Proxy Servers, VPNs, and Secure Network Communication NDE Practice Questions (Page 4)

Questions 16–20

1. 16application · medium

   A small business deploys a forward proxy for employee internet access. They notice that some employees are using the proxy to bypass the firewall and access blocked content, and the proxy logs show connections from unknown external IPs. What is the most likely cause and the best immediate remediation?

   • AEmployees are using a VPN; disable VPN access for all users
   • BThe firewall is blocking proxy traffic; reconfigure the firewall to allow all ports
   • CThe proxy is overloaded; add more bandwidth to improve performance
   • DThe proxy is misconfigured as an open proxy; restrict access to authenticated internal users only
   Reveal Solution Discussion Select an answer first
2. 17foundation · easy

   Which security principle is primarily concerned with ensuring that only authorized parties can read the data?

   • ANon-repudiation
   • BConfidentiality
   • CIntegrity
   • DAvailability
   Reveal Solution Discussion Select an answer first
4. 18application · medium

   A company needs to set up a VPN that provides the strongest confidentiality for data in transit. The VPN will carry sensitive financial data over the internet. Which protocol feature is most important to ensure confidentiality?

   • AStrong encryption algorithm such as AES-256
   • BCertificate-based authentication
   • CIntegrity checking with SHA-256
   • DFast key exchange such as ECDHE
   Reveal Solution Discussion Select an answer first
5. 19application · medium

   A field technician needs to securely access internal file shares and a database from a hotel Wi-Fi network. The company requires that all traffic between the laptop and the internal network be encrypted and that the technician authenticate with a company-issued certificate. Which solution should be implemented?

   • ARemote-access VPN using IPsec with certificate-based authentication
   • BReverse proxy with basic authentication
   • CSite-to-site VPN between the hotel and the office
   • DForward proxy with SSL inspection
   Reveal Solution Discussion Select an answer first
6. 20foundation · easy

   How can a proxy server and a VPN be combined to enhance privacy?

   • AThe proxy encrypts traffic, and the VPN compresses it
   • BThe proxy replaces the VPN, so no combination is needed
   • CThe VPN provides caching, and the proxy provides encryption
   • DThe VPN encrypts traffic, and the proxy can hide the fact that a VPN is being used
   Reveal Solution Discussion Select an answer first