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2021 Nov 4A0-M01 exam prep
Q51. Each numbered item, 1, 2, 3, and 4, represents a message exchanged between an IEEE 1588v2/Precision Time Protocol (PTP) v2 master and slave. With which message does the master pass its t1 timestamp to the slave clock at item 2?
A. Announce
B. Delay_request
C. Delay_response
D. Sync
Answer: D
Q52. Click on the exhibit.
Given the following:
. On the OC-3 port, each provisioned channel group contains all available timeslots. The command result illustrates which OC-3 port characteristic?
A. On STS1-3,the second DS1 channel group in the fourth VTG is set for atm encapsulation
B. On STS1-3, the second E1 channelgroup in the fourth VTG uses onlythe first 24 timeslots
C. On STS1 -3, the second DS1 channel group i n the fourth TUG-2 is set for 32 timeslots
D. On STS1-3, the second VT2 in the fourth TUG-2 is set for atm encapsulation
Answer: A
Q53. Given the configuration shown and the following information:
- The port configured as shown is used in a cPipe service Service Access Point (SAP) 1/2/1.1
- Each packet contains a 256 byte payload. Based on the number of timeslots in each frame, what jitter buffer size, in milliseconds (ms), does the router set for this SAP?
A. 5 ms
B. 8 ms
C. 16 ms
D. 32 ms
Answer: A
Q54. Given the diagram shown and the following information:
. Ethernet frames carrying payloads targeting the Base Transceiver Station (BTS) enter the iPipe through the Virtual Private Routed Network (VPRN) cross connected interface.
How does the iPipe service process frames received on ingress to sap ccag-1 b:300?
A. The iPipe forwards all unicast payloads received in frames with a destination Media Access
Control (MAC) address equal to the proxied BTS MAC address
B. The iPipe extracts the Internet Protocol (IP) packets from all frames received on the Ethernet SAP and forwards those with a destination IP equal to the BTS IP address
C. The iPipe blocks multicast and broadcast frames at the Ethernet SAP ingress and only forwards unicast payloads to the BTS
D. The iPipe SAP sends an Address Resolution Protocol (ARP) request for the BTS's MAC address and forwards the frame with the BTS destination MAC address
Answer: A
Q55. Upon initial configuration and turn up, what does this show result indicate about the Multilink Point- to-Point (ML-PPP) bundle's current state?
A. The local or remote Layer 3 interface is operationally down
B. The number of bundle links has dropped below the minimum threshold
C. The remote bundle is administratively shut down
D. PPP Link Control Protocol (LCP) negotiations failed
Answer: A
Down to date 4A0-M01 exam answers:
Q56. A 7750 Service Router (SR) receives BITS clocking over a Superframe (SF) framed DS1 circuit. Assume SONET mode operation, which quality level does the router associate with this circuit?
A. QL-DUS
B. QL-EEC2
C. QL-SMC
D. QL-STU
Answer: D
Q57. Given the diagram shown:
Which statement correctly describes how the Switching Provider Edge (S-PE) handles Targeted Label Distribution Protocol (T-LDP} messages sent on behalf of the ePipe 1 service?
A. As soon as the S-PE receives a label from the downstream T-PE it returns its own label to the source
B. The S-PE appends to T-PE Forwarding Equivalence Class (FEC)messages a pseudowire switching Type-Length-Value (TLV)
C. The S-PE replaces the T-PE signaled FEC with its own System ID before relaying messages upstream to CSA1
D. The S-PE adds a label to the stack to indicate to the upstream T-PE that it is an S- PE
Answer: B
Q58. Which statement describes the message characteristics of ITU-T Ethernet Synchronization Messaging Channel (ESMC)?
A. ESMC messages can be routed throughout the timing domain
B. ESMC messages target the slow protocol multicast destination address
C. SMC messages target the slave's unicast Internet Protocol (IP) address
D. ESMC messages deliver timestamps for phase synchronization
Answer: B
Q59. A Synchronization Ethernet (SyncE)/Synchronization Status Message (SSM)-capable node is configured to support the ITU-T G.781 SDH mode. Which SSM code indicates that the node has gone into holdover?
A. GL-DNU
B. QL-EEC1
C. QL-SSU-A
D. QL-PRC
Answer: B
Q60. Given the diagram shown, and the following information:
. Configured on CSA1 and the two MLS routers is redundant aPipe 300
. Interchassis Backup Pseudowires (ICB-PW) provide a path of last resort to the Customer Edge (CE) Service Access Points (SAPs)
. Multichassis Automatic Protection Switching (MC-APS) protects the CE access ports
. Assume normal status on all aPipe 300 spoke Service Distribution Points (SDPs) If the CSA1 primary spoke SDP fails, which three statements correctly describe the resulting status of the MLS1 aPipe 300 endpoint objects? (Choose three)
A. SAP aps-52.1:20/200 active
B. SAP aps-52.1:20/200 standby
C. Spoke SDP 3:300 active
D. Spoke SDP 3:300 standby
E. Spoke SDP 3:301 active
F. Spoke SDP 3:301 standby
Answer: B, C, F