Implementing Enterprise Wan Links

Terms in this set (18)

Name an example of a popular WAN technology that use [acket switching.
Frame Relay
What is the most common LAN technology?
Ethernet
What is a combined device called which prepares data for transmission across a service providers network?
CSU/DSU (This can be integrated into a router or an adapter card)
What is the point called where the control and responsibility of the customer ends and the control and resposibility of the service provider begins?
Demarcation Point (demarc)
What term do service providers use to describe equipment located at the customer site?
Customer Premise Equipment (CPE)
What is the location where the service provider stores equipment and accepts customer connections?
Central Office (CO)
What is the connection where the physical line from the CPE connects into a router or WAN switch at the CO?
local loop (or last mile) From the customer perspective , this is the "first mile" because it is the first part of the medium leading from the location of the customer.
What controls the rate at which data moves onto the local loop?
The CSU/DSU or modem
Aside from controlling the rate at which data moves onto the local loop, what else does the CSU/DSU do?
Provides the clocking signal to the router
What standard defines a single line that supports 24 DS0s, plus an 8-kbps overhead channel?
Digital Signal Level 1 (DS1)
What speed does the DS1 standard enable?
1.544 Mbps
What standard supports 28 DS1s and has speeds of up to 44.736 Mbps?
Digital Signal Level 3 (DS3) A T3 line uses this standard.
WAN standards describe what two OSI model layers?
Layer 1 and Layer 2 (Physical and Data Lnk)
What are some examples of organizations that are responsible for managing both the physical layer and the data link layer WAN standards?
ITU-T, ISO, IETF, EIA, TIA
What does POTS stand for?
Plain Old Telephone System
How many DS0s can you split a T1 line into?
A T1 connection can be split into 24 DS0s of 64 kbps each
What are the two techniques by which information from multiple channels can be allocates bandwidth on a single cable based on time>
1. Time-Division Multiplexing (TDM)
2. Statistical Time-Division Multiplexing (STDM)
What is the term for a part of a T1 or E1 connection?
A fractional T1 or E1
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