Ran Volte Assessment - Restored

147 Questions | By Ranengteam | Updated: Mar 22, 2022 | Attempts: 1060

Questions

Settings

RAN VoLTE ASSESSMENTPlease read all instructions carefully before starting the quiz:QUIZ comprises of 40 QUESTIONS Total time to complete is 60 MINUTESPassing Score is 75%Questions are primarily MULTIPLE CHOICEMake sure you are in a secure and noise free environment for the entire duration of the quiz. While taking the quiz, you will be allowed to only move to the next QUESTION. However you can mark the question that you want to review again and you can view/edit all your selections before final submission. The Quiz doesn't let you submit without answering all the questions. Before starting to take the quiz, properly enter correct details:

Questions and Answers

1.

Which of the following codecs can be used for HD voice?
- A.
  
  12.2 AMR
- B.
  
  12. 65 AMR - WB
- C.
  
  4.75 AMR
- D.
  
  All of the above
2.

If QCI 1 is mapped to pbit 6, then what is the binary equivalent for the pbit?
- A.
  
  100
- B.
  
  110
- C.
  
  101
- D.
  
  011
3.

Which of the following can impact peformance of a VoLTE call
- A.
  
  Jitter
- B.
  
  Packet Loss
- C.
  
  Latency
- D.
  
  All of the above
4.

Standards for VoLTE are defined in
- A.
  
  RFC3261
- B.
  
  3GPP - Release 8
- C.
  
  GSMA IR.92
- D.
  
  None of the above
5.

The LTE RAN network must support the following combination of radio bearers
- A.
  
  SRB1 + SRB2 + 2 x AM DRB + 1 x UM DRB
- B.
  
  SRB1 + SRB2 + 3 x UM DRB
- C.
  
  SRB1 + SRB2 + 1 x AM DRB + 1 x UM DRB
- D.
  
  Both A. & C. possible
6.

From Figures 1 and 2, we can incur that _________________________
- A.
  
  Call drops & all bearers are setup in next call.
- B.
  
  Call drops and QCI 1 is requested again.
- C.
  
  Call drops due to poor coverage and QCI is not reset in the next call.
- D.
  
  Both A. & B. possible
7.

S-TMSI is combination of which of the two IDs?
- A.
  
  MMEC & M-TMSI
- B.
  
  MMEC & GUTI
- C.
  
  M-TMSI & GUTI
- D.
  
  M-TMSI & MCC
8.

What protocol stack is used over the S1-U interface?
- A.
  
  GTP/UDP/IP/L1,L2
- B.
  
  SCTP/UDP/IP/L1,L2
- C.
  
  UDP/IP/L1,L2
- D.
  
  SCTP/IP/L1,L2
9.

The QoS for default bearer will be defined on which network component?
- A.
  
  SGSN
- B.
  
  MME
- C.
  
  HSS
- D.
  
  PCEF
10.

The interface between PCRF and IMS is __________. Refer to Figure below.
- A.
  
  Gx
- B.
  
  Rx
- C.
  
  Sgi
- D.
  
  S8
11.

The transport, application protocol, QCI value, and GBR for the message in the Figure below are _________,________,_________&_________.
- A.
  
  TCP, GTPV2,1 & 38
- B.
  
  UDP, Diameter, 6 & 38
- C.
  
  UDP, GTPV2, 1 & 38
- D.
  
  IP, UDP, 6 & 38
12.

The UE ip address is __________ and the command code is _________. Refer to Figures 1 and 2 below.
- A.
  
  167.137.241.148,621
- B.
  
  167.137.241.145, 95
- C.
  
  10.0.8.174, No command codes for GTPV protocol
- D.
  
  2600:300:2070:2ff::4, 279
13.

Which IMS node is responsible for identifying the S-CSCF of the UE?
- A.
  
  I-CSCF
- B.
  
  P-CSCF
- C.
  
  MMTAS
- D.
  
  BGF
14.

Which of the following protocols is used in an IMS network for media handling?
- A.
  
  RTP
- B.
  
  SIP
- C.
  
  SCTP
- D.
  
  HTTP
- E.
  
  A & B
15.

What is the correct explanation of the error message – “408 Request Time out”? (Hint: Refer to RFC3261)
- A.
  
  The request is retried by creating a new request with the appropriate modifications.
- B.
  
  The server could not produce a response within a suitable amount of time
- C.
  
  The callee's end system was contacted successfully, but the callee is currently not willing or able to take additional calls at this end system.
- D.
  
  The response has the same meaning as 606 (Not Acceptable)
16.

What is the reason for MO call setup failure? Refer to call flow in Figure below.
- A.
  
  User disconnects the call.
- B.
  
  SCC-AS responds with an error message.
- C.
  
  MT UE is not reachable.
- D.
  
  None of the above.
17.

How many possible transactions take place in the following dialogue? Refer to call messages in Figure below.Note: Logs collected at MO UE.”
- A.
  
  3
- B.
  
  4
- C.
  
  5
- D.
  
  No transcations can occur in a dialogue
18.

QCI 1 needs to be configured in eNB with…
- A.
  
  SIP signaling
- B.
  
  RLC UM
- C.
  
  Resource Fair Scheduler
- D.
  
  LCG 0
19.

Uplink Scheduling Stratey for VOLTE is decided based on ……
- A.
  
  Highest priority QCI
- B.
  
  LCG
- C.
  
  Delay/late to miss target
- D.
  
  LCG for VOLTE
20.

What is in LCG 3?
- A.
  
  QCI 9/best effort traffic
- B.
  
  SRB
- C.
  
  VoLTE
- D.
  
  QCI1 and QCI5
21.

What PmServiceTimeUE does?
- A.
  
  Count Service Time
- B.
  
  Aggregate Services for all DRB
- C.
  
  All UE time
- D.
  
  Sum of all VOLTE UE
22.

VOLTE enabler features includes….
- A.
  
  RAN Caching, Adaptive TCP Proxy, Media Transcoding
- B.
  
  IMS locator, HO to Wifi
- C.
  
  TTI Bundling, DRX, RoHC
- D.
  
  Adaptive RRM handling, capacity handler for services such as VOLTE
23.

What is the maximum PDB limit for GBR?
- A.
  
  300 ms
- B.
  
  100 ms
- C.
  
  200 ms
- D.
  
  220 ms
24.

GBR stands for...
- A.
  
  Gurrantee bit rate
- B.
  
  Gurrantee byte rate
- C.
  
  Gauge bar rate
- D.
  
  Giga Bit packet rate
25.

Delay based scheduling bundle ____ packets for scheduling efficiency.
- A.
  
  4
- B.
  
  1
- C.
  
  2
- D.
  
  2.5