CCNA认证属于Cisco售后工程师认证体系得入门认证，通过CCNA可以证明你已掌握网络的基本知识， 并能初步安装、配置和操作Cisco路由器、交换机及简单的LAN和WAN。CCNA认证表示经过认证的人员具有为小型办公室/庭办公室（SOHO）市场联网的基本技术和相关知识。通过CCNA认证的专业人员可以在小型网络（100或100以下个节点）中安装、配置和运行LAN、WAN和拨号访问业务。他们可以使用的协议包括（但不限于）IP、IGRP、OSPF、EIGRP、IPX、Serial、Apple、Talk、Frame Relay、IP RIP、VLAN RIP、Ethernet、Access Lists。CCNA认证的考试CCNA升级为640-802且Cisco推出新认证CENNT（2007年8月1日起实行）
新版CCNA考试640-802的简介
考试编号：640-802
考试时间：90分钟
考题数目：50-60题
及格分数：825
考试题型：模拟题；少数连线题；多项选择题及单项选择题。下面列出几道题.
1.Which two locations can be configured as a source for the IOS image in the boot system command?
(Choose two.)
A.RAM
B.NVRAM
C.flash memory
D.HTTP server
E.TFTP server
F.Telnet server
Answer:C E
2.Which of the following IP addresses fall into the CIDR block of 115.64.4.0/22? (Choose three.)
A.115.64.8.32
B.115.64.7.64
C.115.64.6.255
D.115.64.3.255
E.115.64.5.128
F.115.64.12.128
Answer:B C E
3.A network administrator must configure 200 switch ports to accept traffic from only the currently attached host devices. What would be the most efficient way to configure MAC-level security on all these ports?
A.Visually verify the MAC addresses and then telnet to the switches to enter the switchport-port security mac-address command.
B.Have end users e-mail their MAC addresses. Telnet to the switch to enter the switchport-port security mac-address command.
C.Use the switchport port-security MAC address sticky command on all the switch ports that have end devices connected to them.
D.Use show mac-address-table to determine the addresses that are associated with each port and then enter the commands on each switch for MAC address port-security.
Answer:C
【编辑推荐】
