WAN Flashcards
What are the common ISP connection types?
Serial, Ethernet (copper or fiber), Wireless
What are the types of WAN connection?
Leased line
Circuit Switched
Packet Switched
What does Packet Switch WAN use?
Frame Relay
Not dedicated circuit
How does Leased Line WAN work?
PPP - Point to Point Protocol
Permanently on and expensive
How does Circuit Switched WAN work?
Pay as you go approach
connection established when needed
What are SLA and CIR?
Service Level Agreement
Committed Information Rate
What are leased line copper connection?
T-1, T-3
E-1, E-3
OC3, OC12
What Fiber WAN connections are there?
SONET - Synchronous optical networking
DWDM - Dense Wavelength Division Multiplexing
CWDM - Coarse Wavelength Division Multiplexing
What are leased line optical connections?
OC3, OC12
What is WAN ATM?
Asynchronous Transfer Mode
Uses CELLS at Layer 2
What is WAN MPLS?
Multi-Protocol Label Switching
Used by ISPs
What is WAN CSMA?
Carrier Sensing Multiple Access
Collision detection on BUS network
What is split horizon?
Prevents routes learned from an interface being advertised on the same interface to prevent routing loops in distance vector routing protocols
What is a CSU/DSU?
Channel Service Unit/Data Service Unit
Terminated a WAN connection
What is a Smart jack/NIU?
Demarcation between ISP and customer to terminate circuit
