Hi, jtihng
First , you should check if you've selected the right network adapters , use the right vlan if needed , and if you use an IP address accessible through your network.
Then try to ping the hostname/address, if you can so it means you should access to the ESXi web console or ssh.
If it ping but you still can't access the webconsole or connect to SSH, go in your ESXi (using Local console) , then F2 > Troubleshooting Options and Enable ESXi Shell AND Enable SSH.
Let me know if it helps or not.