试题详情
- 单项选择题Why are the 1300 nm and 1550 nm regions of the fiber spectrum primarily used for optical communications?（）
A、They are both regions of lowest loss.
B、They are both regions of low reflections.
C、They are both regions of low index of refraction.
D、They are both regions of low chromatic dispersion.
E、They are both regions of low Polarization Mode Dispersion (PMD).
- A
关注下方微信公众号，在线模考后查看
热门试题
- HSRP has
- SONET Path Terminati
- Given an IP address
- 什么是静态NAT？
- Which command&
- 使用 SSH 连
- Which of
- 白噪声在任意传输速率上强度相等。
- 下列哪些技术有助于减少路由环路？（）
- Which four Cisco Spa
- 以下能唯一显示PostScript填充的
- What is
- 在使用“艺术画笔”工具绘制图形时，能够获
- Study the
- 一局域网有多个服务器，为了完善共享文件管
- 在焊接对象的操作中，若原始对象有重叠部分
- The Cisco UC500 comp
- The TestKing.com adm
- What is
- The ASBR-summa