Which two functions can be performed by a local DNS server? (Choose two.)
Click on the arrows to vote for the correct answer
A. B. C. D. E.CD
A local DNS server is a type of DNS server that is configured to serve the DNS queries of clients within a local network. It maintains a database of DNS records that map domain names to IP addresses, allowing clients to resolve domain names to IP addresses.
The two functions that can be performed by a local DNS server are:
Resolving names locally: A local DNS server can resolve domain names to IP addresses for clients within the local network. When a client sends a DNS query to the local DNS server, the server checks its local database for the corresponding IP address and responds to the client with the answer. This eliminates the need for clients to send DNS queries to external DNS servers, which can improve network performance and reduce network traffic.
Forwarding name resolution requests to an external DNS server: A local DNS server can also forward DNS queries to external DNS servers if it does not have the corresponding IP address in its local database. This allows clients to resolve domain names that are not stored in the local DNS server's database. The local DNS server can be configured to forward DNS queries to specific external DNS servers or to use the DNS servers specified in the client's network settings.
Assigning IP addresses to local clients, copying updated IOS images to Cisco switches, and transferring split horizon traffic between zones are not functions performed by a local DNS server. Assigning IP addresses to local clients is typically done by a DHCP server, while copying updated IOS images to Cisco switches is done through the TFTP protocol. Transferring split horizon traffic between zones is a function performed by a firewall or router.