HPE Aruba Network Technician (HPE3-U01) Certification Sample Questions

02. A host has IP address 172.16.5.10 with a /16 prefix and a correctly set default gateway. For which destinations does the host send traffic to its default gateway?
(Select two.)
a) 172.16.200.8
b) 10.16.5.10
c) 172.16.0.50
d) 172.16.5.200
e) 172.17.5.10

03. PC-A in VLAN 10 and PC-B in VLAN 20 connect to the same multilayer switch. The switch has an IP interface for each VLAN, and each interface is the default gateway for its VLAN. How does a packet from PC-A reach PC-B?
a) PC-A sends the frame to its gateway's MAC address, and the switch routes it into VLAN 20.
b) The switch floods the frame into every VLAN because PC-B's MAC address is in a different VLAN.
c) PC-A sends an ARP request for PC-B's MAC address, then sends the frame directly to PC-B.
d) The switch changes the frame's VLAN from 10 to 20 at Layer 2, without reading the IP header.

04. A router has two Ethernet interfaces in use. Interface 1 connects to a switch, and four PCs connect to that switch. Interface 2 connects to a hub, and three PCs connect to that hub. No VLANs are configured.
How many collision domains and broadcast domains does this network contain?
a) 9 collision domains and 2 broadcast domains
b) 6 collision domains and 1 broadcast domain
c) 5 collision domains and 2 broadcast domains
d) 6 collision domains and 2 broadcast domains

05. Two neighboring APs in an office both use 5 GHz channel 36 at 20 MHz, and each AP can hear the other's transmissions clearly. Which statement describes the interference between them?
a) It is co-channel interference, so frames from both APs are corrupted and dropped.
b) It is co-channel interference, so the APs and clients take turns to transmit.
c) It is adjacent-channel interference, so each AP corrupts the other's frames.
d) It is adjacent-channel interference, so the APs must take turns to transmit.

06. A laptop is moved from port 1/1/3 to port 1/1/7 on the same switch and stays in the same VLAN. The laptop then sends a frame. What does the switch do with its MAC address table entry for the laptop?
a) It waits for an ARP reply from the laptop before changing the entry.
b) It updates the entry so the laptop's MAC address points to port 1/1/7.
c) It adds a second entry so the laptop's MAC address points to both ports.
d) It keeps the entry on port 1/1/3 until the entry ages out.

07. Two APs in an open area with no obstructions use the same transmit power and the same antennas. One radio uses the 2.4 GHz band and the other uses the 5 GHz band. Which statement about their coverage is true?
a) The 2.4 GHz signal covers a larger area because path loss rises with frequency.
b) The 5 GHz signal covers a larger area because higher frequencies carry more energy.
c) The 5 GHz signal covers a larger area because the band has more channels.
d) Both signals cover the same area because free-space loss depends only on distance.

08. In the 2.4 GHz band, why does a radio on channel 1 overlap with a radio on channel 3?
a) Each channel is 5 MHz wide, but channel centers are 20 MHz apart.
b) Channels 1 and 3 use the same center frequency.
c) Channels are about 20 MHz wide but only 5 MHz apart.
d) All channels from 1 to 11 share one 20 MHz block of spectrum.

09. An administrator uses HPE Aruba Networking Central to create a new WLAN in a group. Which settings are defined as part of the WLAN itself?
(Select two.)
a) the SSID that clients see and select
b) the security method clients use to authenticate
c) the management IP address that each AP uses
d) the subscription assigned to each AP in the group
e) the serial number used to add each AP to the device inventory

10. Interface 1/1/48 on an AOS-CX switch links to another switch and must carry VLANs 10 and 20 as tagged traffic. Both VLANs exist, and routing is disabled on the port.
Which command should the technician enter in the interface context?
a) vlan trunk native 10,20
b) vlan access 10, then vlan access 20
c) vlan access 10,20
d) vlan trunk allowed 10,20