Networking Fundamentals
beginner
100 XPConnect two PCs in the same subnet
Two new PCs and a switch are on the desk — nothing is cabled and PC-B has no address.
Missions
Each mission seeds a lab with a known fault. Checks run against the live simulator, so you can only finish when the network actually works.
Networking Fundamentals
beginner
120 XPFix an incorrect IP / subnet
PC-B cannot reach anything on the office network, but its cable and switch port look fine.
Enterprise IT & Windows Server
intermediate
150 XPRestore DHCP
PC-B was switched to DHCP but shows no usable address.
Networking Fundamentals
beginner
130 XPResolve a DNS failure
Users on PC-A say 'intranet.local doesn't work', yet pinging 192.168.10.5 succeeds.
CCNA-style Routing & Switching
intermediate
150 XPRepair a VLAN mismatch
PC-B has a correct IP and the link LED is green, but it cannot reach PC-A, the server or the gateway.
CCNA-style Routing & Switching
intermediate
160 XPFix a missing default route
PC-A reaches R1 but not the remote server SRV2 (172.16.0.10).
Network Security
intermediate
170 XPConfigure a basic firewall allow rule
The new web server WEB1 is unreachable from the office LAN. FW1 currently denies everything.
AV-over-IP & Dante
advanced
180 XPTroubleshoot a Dante sample-rate / clock mismatch
Amp-Rack shows its subscription in red and no audio, while Stream-Enc receives fine.
AV-over-IP & Dante
intermediate
180 XPEDID: a 4K source on a 1080p path
The projector stays black when the presentation PC outputs 4K.
AV-over-IP & Dante
intermediate
180 XPHDCP: protected content goes black
The meeting screen shows unprotected presentations but protected playback is black.
AV-over-IP & Dante
intermediate
180 XPHDMI: no picture in the classroom
The projector has power and an HDMI cable, but the selected input is blank.
AV-over-IP & Dante
intermediate
180 XPHDMI-CEC: touch-panel power fails
Touch-panel power does not reach the TV after its Ethernet cable was removed.
AV-over-IP & Dante
intermediate
180 XPGain: a microphone that is too quiet
The courtroom microphone is subscribed, but the output meter is effectively silent.
AV-over-IP & Dante
intermediate
180 XPDante: Shure DSP sample-rate mismatch
The Shure microphone is visible but the room DSP cannot receive audio.
AV-over-IP & Dante
intermediate
180 XPPoE vs PoE+: ceiling microphone offline
The 20 W ceiling microphone has a copper network link but will not power up.
AV-over-IP & Dante
intermediate
180 XPPoE+: exhausted switch power budget
A microphone and touch panel share PoE+ ports, but the total switch budget is insufficient.
AV-over-IP & Dante
intermediate
180 XPQ-SYS: the wrong Dante receive channel
Q-SYS discovers the Shure microphone but receives a channel that does not exist.
AV-over-IP & Dante
intermediate
180 XPCrestron: restore touch-panel binding
The touch panel has power and an IP address, but its configured action fails.
AV-over-IP & Dante
intermediate
180 XPShure: synchronize wireless microphone channels
The wireless handheld is powered, but its receiver produces no audio for the courtroom DSP.
AV-over-IP & Dante
intermediate
180 XPLED: receiving-card canvas mapping
The LED processor receives HDMI, but the wall's receiving-card mapping is missing.
AV-over-IP & Dante
intermediate
180 XPScreen: powered-off display
The HDMI chain is configured, but the TV remains black.
AV-over-IP & Dante
intermediate
180 XPNo microphone: a muted Shure channel
Dante discovery and clock lock work, but the room has no microphone signal.
AV-over-IP & Dante
intermediate
180 XPNo speaker: Phoenix output routing
The DSP has healthy microphone audio, but the Phoenix-connected Sonic speaker is silent.
AV-over-IP & Dante
intermediate
180 XPEcho: missing conference AEC reference
The far end hears echo although microphone routing, gain and speaker cabling are correct.