Free HPE6-A86 sample questions

Correct answers: The `ip routing` command enabled globally; Configured Switched Virtual Interfaces (SVIs) for each VLAN with an IP address

This global command enables Layer 3 routing capabilities on the switch. Without it, the switch operates only at Layer 2 and cannot route between VLANs.

Each VLAN that needs to participate in routing requires a Layer 3 interface, which is an SVI (e.g., `interface vlan 10`). This SVI must be configured with an IP address from its respective subnet to act as the default gateway for devices in that VLAN.

Correct answer: False

This statement is false. If the TFTP server is on the same IP subnet as one of the switch's IP interfaces (like the management VRF), the switch can use ARP to find the server's MAC address directly and does not need a default gateway. A default gateway is only required when the destination IP address is on a different subnet.

Correct answer: Classification

Classification is the first step in any QoS policy. It is the process of identifying and categorizing traffic based on its characteristics, such as source/destination IP, port numbers, or, in this case, the existing DSCP value. Once classified, the traffic can then be subjected to other QoS actions like marking, queuing, and scheduling.

Correct answer: configuration session timeout 10

The `configuration session timeout ` command starts a timed session. If the administrator does not enter the `configuration session confirm` command within the specified timeout period (10 minutes in this case), the switch automatically discards all changes made during the session and reverts to the configuration that existed before the session started. This is a critical safety feature for remote management.

Correct answer: A mismatched SFP/SFP+ transceiver pair

For a fiber link to come up, the transceivers (SFP/SFP+) at both ends must be compatible. Common mismatches include using a multi-mode (SR) transceiver on one end and a single-mode (LR) transceiver on the other, or using different wavelength transceivers. This would prevent the optical link from establishing, resulting in a 'down' port status. VLAN mismatches or STP issues occur at Layer 2 and would not typically cause the physical link to be down.

Correct answer: NetEdit

Aruba NetEdit is specifically designed for intelligent network automation and orchestration. Its key features include centralized configuration, validation of changes before deployment, conformance checks against a baseline, and detection of configuration drift, making it the correct tool for these tasks.

Correct answer: To map a known IP address to an unknown MAC address on the local network segment.

ARP operates at the boundary of Layer 2 and Layer 3. When a device needs to send a packet to another device on the same local network, it knows the destination IP address but needs the destination MAC address to build the Layer 2 Ethernet frame. ARP is the protocol used to broadcast a request (`Who has IP address X?`) and receive a reply (`I have IP address X, my MAC address is Y.`)

Correct answer: interface 1/1/24 vlan trunk native 10 vlan trunk allowed 10,20,30

This is the correct command sequence. `vlan trunk native 10` specifies that frames belonging to VLAN 10 will be sent untagged across this link. `vlan trunk allowed 10,20,30` explicitly permits traffic for all three required VLANs. It is important to include the native VLAN in the allowed list as well.

Correct answers: BPDU Guard; Root Guard

BPDU Guard should be enabled on all access ports where end devices (and not other switches) are expected. If any Spanning Tree Bridge Protocol Data Units (BPDUs) are received on a port with BPDU Guard enabled, it immediately puts the port into an err-disabled state, effectively disconnecting the rogue switch from the network.

Root Guard is another mechanism to protect the STP topology. When enabled on a port, it prevents that port from ever becoming an STP root port. If a superior BPDU (from a switch with a better bridge ID) is received on a Root Guard-enabled port, the port is put into a root-inconsistent state, effectively ignoring the rogue switch's attempt to become root without shutting down the port entirely.

Correct answer: lacp mode active

The Link Aggregation Control Protocol (LACP), defined in IEEE 802.3ad, is the standards-based protocol for dynamically negotiating and managing LAGs. Configuring `lacp mode active` on the LAG interface tells the switch to actively initiate LACP negotiations with the peer switch, ensuring the LAG is formed correctly and dynamically.