Which of the following is a client-server tool utilized to evade firewall inspection?

tcp-over-dns works by encoding TCP session data inside DNS query and response packets, which most firewalls permit outbound on UDP/TCP port 53. Because firewalls typically do not perform deep inspection of DNS traffic, this technique allows an attacker or tester to establish a covert channel that evades perimeter controls. It requires both a client component inside the restricted network and a server component on an external DNS-enabled host.

Kismet is a passive wireless network detector and packet sniffer; it does not tunnel traffic or evade firewalls.

Nikto is an open-source web server vulnerability scanner that probes HTTP/HTTPS targets; it is not a tunneling or firewall evasion tool.

hping is a packet crafting and network testing tool used for tasks like port scanning and firewall testing, but it is not a client-server tunneling solution designed to evade firewall inspection.