READ Free Dumps For Cisco- 400-051
| Question ID 13007 | Refer to the exhibit.
Assuming this NFAS-enabled T1 PRI configuration on a Cisco IOS router is fully functional,
what will the controller T1 1/1 D-channel status be in the output of the show isdn status
command?
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| Option A | MULTIPLE_FRAME_ESTABLISHED
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| Option B | TEI_ASSIGNED
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| Option C | AWAITING_ESTABLISHMENT
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| Option D | STANDBY
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| Option E | INITIALIZED
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| Correct Answer | B |
Explanation Explanation: TEI_ASSIGNED, which indicates that the PRI does not exchange Layer 2 frames with the command to first check the controller t1 circuit, and verify whether it is clean (that is, it has no errors) before you troubleshoot ISDN Layer 2 problem with the debug isdn q921.
| Question ID 13008 | Which two statements describe characteristics of Cisco Unified Border Element high
availability, prior to Cisco IOS release 15.2.3T, using a box-to-box redundancy
configuration? (Choose two.)
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| Option A | It leverages HSRP for router redundancy and GLBP for load sharing between a pair of routers.
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| Option B | Cisco Unified Border Element session information is check-pointed across the active and standby router pair.
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| Option C | It supports media and signal preservation when a switchover occurs.
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| Option D | Only media streams are preserved when a switchover occurs.
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| Option E | It can leverage either HSRP or VRRP for router redundancy.
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| Option F | The SIP media signal must be bound to the loopback interface.
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| Correct Answer | B,D |
Explanation Explanation: Configure box-to-box redundancy when you: Expect the behavior of the CSSs to be active/standby (only the master CSS processes flows) Can configure a dedicated Fast Ethernet (FE) link between the CSSs for the VRRP heartbeat Do not configure box-to-box redundancy when you: Expect the behavior of the CSSs to be active-active (both CSSs processing flows). Use VIP redundancy instead. Cannot configure a dedicated FE link between the CSSs. Require the connection of a Layer 2 device between the redundant CSS peers.