A firewall at layer 4 ( a device that can look at all protocol headers up to the transport layer) CANNOT
A. disable HTTP traffic between the hours of 9:00 p.m. and 5:00 A.m.
B. disable all ICMP traffic.
C. block incoming traffic from a specific IP address while allowing outgoing traffic from the same IP address.
D. on a multi-user system, during the hours of 9:00PM and 5:00AM, restrict TCP traffic from a specific user on a specific IP address.
Answer:A
A firewall at layer 4 ( a device that can look at all protocol headers up to the transport layer) CANNOT
A. disable HTTP traffic between the hours of 9:00 p.m. and 5:00 A.m. B. disable all ICMP traffic. C. block incoming traffic from a specific IP address while allowing outgoing traffic from the same IP address. D. on a multi-user system, during the hours of 9:00PM and 5:00AM, restrict TCP traffic from a specific user on a specific IP address.
Explanation: HTTP stands for Hypertext Transfer Protocol at the application layer. The firewall can't block HTTP data because it's on layer 4.