[单选题]访问控制列表分为标准和扩展两种。下面关于ACL的描述中，错误的是()。

正确答案 ：C

标准ACL可以根据分组中的IP目标地址进行过滤

[单选题]An administrator issues the show ip interface s0/0 command and the output displays that interface Serial0/0 is up, line protocol is up.What does "line protocol is up" specifically indicate about the interface?

正确答案 ：C

Keepalives are being received on the interface.

解析：解析：Explanation:

[单选题]交换机上VLAN的功能描述中，正确的是（）

正确答案 ：B

可以减少广播对网络性能的影响

[单选题]路由器上的命令“show version”的功能是（）

正确答案 ：A

显示版本信息

[单选题]During the boot sequence, a Ezonexam 2800 series router needs to locate and load an operating system. What is the default order the router uses to find an operating system?

正确答案 ：B

Flash, TFTP server, ROM

解析：解析：Explanation:BootinguptheRouter:CiscorouterscanbootCiscoIOSsoftwarefromtheselocations:1.Flashmemory2.TFTPserver3.ROM(notfullCiscoIOS)Multiplesourceoptionsprovideflexibilityandfallbackalternatives.

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