642-825 Exam
Implementing Secure Converged Wide Area Networks
科目编号：642-825
科目名称：Implementing Secure Converged Wide Area Networks
考题数目：212 Q&As
考试是 Cisco 公司的 Implementing Secure Converged Wide Area Networks 认证考试官方代号，Implementing Secure Converged Wide Area Networks 认证作为全球IT领域专家 Cisco 642-825 题库指南，是许多大中IT企业选择人才标准的必备条件。
Exam : Cisco 642-825
Title : Implementing Secure Converged Wide Area Networks
1. Which two statements are true about broadband cable (HFC) systems? (Choose two.)
A. Cable modems only operate at Layer 1 of the OSI model.
B. Cable modems operate at Layers 1 and 2 of the OSI model.
C. Cable modems operate at Layers 1, 2, and 3 of the OSI model.
D. A function of the cable modem termination system (CMTS) is to convert the modulated signal from the cable modem into a digital signal.
E. A function of the cable modem termination system is to convert the digital data stream from the end user host into a modulated RF signal for transmission onto the cable system.
Answer: BD
公司是全球领先的互联网设备供应商。提供业界范围最广的网络硬件、互联网操作系统（IOS）、网络设计和实施等专业技术支持，还提供全球最权威的网络解决方案。
一、适用对象
凡具有DOS、Windows和一定英语水平的在职人员、各大专院校在校学生及要求获得网络关键设备技术知识的人员均可报名参加Cisco培训。通过国际认证考试可获得Cisco国际认证证书。作，必须获得微软的证书。
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