QUESTION NO: 111
Call Admission control (CAC) is a concept that applies to voice traffic only – not data traffic. Which two types are of Call Admission Control? (Choose two.)
A. resource-based
B. gatekeeper-controlled RSVP
C. local
D. QoS-based
Answer: A,C Explanation: There are various types of CAC mechanisms available in current versions of Cisco IOS Software. These mechanisms are grouped into three categories. They are Local CAC, Measurement Based CAC and Resource Based CAC.
QUESTION NO: 112
Refer to the output from the debug h225 asn1 command in the exhibit. You have configured a gatekeeper with two local zones, hq and br. You want the gateway at the branch location to register with zone BR. What needs to be corrected in the branch gateway to resolve the issue?
A. Change the gatekeeper-id in the h323-gateway voip id command.
B. Change the IP address in the h323-gateway voip id command.
C. Change the gatekeeper-id and the IP address in the h323-gateway voip id command.
D. Add a zone remote for zone BR so the gateway can register with the correct zone.
Answer: A Explanation: Please note that gateway is currently using HQ as the gatekeeper-id. This needs to be changed to BR for the gatekeeper to register with BR Zone. This can be done using the h323?gateway voip id GK1ID command.
QUESTION NO: 113
Refer to the exhibit. The Carmichael caller dials the site access code for Merrimack (6) followed by the four-digit extension number of the destination phone (0124). If the call is going to go across the IP WAN, which action will have to be taken?
A. Strip the site access code and send four digits.
B. Strip the site access code and prepend 1512555.
C. Strip the site access code, send four digits, then prepend the access code when it reaches the Merrimack gateway.
D. Translate 50124 to 5125550124.
E. Do nothing because the site access code matches the last five digits of the target number.
Answer: A
Explanation:
The site access code is just used to inform the originating gateway which gateway it needs to send traffic to. Therefore, after learning the traffic should be sent to Merrimack gateway, it trips off the site access code. Notice that the receiving gateway will receive “0124, which is enough information to ring the phone plugged into it.
QUESTION NO: 114
In North America, which E&M signaling type is used most often for geographically separated equipment?
A. Type I
B. Type V
C. Type III
D. Type IV
E. Type II
Answer: A Explanation: E&M Type 1 is the most commonly used interface in North America but this type generates significant delay in the signaling operation when transmitting between geographically separated equipment and affects voice signal quality.
QUESTION NO: 115
Refer to the exhibit. All IP phones use SCCP. Fax machine F calls fax machine J. Which call setup signaling statement is correct?
A. Fax F signals Fax J directly. Call setup is handled by the fax machines.
B. Gateway A processes the call and signals gateway B. Gateway B processes the call. During the setup, the gateways query the gatekeeper for address resolution and call setup permission.
C. Gateway A processes the call and signals gateway B. Gateway B processes the request.
D. Gateway A signals the gatekeeper. The gatekeeper processes the call and signals gateway B.
E. Gateway A signals the call agent. The call agent processes the call and signals gateway B.
Answer: B Explanation: Gateways are responsible for edge routing decisions between the PSTN and the
H.323 network. Cisco gatekeepers handle the core call routing among devices in the H.323 network and provide centralized dial plan administration. Without a Cisco gatekeeper, explicit IP addresses for each terminating gateway would have to be configured at the originating gateway and matched to a VoIP dial peer. With a Cisco gatekeeper, gateways query the gatekeeper when trying to establish VoIP calls with remote VoIP gateways. For example, when presented with a call, the gateway determines whether to send it to the telephony leg or to the IP leg according to its dial plan. In the case of the IP leg, the gateway queries the Cisco gatekeeper to select the best endpoint. The Cisco gatekeeper determines if the called endpoint is within its local zone or is located at a remote zone controlled by a remote Cisco gatekeeper.
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