What are two roles of a DNS?

The Domain Name System (DNS) has several key roles, including:

Storing the IP addresses associated with domain names.

Translating human-readable domain names (aliases) into IP addresses that computers use to identify each other on the network.

The other options:

Creating IP addresses if it cannot find an alias is incorrect; DNS does not create IP addresses.

Sending packets along a pathway that connects it to the Internet is the role of routers and not DNS.

Therefore, storing the IP address and translating an IP alias to an actual IP address are the correct roles of DNS.