Hi, everyone. I'm somewhat new to the networking and security side of things and I'm trying to wrap my head around some concepts. I've worked in telecommunications for a number of years (field technician) and have had some exposure but I've decided to take the leap and self-study my way into the realm of security. I'm close to taking my A+ cert currently to start climbing that ladder but if someone would be so kind to help me understand a few concepts better it would be much appreciated.
- When incoming data is sent to a gateway/router, attemping to reach a client that has had no previous request sent for such data, how does the gateway handle that incoming traffic? Is it the job of a Firewall to prevent those frames from entering the network or is the data forwarded to the client regardless? If so, how does a client handle unsolicited incoming traffic? Is it dependent on whether client is listening on that port?
- How is unsolicited incoming data "dropped" by a network or device? Are those electrical pulses dumped onto a grounding wire?
(Attempt at an example if it helps..)
SERVER_A is sending a HTTP response to HOST_A over the internet, though HOST_A never made a request for it. What happens?
Sorry if these questions seem "elementary". Thank you for taking the time to read and respond!
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