MS-720 Question #118: Real Exam Question with Answer & Explanation

Question

You have a Microsoft Teams Phone deployment that has SIP Gateway configured. You need to register Cisco handsets directly with Teams. What should you do first?

Options

• AModify DHCP to update the provisioning server URL.
• BConfigure the handsets to use LLDP.
• CEnable the web server of the handsets.
• DConnect a desktop computer to the PC port of the handsets.

Explanation

Modifying the DHCP server to supply the Teams SIP Gateway provisioning server URL is the mandatory first step because Cisco IP phones automatically query DHCP on boot to discover where their configuration lives (via options such as Option 150 or Option 160). Without the correct provisioning URL pushed by DHCP, the handsets have no way to download the firmware or configuration profile required to register with Teams - every subsequent step depends on this bootstrap.

Why the distractors are wrong:

• B (LLDP): LLDP is a Layer 2 discovery protocol used for VLAN assignment and PoE negotiation - it doesn't drive provisioning or Teams registration.
• C (Enable web server): The handset's built-in web UI is a management convenience, not a provisioning prerequisite; Teams SIP Gateway uses DHCP-directed provisioning, not push from the phone's web server.
• D (PC port): The PC passthrough port connects a desktop for network access - it has no bearing on how the phone registers with Teams.

Memory tip: Think of DHCP as the phone's "first phone call home" - before a Cisco handset can talk to Teams, DHCP must hand it the address (provisioning URL) of where to go next. No address = no conversation.

No community discussion yet for this question.