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About the Interview category
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0
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76
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June 9, 2025
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LIR/LIA pair is primarily used when?
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0
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106
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June 30, 2025
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When the caller hangs up first, which direction is the BYE sent?
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0
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115
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June 30, 2025
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Which Diameter command does an Application Server use on Sh to read user data?
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0
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112
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June 30, 2025
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SRVCC moves a VoLTE call to which domain?
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0
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95
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June 30, 2025
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If the callee is busy, what SIP code is returned?
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0
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72
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June 30, 2025
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What SIP provisional response is optional and used mainly for information w/o media?
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0
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70
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June 30, 2025
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Diameter messages for IMS typically use which transport?
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0
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78
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June 30, 2025
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Which message acknowledges a reliable 183 response?
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0
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79
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June 30, 2025
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A dedicated bearer shares what with its parent default bearer?
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0
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72
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June 30, 2025
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What transport is used for RTP in VoLTE?
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0
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88
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June 30, 2025
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Which protocol is responsible for media control between IMS-MGW and P-CSCF?
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0
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92
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June 30, 2025
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Which SIP response indicates the callee answered the call?
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0
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57
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June 30, 2025
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In SRVCC, which sentence is true?
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0
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72
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June 30, 2025
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Which SIP header carries the user's IMSI during IMS registration?
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0
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121
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June 30, 2025
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Which QCI is defined for conversational voice GBR?
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0
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64
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June 30, 2025
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Which Diameter interface connects I-CSCF/S-CSCF and HSS?
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0
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71
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June 30, 2025
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The media counterpart of ATCF is abbreviated as:
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0
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82
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June 30, 2025
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PCRF uses which command on Gx to install rules?
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0
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83
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June 30, 2025
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What is the purpose of the Diameter 2nd UAR message in IMS Registration Call flow?
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0
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97
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June 30, 2025
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Which SIP method initiates a session in IMS?
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0
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60
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July 1, 2025
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Which security mechanism protects SIP signaling between UE and P-CSCF?
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0
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59
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June 30, 2025
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If the HSS returns `DIAMETER_ERROR_USER_UNKNOWN` in UAA, what SIP response does the I-CSCF send to the UE?
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0
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79
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June 30, 2025
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Access Transfer Control Function (ATCF) primarily handles:
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0
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64
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July 1, 2025
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In Online Charging, which Request Type is used and in Offline also?
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0
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53
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June 30, 2025
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In SRVCC scenarios, what media plane adjustment is done?
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0
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63
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June 30, 2025
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Which Diameter command is used by the S-CSCF to retrieve authentication vectors from the HSS?
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0
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72
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June 30, 2025
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In IMS, what allows early media (ringback) before 200 OK?
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0
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88
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June 30, 2025
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Which protocol is primarily used to carry media (voice/video) in IMS?
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0
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70
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July 1, 2025
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Default IMS signaling bearer uses which QCI?
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0
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80
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June 30, 2025
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