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bird cao
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1. What type of firewall will you use to the validate the application protocol of a network communication?
a. SSL
b. Packet Filters
c. Stateful packet Filters
d. Proxy
please make some explaination.
 
Cheers Prasad
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1. What type of firewall will you use to the validate the application protocol of a network communication?
a. SSL
b. Packet Filters
c. Stateful packet Filters
d. Proxy
please make some explaination

I think answer is d) proxy
SSL is not right since SSL is for secure HTTP connection between server and client.
Packet filters - filters at TCP/IP level ,it filters based on port number and destinations.
Similarly stateful packet filter is packet filtes which remembers the state.
Only proxy firewall can filter at application level since it can read the content/application data from the request and can modify if needed,where as packet and stateful filters cannot read the application data.
cheers,
prasad
 
It is sorta covered in the JavaRanch Style Guide.
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