Firewalls
1) Packet filtering firewalls work by examining (Choose one):
A. A packet's source address, destination address, source port, destination port and protocol field/type.
B. A packet's source address, destination address, user name, and password
C. A packet's source port, destination port, user name, and password
D. Whether a packet is encrypted.
E. All of the above.
Answer(s):
2) A packet filtering firewall cannot/do not normally (Select all that apply.):
A. Detect A SYN flood attack.
B. Detect A PING flood attack.
C. Perform User authentication.
D. Deny a specific service from a specific port.
E. Deny a specific service from a specific IP address.
Answer(s):
3) As you increase the security of your network, you are concerned that the added security measures may impact in ways you had not intended. For example, how could a firewall have a negative impact on business from the following list? Explain.
A. It can filter packets from a site known to cause DoS attacks.
B. It can filter packets that have a virus signature.
C. It can block traffic that should be allowed through.
D. It can log every packet that is transmitted.
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4) Available in many operating systems or provided as an add-on package, a ________ is a software module used to secure an individual host and also filters and restricts the flow of packets.
A. application level gateway ?
B. circuit level gateway
C. host based firewall ?
D. DMZ
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5) Which of the following statements are/is true? Select all that apply.
A. Stateful inspection firewalls can detect SYN attacks.
B. Both application-level and circuit-level gateways do not allow a direct end-to-end connection between the connecting parties.
C. Stateful inspection firewalls, circuit-level gateways and application-level gateways provide reactive network defense, whereas packet filtering firewalls provide proactive network defense.
Answer(s):
IPsec and Virtual Private Network Security(VPN)
6) What term refers to the data recipient's ability to ensure that the data was not altered in any fashion as the data was sent across the VPN?
A. Encryption
B. Integrity
C. Authentication
D. Tunneling
Answer(s):
7) What is the transmission of data through a public network in such a way that the routing nodes in the public network are unaware that the transmission is part of a private network?
A. Tunneling
B. Virtual private network
C. Output feedback
D. Promiscuous mode
E. End-to-end connection
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8) In which case an IPsec VPN is generally considered a better solution than an SSL VPN for remote access? Explain.
A. Telecommuters coming from fixed sites, using managed corporate devices and terminating in a secure, private network on either side.
B. Telecommuters without fixed access who want to come in from a variety of sites.
C. Both of the above
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9) Which approach to VPNs is an acceptable solution? Explain.
A. VPN-specific gateway device
B. Router-based
C. Firewall-based
D. Implemented in software
E. All of the above
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10) Which of the following ones is/are true of IPsec? Select all that apply.
A. The transport mode provides protection to the entire IP packet.
B. By implementing security at the IP level an organization can ensure secure networking not only for applications that have security mechanisms but also for the many security ignorant applications.
C. Additional padding may be added to provide partial traffic flow confidentiality by concealing the actual length of the payload.
D. The Payload Data Field is designed to deter replay attacks..
Answer(s):
Wireless Network Security
11) What is the protocol developed for the wireless network security in Layer 2 (data link layer)?
A. Wireless Integrity Protocol (WIP)
B. Wireless Application Protocol (WAP)
C. Wired Equivalent Privacy (WEP)
D. Wireless Session Protocol (WSP)
Answer(s):
12) WEP has been publicized as having vulnerabilities. Which of the following is a reason why it is vulnerable? Select all that apply.
A. Shared WEP keys among all clients
B. An RC4 engine used for cryptography not properly initialized
C. 20-bit initialization vector
D. Access Point (AP) is not authenticated to a device/station.
E. 400-bit (WEP) keys
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13) Which of the following is/are true of WPA TKIP? Select all that apply.
A. Provides better protection than WEP without requiring hardware updates for devices and the AP.
B. It uses RC4 for the core cryptographic algorithm.
C. Provides integrity functions to protect against fragmentation and impersonation attacks.
D. Does not provide replay attack detection.
E. All of the above.
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14) Which of the following is/are true of the security features of WPA CCMP? Select all that apply.
A. Provides better protection than WEP (and WPA TKIP), but requires hardware update for devices and AP.
B. It uses RC4 for the core cryptographic algorithm
C. Provides both message integrity and data origin authentication.
D. Does provide replay attack detection.
Answer(s):
Transport and Web Protocols
15) The SSL Internet standard version is called _________ .
A. SSH ?
B. HTTPS
C. SLP
D. TLS
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16) Which of the following is true of the SSH protocol? Choose all that apply.
A. SSH is a layer 3 (IP layer) protocol.
B. SSH supports multiple authentication schemes including public key authentication.
C. SSH does not provide message integrity, but only provides authentication and message encryption.
D. SSH does not authenticate the server to the client.
Answer(s):
17) Which of the following is true of the HTTPS protocol? Choose all that apply.
A. Supports the verification of the identity of both the server and client
B. Supports confidentially of the HTTP requests and responses using the secret (symmetric) key cryptography.
C. Does not support message integrity.
D. All of the above.
Answer(s):
18) Which of the following is true about web client or server attacks? Choose all that apply.
A. One way to prevent XSS attacks is to disable client side scripts.
B. Banks and financial institutions try to minimize CSRF (Cross-Site Request Forgery) attacks by requiring re-authentication before every security-critical operations such as money transfer or withdrawal.
C. Lack of input validation is the main reason for SQL injection attacks.
D. All the above.
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