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400-051 Exam Questions - Online Test


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Q1. Assume 18 bytes for the Layer 2 header and a 10-millisecond voice payload, how much bandwidth should be allocated to the strict priority queue for three VoIP calls that use a G.722 codec over an Ethernet network? 

A. 331.2 kb/s 

B. 347.8 kb/s 

C. 261.6 kb/s 

D. 274.7 kb/s 

E. 238.4 kb/s 

Answer:

Q2. When Single Inbox is configured, what will happen to an email message that was moved from any Outlook folder to the Voice Outbox folder? 

A. The email message will be delivered to Cisco Unity Connection. 

B. The email message will be kept in the Voice Outbox folder. 

C. The move will fail because the operation is not supported. 

D. The email message will be moved to the Deleted Items folder. 

E. The email message will be permanently deleted and will not be retrievable. 

Answer:

Q3. Which two enterprise presence domains can federate with Cisco IM and Presence by using SIP? (Choose two.) 

A. AOL 

B. Microsoft OCS 

C. IBM Sametime 

D. Cisco WebEx Connect 

E. Google Talk 

F. Cisco Unified Presence 8.X Releases 

Answer: AB 

Q4. Which message is used by a Cisco IOS MGCP gateway to send periodic keepalives to its call agent? 

A. CRCX 

B. AUCX 

C. NTFY 

D. RQNT 

E. 200 OK 

Answer:

Q5. Which RAS message is used between two gatekeepers to resolve an alias address? 

A. GRQ 

B. ARQ 

C. IRQ 

D. LRQ 

E. RRQ 

Answer:

Q6. Refer to the exhibit. 

A user is going through a series of dialing steps on a SIP Type B IP phone (for example, a Cisco 7975) to call an SCCP IP phone. Both phones are registered to the same Cisco Unified Communications Manager cluster. Assuming that the calling SIP phone is not associated with any SIP dial rules, which statement about how digits are forwarded to Cisco Unified Communications Manager for further call processing is true? 

A. Each digit is sent to Cisco Unified Communications Manager in a SIP NOTIFY message KPML event, at the time that the user enters the digit on the keypad. 

B. The SIP IP phone will wait for the interdigit timer to expire, or for the Dial softkey to be selected before sending each digit to Cisco Unified Communications Manager as a separate KPML event in a SIP NOTIFY message. 

C. The SIP IP phone will wait for the interdigit timer to expire, or for the Dial softkey to be selected.before sending all digits to Cisco Unified Communications Manager in a SIP INVITE message. 

D. The SIP IP phone will wait for the interdigit timer to expire or for the Dial softkey to be selected before sending the first digit in a SIP INVITE and the subsequent digits in SIP INFORMATION messages. 

E. The SIP IP phone will send all digits to Cisco Unified Communications Manager in a SIP INVITE message as soon as the fourth digit is pressed. 

Answer:

Q7. Which statement about system broadcast messages in Cisco Unity Connection is true? 

A. The user can skip a system broadcast message to listen to new messages first. 

B. The user can forward a system broadcast message only if it has been played in its entirety. 

C. System broadcast messages are synchronized between Cisco Unity Connection and Exchange when Single Inbox is configured. 

D. System broadcast messages do not trigger MWI. 

E. System broadcast messages are played immediately after users sign in and listen to message counts for new and saved messages. 

Answer:

Q8. How many signaling bits are there in each T1 time slot using channel associated signaling with Super Frame? 

A. 1 

B. 2 

C. 4 

D. 8 

E. 12 

Answer:

Q9. Refer to the exhibit. 

Assume that the serial interface link bandwidth is full T1. What is the bandwidth that is guaranteed for voice signaling traffic with a DSCP value of CS3? 

A. 33 percent of 1.544 Mb/s 

B. 5 percent of 1.544 Mb/s 

C. 38 percent of 1.544 Mb/s 

D. 62 percent of 1.544 Mb/s 

E. 0 percent of 1.544 Mb/s 

Answer:

Q10. How are DTMF digits transported in RFC 2833? 

A. In the RTP stream with the named telephone events payload format. 

B. In the RTP stream with the regular audio payload format. 

C. In SIP NOTIFY messages. 

D. In SIP INFO messages. 

E. In SIP SUBSCRIBE messages. 

Answer: