- (Exam Topic 1)
The simplest form of a firewall is a packet filtering firewall. Typically a router works as a packet-filtering firewall and has the capability to filter on some of the contents of packets. On which of the following layers of the OSI reference model do these routers filter information? Each correct answer represents a complete solution. Choose all that apply.

1. A. Transport layer
2. B. Physical layer
3. C. Data Link layer
4. D. Network layer

Correct Answer: AD

- (Exam Topic 2)
Which of the following keys are included in a certificate revocation list (CRL) of a public key infrastructure (PKI)? Each correct answer represents a complete solution. Choose two.

1. A. A foreign key
2. B. A private key
3. C. A public key
4. D. A primary key

Correct Answer: BC

- (Exam Topic 2)
Which of the following describes the acceptable amount of data loss measured in time?

1. A. Recovery Consistency Objective (RCO)
2. B. Recovery Time Objective (RTO)
3. C. Recovery Point Objective (RPO)
4. D. Recovery Time Actual (RTA)

Correct Answer: C

- (Exam Topic 1)
Which of the following electrical events shows a sudden drop of power source that can cause a wide variety of problems on a PC or a network?

1. A. Blackout
2. B. Power spike
3. C. Power sag
4. D. Power surge

Correct Answer: A

- (Exam Topic 2)
Which of the following methods for identifying appropriate BIA interviewees' includes examining the organizational chart of the enterprise to understand the functional positions?

1. A. Executive management interviews
2. B. Overlaying system technology
3. C. Organizational chart reviews
4. D. Organizational process models

Correct Answer: C