COMPUTER THREATS SECURITY
WHAT IS A FIREWALL IN NETWORK SECURITY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
continue passing all packets but slow operation
|
|
|
drop packets it cannot process
|
|
|
pass any packets it cannot filter
|
|
|
shut down, failing safely
|
Detailed explanation-1: -Firewalls do not stop provable attack packets. Antivirus servers can only find viruses, not other types of malware. Centralized firewall management systems automatically create ACLs from policies.
Detailed explanation-2: -A firewall functions analogously, looking at each packet of data to determine where it came from and where it is going, or both, and deciding if the packet should be accepted and allowed to continue on its way or if it should be denied or dropped.
Detailed explanation-3: -firewalls stop provable attack packets. If a packet is not a provable attack packet, the firewall cannot drop it. IDSs, in turn, identify suspicious packets that may or may not be parts of attacks.
Detailed explanation-4: -A stateful firewall keeps track of the state of communications sessions. It monitors the incoming and outgoing packets in each TCP connection.