Firewalls

c) Choose the best answer from the following options about the description of a firewall: A) Firewalls statefully inspect reply packets to determine whether they match the expected state of a connection in the state table. B) Firewalls statically inspect packets in both directions and filter on layer 3and layer 4 information. C) A firewall is any device that blocks access to a protected network. D) A firewall is a system or a group of systems that enforce an access control policy between two networks. E) None of the above

d) For a stateful packet-inspection firewall, which information is stored in the connection flow table? A) TCP control header and trailer information associated with a particular session. B) Inside private IP address and the translated inside global IP address. C) Outbound and inbound access rules (ACL entries). D) Source and destination IP addresses, and port numbers and sequencing information associated with a particular session. E) TCP SYN packets and the associated return ACK packets.