500
A host is accessing an FTP server on a remote network. Which three functions are performed by intermediary network devices during this conversation? (Choose three.)
1. regenerating data signals,
2. acting as a client or a server,
3. providing a channel over which messages travel,
4. applying security settings to control the flow of data,
5. notifying other devices when errors occur
serving as the source or destination of the messages
What is 1,4,5