雅思证书的颁发机构 - An Overview
The server demands a certification to terminate the incoming TLS link and for mutual authentication with the shopper (see “Communication & Certificates” section earlier mentioned for specifics). 雅思考试和四六级应试考试不同，主要是能力型考试，主要考察，解题+科目能力+词汇+语法+逻辑，所以四、六级