingly cooler.
B.
It is hotter than the photosphere despite being farther away from the core.
C.
It is 200 times as deep as the photosphere and is most visible to the naked eye.
D.
It is the layer of the sun's atmosphere where energy escapes as sunlight.
【单选题】What is the purpose of the network layer of the OSI seven layer model?
A.
It selects a route for the message, forming segments into packets and adding the header information.
B.
It encodes the packets into the medium that will carry them - such as an analog signal, if the message is going across a telephone line - and sends the packets along that medium.
C.
It translates the message into a language that the receiving computer can understand.
D.
it is the only part of the process a user sees.
【单选题】What architectural layer does a servlet belong to?
A.
The Presentation layer