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问题 单项选择题

据《UCP500》规定，信用证上如果未规定有“可转让”条款，这个信用证可视为______。

A．可转让信用证

B．不可转让信用证

C．部分可转让信用证

D．由开证人决定

答案

参考答案：B

单项选择题

在联盟中，关于AS_PATH的说法正确的是（）。

A.联盟内通过AS_CONFED_SEQUENCE防止环路

B.当路由发源于成员AS时，AS_CONFED_SEQUENCE一定会被添加上本地成员AS号

C.发布路由到其它AS时，AS_CONFED_SEQUENCE会被隐藏，但不会被删除

D.向联盟内更新路由时，ASBR会自动添加AS_CONFED_SEQUENCE到AS_PATH里
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单项选择题

In a public-key cryptosystem, (71) encrypted with the public key can only be deciphered with the private key from the same (72) . Conversely, (71) encrypted with the private key can be decrypted only with the public key. Users can make their public keys (73) available or place them at a key distribution center or others to access. However, the private key must be (74) safe. In public-key systems there’s no (75) to find a safe channel for communicating a shared secret key.

A. binarytext B. hypertext C. plaintext D. supertext
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