Explanation
A transparent proxy is a type of web proxy that intercepts and redirects HTTP and HTTPS requests without requiring any configuration on the client browser . The firewall acts as a gateway between the client and the web server, and performs security checks on the traffic.
A transparent proxy can be configured on PAN-OS 11.0 firewalls by performing the following steps1:
* Enable Web Proxy under Device > Setup > Services
* Select Transparent Proxy as the Proxy Type
* Configure a Service Route for Web Proxy
* Configure SSL/TLS Service Profile for Web Proxy
* Configure Security Policy Rules for Web Proxy Traffic
By configuring a transparent proxy on PAN-OS 11.0 firewalls, an organization can migrate from their existing web proxy architecture without changing their network topology or client settings2. The firewall will maintain the same type of traffic flow as before, where HTTP and HTTPS requests contain the IP address of the web server and the client browser is redirected to the proxy1.
Answer A is not correct because DNS proxy is a type of web proxy that intercepts DNS queries from clients and resolves them using an external DNS server3. This type of proxy does not redirect HTTP or HTTPS requests to the firewall.

Explanation
Example output:
> show system state filter-pretty sys.s1.p1.phy
sys.s1.p1.phy: {
link-partner: { },
media: CAT5,
type: Ethernet,
}
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