CCNA Explorer 4 Accessing the Wan

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Wans
Small Office home - Lille kontor
Campus - Hovedkontor
Branch - Filialer
Distributed
Enterprise Arkitektur
Enterprise Arkitektur
Enterprise Arkitektur
Eksempel
OSI og lag 2 WAN's
Udbyder og kundeplaceret udstyr (Demarcation Point)
WAN enheder
  • Channel Service Unit/Data Service Unit

WAN standarder

Fysiske standarder
Fysiske standarder
Data Link protokoller
HDLC frame.

  • Flag - 01111110 Start and end delimiter
  • Address - Not needed but still present on p2p links
  • Control - Is it network traffic or control data
WAN typer i CCNA
Amerikanske og Europæiske standarder ofte forskellige
Linie hastigheder

WAN typer

ISDN
X.25
Frame Relay
ATM
DSL
Cable
Wireless
VPN
VPN
Metro Ethernet
WAN typer 1
WAN typer 2