20+ practice questions focused on Voice Gateways And Session Border Controllers — one of the most tested topics on the Cisco Implementing Cisco Collaboration Core Technologies (CLCOR, 350-801, v2.0 blueprint, CCNP Collaboration) (CLCOR) exam. Each question includes a detailed explanation so you learn why the right answer is correct.
Start Voice Gateways And Session Border Controllers PracticeWhat is the default dial-peer used if no other dial-peer matches a call on a Cisco IOS XE gateway?
Explanation: Cisco IOS XE gateways use dial-peer 0 as the default dial-peer that matches any call not explicitly matched by a configured dial-peer. Dial-peer 0 is a permanent, built-in dial-peer that cannot be deleted or modified, and it serves as the catch-all for inbound and outbound call routing when no other dial-peer matches. This ensures that calls are not silently dropped due to missing dial-peer configuration.
A CUBE is rejecting calls because of a mismatch in supported DTMF methods. Which command forces CUBE to offer both RFC2833 and OOB DTMF?
Explanation: dtmf-relay rtp-nte digit-drop is a common configuration, but to support multiple, the dial-peer must explicitly define the relay types.
A CUBE is experiencing media cut-off issues after 30 seconds. Which parameter in the dial-peer configuration is the most likely cause if the re-invite is not being processed correctly?
Explanation: The timer-hold command controls how long the gateway waits for re-invites, but the issue is typically related to the session-timer which governs the SIP session refresh.
You are configuring CUBE for SIP-to-SIP header manipulation. You need to remove the Diversion header from outgoing INVITE requests. Which component is required to achieve this?
Explanation: Removing a SIP header such as Diversion from outgoing INVITEs is done with a voice class sip-profiles configuration, which contains Lua rules that match and remove headers. The profile is then applied to the outbound dial-peer. Dial-peers, codec classes, and translation-rules do not manipulate SIP headers.
You are configuring a dial-peer to route calls to a PSTN gateway using SIP. Which command is required to enable the use of the SIP protocol on the dial-peer?
Explanation: The session-protocol sip command is the foundational command required to define the signaling protocol for a dial-peer.
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Practice all Voice Gateways And Session Border Controllers questions1. Baseline your knowledge
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2. Review every explanation
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3. Focus on exam traps
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4. Reach 80% consistently
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The exact number varies per candidate. Voice Gateways And Session Border Controllers is tested as part of the Cisco Implementing Cisco Collaboration Core Technologies (CLCOR, 350-801, v2.0 blueprint, CCNP Collaboration) (CLCOR) blueprint. Practicing with targeted Voice Gateways And Session Border Controllers questions ensures you can handle any format or difficulty that appears.
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