I had the “nested” question (wording has been different). Two answers ware related to hierarchy:

With which type of Layer 2 attack can you intercept traffic that is destined for one host?

With which technology do apply integrity, confidentially and authenticate the source

Which type of attack is directed against the network directly:

What does the key length represent

Where OAKLEY and SKEME come to play? (on the exam the question asked about inside ISAKM protocol)

What show command can see vpn tunnel establish with traffic passing through.

Which filter uses in Web reputation to prevent from web based attackts (somthing similar)?

Diffie-Hellman key exchange question

Which port should (or would) be open if VPN NAT-T was enabled