The Border Gateway Protocol (BGP) is an interautonomous system （） protocol. The primary function of a BGP speaking system is to exchange network （） information with other BGP system. This network reachability information includes information on the list of Autonomous System (ASs) that reachability information traverses. BGP-4 provides a new set of mechanisms for Supporting （） interdomain routing. These mechanisms include support for advertising an IP （） and eliminate the concept of network class within BGP. BGP-4 also introduces mechanisms that allow aggregation of routes, including （） of AS paths. These changes provide support for the proposed supernettting scheme.

These mechanisms include support for advertising an IP （） and eliminate the concept of network class within BGP.

A．prefix

B．suffix

C．infix

D．reflex

依据《股指期货投资者适当性制度操作指引（试行）》的规定，在投资者财务状况评估中，投资者提供的金融类资产证明应当为特定的证明文件，对此，下列说法正确的有（）。

A.投资者提供的股票、基金、期货权益证明应当以加盖证券营业部专用章的对账单、加盖基金公司专用章的基金份额证明、加盖期货公司结算专用章的交易结算单作为相关资产权益证明文件

B.投资者提供的黄金资产证明应当为加盖银行业务章的纸黄金证明文件

C.投资者提供的理财产品（计划）资产证明应当为与商业银行、证券公司、信托公司等机构签署的相关协议或者由上述机构出具的资产证明文件

D.投资者提供的债券资产证明应当为加盖银行或者证券公司专用章的国债、企业债、公司债、可转债等证明文件