International Engineering Consortium
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Virtual Private Networks (VPNs)

Self-Test
1. A VPN uses the open, distributed infrastructure of the Internet to transmit data between corporate sites.
a. true
b. false
2. One drawback to VPNs is that although they allow network managers to connect to remote-branch offices, they do not enable remote access for individual employees.
a. true
b. false
3. VPNs are a bit more expensive than other communications methods (such as leased lines and long-distance calls) but offer more benefits to the user in the long run.
a. true
b. false
4. Two primary concerns when deploying VPNs over the Internet are security and performance.
a. true
b. false
5. In VPN, virtual implies that the network is static.
a. true
b. false
6. VPNs must provide which critical function to ensure security for data?
a. authentication
b. access control
c. confidentiality
d. data integrity
e. none of the above
f. a, b, c, and d
7. Among the protocols suggested for creating VPNs over the Internet are the following:
a. PPTP
b. L2F
c. L2TP
d. IPSec
e. b and c only
f. a, b, c, and d
8. _____ differs from PPTP in that it allows tunnels to support more than one connection.
a. L2F
b. IPSec
c. L2TP
d. none of the above
e. a, b, c, and d
9. How can key exchange and management be handled within IPSec's architecture?
a. manual keying
b. remote keying
c. Internet key exchange
d. all of the above
e. a and c only
10. What are the main components of an Internet-based VPN?
a. the Internet
b. security gateways
c. security-policy servers
d. certificate authorities
e. all of the above
f. a and b only

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