正确答案: B

ctrl+z

题目：路由器当前的模式为“端口模式”，要退回到“特权模式”，应该使用的快捷键为（）

解析：B

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举一反三的答案和解析：

[单选题]PPP工作在OSI的哪一层（）

数据链路层

[多选题]You have just installed a new web server on the Ezonexam network. You are required to ensure that the web server is accessible from the Internet. The network uses private addressing, so an IP-to-registered address mapping is required.To do this, you enter the following command:

Ezonexam(config) ip nat inside source static 192.168.2.1

The interfaces must be configured for NAT.

解析：解析：Explanation:

[单选题]关于帧中继的说法，正确的是（）

可以偷占带宽

[单选题]The IP network 210.106.14.0 is subnetted using a /24 mask. How many usable networks and host addresses can be obtained from this?

1 network with 254 hosts

解析：解析：Explanation:Asubnetwith24bitsonwouldbe255.255.255.0.SincethisisaclassCnetwork,thissubnetcanhaveonly1networkand254usablehosts.

[单选题]哪个ACL可允许主机10.220.158.10访问web服务器192.168.3.244()

access-list 101 permit tcp 10.220.158.10 0.0.0.0 host 192.168.3.224 eq 80

[单选题]RIP路由协议认为“网络不可到达”的跳数是：()

16