UTM consists of a firewall handling all traditional firewall functions (SPI, ACLs, etc.) as well as additional security functions such as antivirus filtering, spam filtering, application proxy filtering.
Explanation:
The term UTM stands for Unified Threat Management
A traditional firewall is defined as a device that can control the flow of traffic that is allowed to enter or exit a point within the network.
The  technique  of traffic monitoring means that the firewall just keep a check over each  data packet  individually without disturbing  the “flow” of traffic
Few Example of the fire wall used by  small business houses are  -Fortinet, Ubiquiti EdgeRouter, Cisco NGFW, OPNSense.
