課程名稱︰ 網際網路電話系統
課程性質︰ 選修
課程教師︰ 逄愛君
開課學院： 電機資訊學院
開課系所︰ 資訊所、網媒所
考試日期（年月日）︰2007 Jan 16
是否需發放獎勵金： 是
試題 :
IP Telephony (Final Exam)
January 16, 2007
1. SIP Extensions:
(a) Describe the functions of SIP INFO method. (10%)
(b) Why should the reliability of provisional responses be supported
in SIP? How to achieve it? (20%)
2. In what scenario will Softswitch be a selection for VoIP service? Why?
(10%)
3. Please describe the advantages of separation of media and call
control. (10%)
4. Comparethe design of H.323/SIP with that of MGCP/MEGACO.
(10%)
5. Describe the issues discussed in IETF SIGTRAN. (10%)
6. Explain why SCTP is more suitable for SIGTRAN than TCP or UDP.
(10%)
7. Which factors does the required bandwidth for a single call depend
on? (10%)
8. What will IMS bring for next generation mobile/fixed
telecommunications networks? (10%)
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