What are two common devices that control outbound network access?
Well, generally devices such as routers and firewalls are used to control outbound network access. Routers have the ability to act as stateless inspection devices. A router can be configured to use an access control list (ACL). An ACL can be used to block or allow certain types of traffic. Firewalls are like ACL's but have the ability to act as stateful inspection. This is a much more advanced type of firewall. Where ACL's can only be used to look at the headers of packets, stateful inspection monitors the state of active connections and can look inside the packet to determine what to allow through the firewall.
This was last published in December 2009
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