DHCP questions cover server configuration, relay agents (ip helper-address), DHCP snooping, and the four-step DORA handshake. Common exam scenarios: a host isn't getting an IP, a relay agent isn't forwarding requests, or a rogue DHCP server is handing out wrong addresses.
Start Scenario PracticeAn engineer is troubleshooting a Cisco ISE deployment where some endpoints are not being profiled correctly. The administrator notices that the endpoints are not sending DHCP requests. Which profiling probe should be primarily used to identify these endpoints?
Explanation: (NetFlow probe) because when endpoints do not send DHCP requests, the DHCP probe cannot collect any data. The NetFlow probe analyzes network traffic flows to identify endpoints based on IP addresses, ports, and protocols, even without DHCP activity. This allows Cisco ISE to profile endpoints by observing their communication patterns, such as HTTP or DNS traffic, which still occur even if DHCP is not used.
In Cisco ISE, profiling is used to identify device types. Which probe must be enabled for ISE to determine the operating system of a device by analyzing DHCP options?
Explanation: DHCP Probe analyzes DHCP packet options (e.g., option 55) to identify the device's OS or vendor class, enabling ISE to profile the device type.
A network administrator configures Cisco ISE to identify devices by analyzing DHCP requests, HTTP user agents, and SNMP queries. Which ISE feature is being used?
Explanation: Profiling in ISE uses probes (DHCP, HTTP, SNMP, etc.) to identify device type and attributes.
A network administrator is configuring Cisco ISE for device profiling. The goal is to identify the type of device (e.g., Windows PC, iPhone, printer) connecting to the network. Which probe should be used to gather the DHCP option 60 (vendor class identifier) and option 12 (hostname) information?
Explanation: The DHCP probe in ISE collects information from DHCP packets, including option 60 (vendor class identifier) and option 12 (hostname), which are used for device profiling.
Drag and drop the steps to configure a Cisco router as a DHCP server in the correct order.
Explanation: First create pool, define network, then set options like default-router and dns-server, and exclude addresses before or after.
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Practice all DHCP Troubleshooting ScenariosDHCP questions cover server configuration, relay agents (ip helper-address), DHCP snooping, and the four-step DORA handshake. Common exam scenarios: a host isn't getting an IP, a relay agent isn't forwarding requests, or a rogue DHCP server is handing out wrong addresses. These appear throughout the 350-701 and require you to apply your knowledge, not just recall facts.
Cisco doesn't publish an exact breakdown, but scenario-based questions (especially exhibit and command-output formats) make up a significant portion of the 350-701. Practicing each scenario type ensures you're ready for any format.
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