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State if the following statements are true or false. Provide explanation for your answer 1. Bandwidth request change can be sent in three cases (True) Before call (to change Pregrant), during call, by GK 2. GK is the only node that sends BRJ (True) BRJ message is sent by the GK to reject the bandwidth change request. BRJ should be used by endpoint only if the new bandwidth cannot be supported. A called terminal informs the calling GK of its BRJ by sending a facility 3. Admission messages always required (False) there is a pre-granted admission where the GK provide an endpoint with admission in advanced to minimize call setup time. This pre-granted admission is included in RCF in the parameter preGrantedARQ. 4. (False) All H323 messages are sent by terminal or GK 5. Q931 is encapsulated in TCP 6. Call model field is optional in ACF message 7. Call model parameter instruct the terminal to establish a direct or via GK call 8. (False) MCU functionality cannot be decomposed 9. (False) Unicast LRQ message can be rejected by the GK 10. (False) Discowery messages are sent only when a node attempts to join a 11. (False) BRQ is only sent by the endpoint terminals 12. (False) Release message and release complete messages are sent only by end 13. terminals (False) The operation of H225 and H245 is sequential 14. (Falsc) The control channel in H245 is always needed and on 15. (False) H323 messages are carried over TCP only 16. (False) H245 main objective is to carry audio data over the logical channels 17. (False) Q.931 is a VoIP specific protocol while Q.932 is a traditional telephony 18. (True) The frequency of status messages is provided in IRR message 19. (False) Facility message is part of Q.931 20. (True) Facility message is used to change codec 21. (True) Gatekeeper can agree to send or not to send the ACK in ACF or RCF 22. (False) All messages of Q.931 in ISDN is utilized in VoIP