Question 62

DNS server

Changing the DNS server setting on the client's router is essential to enable the functionality of blocking malicious sites. This is because the service relies on DNS resolution to determine whether to allow or block access to certain websites.

A) DNS server

This option is correct as it directly relates to the functionality of the service purchased by the user. By changing the DNS server settings to those provided by the subscription service, the router can effectively prevent the resolution of malicious sites, thus blocking them.

B) Port forwarding

Port forwarding is not relevant in this scenario as it deals with directing incoming traffic on specific ports to designated devices within a network. It does not affect DNS resolution or the ability to block malicious sites.

C) Perimeter network

A perimeter network, or DMZ, is used to add an additional layer of security by isolating external-facing services. Changing this setting does not influence the DNS resolution process or the blocking functionality of the malicious site service.

D) Universal PnP

Universal Plug and Play (UPnP) facilitates device discovery and communication on a local network. However, it does not pertain to DNS settings or the blocking of malicious sites, making it an irrelevant option.

E) DHCP server

The DHCP server is responsible for assigning IP addresses to devices on the network. While important for network configuration, altering this setting will not enable the DNS-based blocking of malicious sites.

Conclusion

The correct answer, DNS server, is crucial for implementing the service that blocks malicious sites, as it directly impacts how web addresses are resolved. Other options, while relevant in networking contexts, do not influence the ability to block sites through DNS resolution, making them unsuitable choices for the user's need.