$($d$)$ In IPsec, authentication must be applied to the sections of the original IP packet.

$($e$)$ The principal feature of IPsec is that it can encrypt and$/$or authenticate all traffic

at the IP level.

$($f$)$ A stateful packet inspection firewall reviews the same packet information as a

packet filtering firewall but also records information about TCP connections.

$($g$)$ Packet filter firewalls examine upper layer data therefore they can prevent attacks

that employ application specific vulnerabilities or functions.

$($h$)$ The change cipher spec protocol exists to signal the transition in ciphering strategies.

$($i$)$ Transport mode in IPSec provides security to the entire IP packet.

$($j$)$ In tint fragment attack, it is possible for an intermediate fragment to pass through

filter before the initial fragment is rejected.