题目内容
The presentation layer is concerned with the（1） and semantics of the information exchanged between two systems. The processes in two systems are usually exchanginginformation in the form of character（2）numbers, and so on. The information should bechanged to bit （3） before being transmitted. Because different encoding systems, thepresentation layer is responsible for （4）between these different encoding methods. Thepresentation layer at the sender changes the information from its sender-dependent format into acommon format. The presentation layer at the receiving machine changes the common format intoits （5） dependent format. （1）是（）
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The presentation layer is concerned with the（1） and semantics of the information exchanged between two systems. The processes in two systems are usually exchanginginformation in the form of character（2）numbers, and so on. The information should bechanged to bit （3） before being transmitted. Because different encoding systems, thepresentation layer is responsible for （4）between these different encoding methods. Thepresentation layer at the sender changes the information from its sender-dependent format into acommon format. The presentation layer at the receiving machine changes the common format intoits （5） dependent format. （3）是（）
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An internet is a combination of networks connected by （1）. When a datagram goes from a source to a （2）, it will probably pass many（3） until it reaches the routerattached to the destination network. A router receives a （4）from a network and passes it toanother network. A router is usually attached to several networks. When it receives a packet, towhich network should it pass the packet The decision is based on optimization: Which of theavailable（5） is the optimum pathway （1）是（）
A management domain typically contains a large amount of management information. Each individual item of（1）information is an instance of a managed object type. The definition of arelated set of managed （2）types is contained in a Management Information Base(MIB) module. Many such MIB modules are defined. For each managed object type it describes, a MIB（3）defines not only the semantics and syntax of that managed object type, but also the method ofidentifying an individual instance so that multiple （4） of the same managed object type can bedistinguished. Typically, there are instances of each managed object（5） within a managementdomain. （4）是（）
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