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What are the Basic Knowledge Points for CCNA Certification?
May 17,2018
CCNA Certification is the first step for Cisco certifications. I will introduce some basic knowledge points of WAN device and WAN type below.
WAN Device
Modem
Router
CSU/DSU（channel service unit/data service unit）
WAN switch: L3
ATM（asynchronous transfer mode）
switch
WAN Type
PSTN（public switch telephone network
ISDN（integrated services digital network）
Lsased line DDN
X·25: Defines how to maintain the connection between the DTE and the DCE for remote terminal access and computer communication on the PDN (Public Data Network)
frame-relay
ATM（asynchronous transfer mode）
Hope the above basic knowledge points of CCNA can help you well.
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