Module 3 - Network Security Concepts

The IT department is reporting that a company web server is receiving an abnormally high number of web page requests from different locations simultaneously. Which type of security attack is occurring?

• spyware

• phishing

• DDoS

• social engineering

• adware

What causes a buffer overflow?

• downloading and installing too many software updates at one time

• attempting to write more data to a memory location than that location can hold

• sending too much information to two or more interfaces of the same device, thereby causing dropped packets

• sending repeated connections such as Telnet to a particular device, thus denying other data sources

• launching a security countermeasure to mitigate a Trojan horse

Which objective of secure communications is achieved by encrypting data?

• authentication

• confidentiality

• integrity

• availability

What type of malware has the primary objective of spreading across the network?

• virus

• botnet

• Trojan horse

• worm

Which algorithm can ensure data confidentiality?

• MD5

• PKI

• AES

• RSA

What three items are components of the CIA triad? (Choose three.)

• confidentiality

• integrity

• availability

• scalability

• access

Which cyber attack involves a coordinated attack from a botnet of zombie computers?

• address spoofing

• ICMP redirect

• DDoS

• MITM

What specialized network device is responsible for enforcing access control policies between networks?

• firewall

• switch

• IDS

• bridge

To which category of security attacks does man-in-the-middle belong?

• DoS

• access

• reconnaissance

• social engineering

What is the role of an IPS?

• to detect patterns of malicious traffic by the use of signature files

• to enforce access control policies based on packet content

• to filter traffic based on defined rules and connection context

• to filter traffic based on Layer 7 information