请参见图示。Switch1在默认的Cisco 2960配置基础上仅添加了如下命令： 假设网络间的路由运行正常且 Switch2 已正确配置了远程访问功能。当在 Switch1 的特权模式下输入telnet 10.0.2.2命令时会产生什么结果？（）
A. 将出现如下提示：User Access Verification Password：
B. Switch2将把目的地不可达的消息返回给Switch1
C. Router1将把目的地不可达的消息返回给Switch1
D. 数据包将被丢弃
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Which of the following two statements about Cisco NSF and SSO are the most relevant to thenetwork designer？ （）
A. You can reduce outage 1 to 3 seconds by using SSO in Layer 2 environment or Cisco NSF withSSO in a Layer 3 environment.
B. SSO and NSF each require the device to either be graceful restart-capable or graceful-aware.
C. In a fully redundant topology adding redundant supervisor a with NSF and SSO may causelonger convergence times than single supervisors with turned IGP times
D. The primary deployment scenario for Cisco NSF with SSO is in the Distribution and Corelayers.
E. Cisco NSF-aware neighbor relationship are independent of any turned IGP times
以下为全文数据库的是（）。
A. proquest
B. cnki
C. 万方
D. 维普
E. pubmed
Refer to the exhibit. Which of the following is an advantage of device clustering utilizing Virtual Port Channels （vPC）？（）
A logical star topology provides a loop free environment so that all links will be used forwardtraffic
B. Enhanced EtherChannel hashing load balancing using the vPC peer link internal to the VPC
C. The control plane functions of the Nexus switches are merged to hide the use of virtualization
D. Neighboring devices connect on a Layer 3 MEC for improved packet forwarding
请参见图示。根据 ping 命令的输出可得出哪两条结论（）
A. 出现了目的地不可达错误
B. 数据包类型未知
C. 一个数据包超时
D. ping中断
E. 成功收到四个数据包
F. 超过了数据包的TTL值
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