920-808 Exam

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the 920-808 Demo:

　
　
Exam : Nortel 920-808
Title : Real-Time Networking Technologies


1. Which method is used for call transfers and redirection to a conference bridge when the Session Initiation Protocol (SIP) is used?
A. PRACK
B. UPDATE
C. REFER
D. NOTIFY
Answer: C

2. Which statement is true concerning the SIP protocol?
A. SIP is based on H.323.
B. SIP is an extension of HTTP/1.1.
C. SIP is a component of HTTP/1.1.
D. SIP is based on a request/response transaction model.
Answer: D

3. Assessing a LAN for its ability to carry VoIP is also known as "network health check".
What is a network health check intended to predict?
A. whether the network can provide efficient signaling and call establishment
B. whether the network has sufficient security in the communication link
C. the reliability of VoIP services running the network
D. identification of VoIP quality-killing impairments
Answer: D

4. Which protocols are used to detect the failures that impact Label Switch Path (LSP) traffic?
A. RSVP-TE Hello and ITU-T Y1711
B. OSPF-TE keep-alive and ATM PNNI
C. RSVP-TE Hello and OSPF keep-alive
D. ITU-T Y1711 and OSPF-TE keep-alive
Answer: A

5. Click on the Exhibit button.
With reference to the exhibit, which statement correctly describes the use of the four-address frame format when A transmits a frame to B?
A. The source station A needs to fill the four address fields of the data frame.
B. The source station A must specify its address and destination address within the same BSS and the BSSID to which the source and stations are associated.
C. The source station A needs only to fill its address in one of the address fields. AP1 will fill the rest of the address fields.
D. The source station A needs only to specify the destination address within the same BSS.
Answer: B

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update time: 27 May.2011