Question: The / etc / services file may be used by firewalls for what purpose? A To map a service name to a port and protocol

The /etc/services file may be used by firewalls for what purpose?
A To map a service name to a port and protocol
B To store their ACL rules
C To designate what remote services to block
D To designate what local services can send out packets
To determine if the port can be accessed
The / etc / services file may be used by

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