Identify which of the services below uses both TCP and UDP ports.Group of answer choicesFTPTFTPDNSSSHTelnet

The service that uses both TCP and UDP ports is DNS (Domain Name System).

Here's a step-by-step explanation:

1. FTP (File Transfer Protocol): This service uses TCP ports. It uses TCP because it requires a reliable connection for transferring files, which TCP provides.

2. TFTP (Trivial File Transfer Protocol): This service uses UDP ports. It uses UDP because it is designed for simplicity and speed, not reliability, which is what UDP provides.

3. DNS (Domain Name System): This service uses both TCP and UDP ports. It primarily uses UDP for speed, but it can use TCP when the data to be transferred is too large for a single UDP packet, or for tasks that require reliable connection, such as zone transfers.

4. SSH (Secure Shell): This service uses TCP ports. It uses TCP because it requires a reliable connection for secure remote administration, which TCP provides.

5. Telnet: This service uses TCP ports. It uses TCP because it requires a reliable connection for bidirectional interactive text-oriented communication, which TCP provides.