单项选择题

What protocol enables Ethernet over SONET/SDH encapsulation interoperability between the G-series and ML-series Ethernet cards？（）

A. LEX
B. HDLC
C. GFP-F
D. PPP/BCP

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单项选择题

You are provisioning an E-1 circuit on an ONS 15454 MS-SPRing configuration and XC-VXL-10G card. Each VC-12 connection must also terminate via the VC-3 matrix.
How many VC-3 ports remain after this circuit is created， assuming no other circuits？（）

A. 92
B. 93
C. 94
D. 95
E. 96

单项选择题

What is the difference between 1+1 and 1：1 protection switching？（）

A. 1+1 is based on APS， while 1：1 is based on IPS.
B. 1：1 is used in SNCP switching， while 1+1 is used in MS-SPRing switching.
C. 1+1 sends signals on Working and Protect paths， while 1：1 sends signals only on Working path.
D. 1+1 sends signals on Working path ONLY， while 1：1 sends signals on both Working and Protect paths.

单项选择题

With R4.0， how many total DCC-R tunnel connections can each ONS 15454 support using the TCC+ card？（）

A. 10
B. 32
C. 64
D. 84
E. 96