1.

Which of the followingstatements is true regarding Supervisory Control and DataAcquisition Networks?

a.

SCADA devices arebecoming less widely used.

b.

Use of an applicationproxy, and remote log correlation and analysis are two ways toprotect SCADA networks from attacks.

c.

An attack on a SCADAnetwork cannot cause much damage, but may reduce efficiency of thesystems they control.

d.

Because they aresimple, these networks are not vulnerable to attacks.

2.

Which of the followingprotocols have organic security mechanisms used to prevent attacks?(Select all that apply.)

	a.	IPv4
	b.	ICMP
	c.	IPv6
	d.	UDP
	e.	ARP

3.

Select all statementsthat correctly describe network packet filtering at the IP layer?(Select all that apply)

	a.	IP packet filteringmay either be applied to the perimeter of a network or to theindividual hosts within a network, but it cannot be applied to bothat the same time.
	b.	IP packet filteringdetermines which IP packets may flow into or out of a network or acomputer.
	c.	Most IP packetfiltering firewalls determine what to filter based upon the IPheader fields.
	d.	Most IP packetfiltering firewalls determine what packets to filter based upon aset of rules which can be configured for a particular network orhost.