CCNA 640-802 考試認證
CCNA認證（CCNA－思科網酪安裝和支持工程師）(Cisco Certified Network Associate)是整個Cisco認證體系中最初級的認證，同時它也 是獲得CCNP認證、CCDP認證和CCSP認證的必要條件（CCIP認證、CCIE認證不強制要求），而且許多Cisco專業認證（Cisco Qualified Specialist）也要求考生首先得CCNA認證。
CCNA認證屬於Cisco售後工程師認證體系得入門認證，通過CCNA可以證明妳已掌握網酪的基本知識， 並能初步安裝、配置和操作Cisco路由器、交換機及間單的LAN和WAN。CCNA認證表示經過認證的人員具有為小型辦公室/庭辦公室（SOHO）市場聯網的基本技術和相關知識。通過CCNA認證的專業人員可以在小型網酪（100或100以下個節點）中安裝、配置和運行LAN、WAN和撥號訪問業務。他們可以使用的協議包括（但不限於）IP、IGRP、OSPF、EIGRP、IPX、Serial、Apple、Talk、Frame Relay、IP RIP、VLAN RIP、Ethernet、Access Lists。
分享幾道最新考古題:
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