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Intranets and Virtual Private Networks (VPNs)

Table of Contents:
Definition and Overview
1. Introduction
2. Benefits of ISP–Based Private Networks
3. Traditional WAN Network Architecture
4. Encryption-Based VPNs
5. Private Networking Using Frame-Relay PVCs
Self-Test
Glossary
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Self-Test
1. Private networking refers to which of the following?
a. different types of network firewalls
b. networking where network protocols are not used
c. securely transmitting corporate data
d. accessing Web servers using the HTTP protocol
2. A VPN is which of the following?
a. an implementation of a private network
b. a network built using frame-relay technology
c. a high-speed network protocol
d. a standard way to encrypt files for secure transmission
3. Corporate networks are now challenged because of which of the following?
a. computer equipment requires a greater amount of storage space
b. centrally located computers are consuming greater amounts of electrical power
c. multiple protocols are taxing existing network resources
d. the need to support a wide variety of communications across a large geographic area
4. Traditional WAN architecture ___________________.
a. is growing because it ideally meets corporate network needs
b. is a low-cost solution to a wide variety of needs
c. is less flexible and more costly to implement
d. improves data transmission over long distances
5. Remote access modems require which of the following?
a. increased equipment and management resources
b. minimal equipment and network resources
c. no additional long-distance charges
d. that telecommuters use specific remote-access hardware to access the internal network
6. ISP–based private networks _________________.
a. require entirely new server and internal-network equipment
b. are a cost-effective alternative to traditional WANs
c. increase management costs as a result of additional network equipment
d. are more secure than traditional WANs
7. Compared to a single corporation, ISPs tend to have which of the following?
a. fewer remote-access dial-up ports
b. greater diversity in local remote-access points
c. minimal international remote-access capabilities
d. a smaller, more concentrated network backbone
8. Compared to a WAN, an ISP–based private network ___________________.
a. costs more due to the additional cost of a diverse network backbone
b. offers significant cost savings
c. offers a greater level of security and network performance
d. requires a greater number of dedicated leased-line circuits
9. Internal network management resources _____________________.
a. must be increased when using an ISP–based private network, as a result of Internet security issues
b. are still required when using an ISP–based private network to support network technologies including POTS, ISDN, and leased-line circuits
c. can be decreased when using an ISP–based private network due to the outsourcing of network management
d. never change regardless of private-network type
10. Traditional WANs are built using which of the following?
a. multiple dial-up links interconnecting each office location
b. short leased-line circuits connecting each office to its closest neighbor
c. inexpensive wireless network–transmission technologies
d. expensive, distance-sensitive leased-line circuits
11. International WANs are which of the following?
a. extremely expensive as a result of distance-sensitive leased-line circuits
b. impossible to build using traditional WAN technologies
c. inexpensive because corporations can share network costs with other corporations
d. built using satellite technology, which limits network performance
12. Encryption-based VPNs ___________________.
a. use the public Internet infrastructure to create a VPN
b. use inexpensive hardware to encrypt data traveling across the Internet
c. are more secure than traditional WANs due to data encryption
d. are not susceptible to Internet weaknesses and outages
13. Encryption-based VPNs _______________________.
a. require encryption hardware only at the primary headquarters location
b. cannot accommodate dial-up remote-access users
c. require an encryption equipment at each location of the network
d. aggregate network traffic through a central location
Glossary >>

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