Read the summary and the most important questions on SPCOR

• 1 Describe service provider network architectures

• 1.6 network transport technologies

• What are deployed by using different technologies in the different parts of the SP network? 

  Transport networks

• 1.6.1 SONET and SDH

• What two standards specify communication over fiber optics as well as electrical carriers for lower-speed signaling rates (up to 155 Mbps)? 

  SONET and SDH

• 1.6.2 DWDM and ROADM

• What technology multiplexes several Optical Carrier signals into a single optical fiber by using different wavelengths of laser light? 

  WDM reconfigurable optical add/drop multiplexing (ROADM)

• What refers to optical signals that are multiplexed within the 1550-nm band?

  DWDM

• 1.6.3 CES and TDM over IP

• What is typically used to transfer voice or video traffic across an ATM network? 

  Circuit emulation service (CES)

• What is a transport technology that is optimized for trunking T1 or E1, T3 or E3, and multiline voice and serial data across packet-switched networks (PSNs)? 

  TDM over IP (TDMoIP)

• 1.6.4 IP over DWDM

• What is a technology that integrates DWDM on routers? 

  IP over DWDM (IPoDWDM) 

• 1.6.5 Carrier Ethernet

• What is a term for Ethernet extensions that enable service providers to offer Ethernet services to customers and to use Ethernet technology in their networks? 

  Carrier Ethernet (CE)

• 1.6.6 Carrier Ethernet Services

• From a customer perspective, the network connection from the customer side of the UNI (demarc between CE and WAN) is what?

  Ethernet

• What are an association of two or more UNIs?

  EVCs Ethernet Virtual Connections (EVCs)