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2021 Nov 4A0-M01 free exam

Q1. Given the error message shown While configuring cPipe 400 on the Switching Provider Edge (S-PE) router, you see the error message shown. What must you do to correct this error? 

A. Delete the service and recreate it using thevc-switching keyword 

B. Delete the spoke-SDP and place it in an explicit endpoint 

C. Delete the spoke-SDP and configure it as type vc-switching when you recreate it 

D. Delete the service and recreate it with Interchassis Backup Pseudowires (ICB-PW) 

Answer: A 


Q2. Which statement best describes adaptive timing techniques? 

A. Adaptive timing calculates the time of day from time stamped packets 

B. Adaptive timing calculates the time of day from the arriving packet rate 

C. Adaptive timing only supports frequency synchronization 

D. Adaptive timing only operates on point-to-point links 

Answer: A 


Q3. Click on the exhibit Given the diagram and the following information: 

. Virtual Private Routed Network (VPRN) 5 spans the routers Point of Concentration 

(POC) 3-1 and 3-2 and the Multilevel Switch (MLS) routers MLS1 and MLS2 

. Multiprotocol Border Gateway Protocol (MP-BGP) is configured and operational 

. Pseudowire status is signaled, as shown, on the ePipe/VPRN  spoke Service Distribution Paths (SDPs) 

Which statement correctly describes the illustrated services' normal operations? 

A. A failure on the POC3-1 VPRN interface 'to NodeB" will cause a pseudowire switch on the CSA router 

B. A failure on the POC3-2 VPRN interface 'to NodeB" will cause a pseudowire switch on the CSA router 

C. The CSA router sends traffic down both spoke SDPs 1:50 and 2:50 simultaneously 

D. Both POC3-1 and POC3-2 VPRN interfaces "to NodeB" simultaneously forward traffic to the CSA router 

Answer: A 


Q4. Which statement correctly describes how the Versatile Services Module (VSM) cross-connects Layer 2 and Layer 3 services? 

A. A VSM cross connect bypasses the switch fabric and directly connects the service access ports 

B. Each Cross Connect Aggregation Group (CCAG) requires a dedicated VSM 

C. Optional Q-in-Q encapsulation increases the number of cross connects per CCAG 

D. A Cross Connect Identifier (CCID) allows multiple cross connects on a single CCAG 

Answer: D 


Q5. Which statement best describes phase synchronization as it is used in the backhaul transport? 

A. The master and slave clocks cycle at a rate within 50 parts per billion (ppb) 

B. The master and slave clockframes start within +/- 500 nanoseconds 

C. The slave clock sets its clock frequency to the incoming bit rate 

D. The slave sets its time and date accordingly to the arriving packet rate 

Answer: B 


Latest 4A0-M01 pdf exam:

Q6. Which statement correctly describes a Versatile Service Module (VSM) Layer 2 and Layer 3 service cross-connect’s operation? 

A. Layer 3 Service Access Points (SAPs) must use the "A" paths; Layer 2 services use the B path 

B. The Cross Connect Aggregation Group (CCAG) B path can optionally act as a hot standby path for the A path 

C. A CCAG may rate limit the A or B path all the way up to the maximum CCAG available bandwidth 

D. For resiliency, the CCAG distributes each conversation flow across multiple Cross Connect Adapters (CCA) 

Answer: C 


Q7. Given the following: 

. On the OC-3 port, each provisioned channel group contains all available timeslots. The command result illustrates which circuit status? 

A. The DS1 channel group is administratively turned down 

B. The E1 circuit physical link is operationally down 

C. The multilink bundle has no operational member links 

D. The associated Layer 3 interface is operationallydown 

Answer: D 


Q8. Which SAP port and identifier format is correct for use in a cPipe service configured for Structure Agnostic over Packet (SAToP) operation? 

A. 1/1/3.1 

B. 1/2/1:100/200 

C. bundte-ppp-1.1/100 

D. 2/1/4:300 

Answer: A 


Q9. As cells enter an aPipe service configured for vc-type atm-vcc, how does the ingress Provider Edge  (PE) router handle the cell  header Virtual  Path Identifier/Virtual Channel Identifier (VPI/VCI) values? 

A. The PE strips the cell headers and transports just the payload with a control word 

B. The PE replaces the VPI/VCI with the MPLS service label and control word 

C. The PE replaces the VPI/VCI with another set defined within the service context 

D. The PE transports the original VPI/VCI along with the payload to the egress PE 

Answer: D 


Q10. Click on the exhibit. 

Given the local Provider Edge (PE) router configuration shown and the following condition: 

. All Service Access Points (SAPs) and spoke Service Distribution Points (SDPs) are operational Which pseudowire status will the local PE router signal for the standby spoke SDP? 

A. 0x00,Pseudowire forwarding 

B. 0x01,Pseudowire not forwarding 

C. 0x20, Pseudowire forwarding Standby 

D. 0x21, Pseudowire in standby and not forwarding 

Answer: C