下列哪种说法正确描述了 Cisco Catalyst 2960 交换机的特征()
A. 它们不支持 IOS 版本早于 15.x 的活动交换虚拟接口 (SVI)
B. 它们最适合用作分布层交换机
C. 它们是模块化交换机
D. 新型 Cisco Catalyst 2960-C 交换机支持 PoE 透传
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网络公司的客户需要为经常出差的员工提供 VPN 连接。为支持 VPN 服务器,必须将客户的路由器升级到带有高级 IP 服务功能集的新版本 Cisco IOS 软件。现场工程师在将新 IOS 复制到路由器之前应该进行什么操作()
A. 设置路由器,使其在下次启动时支持从 TFTP 服务器加载新的 IOS 映像文件
B. 使用 erase flash: 命令删除当前安装的 IOS,然后重新加载路由器
C. 发出 show running-config 命令,查看当前安装的 IOS 映像文件的功能
D. 发出 show version 和 show flash 命令以确保路由器具有足够的存储器和文件空间容纳新的 IOS 映像
(ill at ease)Marcus says that he always feels ill at ease when he’s()
A. listening to the radio
B. playing with his cats
C. on a first date with a girl
D. listening to music
(fresh as a daisy)My grandma said, “I might be ninety years old, but I still feel as fresh as a daisy.” She()
A. looks much older
B. feels much younger
C. sounds much wiser
D. feels much older
(a new lease of life)After winning her battle with cancer, Misha had a new lease of life. She was going to()
A. change the way she made a living
B. worry about her changing life
C. live her life to the full
D. change her life