Unit 12

(Choose true or false). A main difference between internetworks and WANs is the distance between the LANs being connected.

According to the TCP/IP model, WANs operate at which layer?

Application

b. Network

Transport

Internetwork

According to the OSI model, WANs operate at which layer(s)?

Application & Presentation

b. Network

c. Transport

d. Data Link and Physical

A ______________ is a series of binary 1s and 0s represented by some type of signal that has two possible states (0v or 5v)

Analog signal

Numerical signal

c. Digital signal

d. Phone signal

(choose true or false) A channel service unit/data service unit is a device that creates a digital connection between a LAN device (router) and the WAN link from the service provider

6. The oldest WAN approach, which uses the public switched telephone network, and which creates a temporary dedicated connection between sender and receiver on demand is known as a ______ WAN.

a. Circuit switched

b. Leased line

Packet-switched

VPN over the Internet

7. Represents a set of communication standards for digital telephone connections, enabling he transmission of voice and data over a digital line.

Packet-switched technology

b. ISDN technology

c. Leased line technology

d. VPN over the Internet technology

8. This type of WAN connection method, provides a permanent, dedicated, expensive, and secure point-to-point connection from the customers LAN through the providers network and the destination network

a. Circuit switched

b. Leased line

c. Packet-switched

d. VPN over the Internet

9. (choose true or false) The leased line WAN connection should be considered when there is a mission-critical application that needs fast upstream and downstream communication

True

10. A method of transmitting two or more signals over the same medium. The signals are interleaved with those of the other signals and transmitted as a continuous stream.

a. Wavelength division multiplexing

b. Frequency division multiplexing

c. Time division multiplexing

d. Period division multiplexing

A logical connection created between two devices, mapped trough switches in a shared network is known as a:

Simulated circuit

Cyber circuit

c. Virtual circuit

d. Emulated circuit

12. What is the term given to the cell-based packet switching technology used in WANs, which uses cells of a fixed length for backbone and infrastructure in large communications companies?

a. Backbone infrastructure transfer mode

b. Multiprotocol Label Switching mode

c. Asynchronous Transfer Mode

d. Cell-based switching mode

13. Using VPN connections over inexpensive Internet connections is a popular WAN alternative. Name two VPN advantages over other WAN methods.

Convenience

Security

14. The generic term for the WAN customer equipment thats usually the responsibility of the customer and includes routers, modems and CSU/DSUs is known as:

a. Customer Premises Equipment

b. Client Premises Equipment

c. Resident Premises Equipment

d. Customer Building Equipment

15. In reference to provider provided WAN equipment, the connection between the demarcation point and the CO is called the?

Established loop

b. Local loop

c. Embedded loop

d. Demarcation point loop

16. (choose true or false) Through the Windows server software, users can create dial-up or VPN network connections to a remote access server.

17. When making a dial-up connection onto a WAN, the ______________ sets up the Point-to-Point Protocol connection and defines communications parameters

a. Network Control Protocol

b. Link Control Protocol

c. Dial-up control protocol

d. Association control protocol

18. A networking model in which emote servers hosted on the Internet are used by companies to store, manage, and process data, is known as:

a. Cloud computing

b. High-level computing

c. External computing

d. Peripheral computing

19. Name two benefits of using the cloud.

Reduced physical plant costs

Reduced upfront costs

Reduced personnel costs

20. In reference to the main categories of Cloud computing, Google Apps is an example of:

a. Software as a service (SaaS)

b. Platform as a service

Infrastructure as a service

Framework as a service

21. In reference to the main categories of Cloud computing, when customers use the service providers tool and infrastructure as they develop their applications, this is known as:

a. Software as a service

Infrastructure as a service

c. Platform as a service

d. Framework as a service

22. In reference to the main categories of Cloud computing, when a customer needs more storage space or more processing, they just pay for the additional requirements. This is known as:

a. Software as a service

b. Infrastructure as a service

c. Platform as a service

d. Framework as a service

Part 4 - Additional Questions

Which protocol is used for dial-up and to create VPNs?

Point-to-point protocol

Point-to-point Tunneling protocol

Link Control Protocol

Network Control Protocol

Part 5

Please complete the following questions from pages 449-452. (1 point each)

1. For what purpose is a CSU/DSU used?

Modulates a digital signal into an analog signal

Creates a digital connection between a LAN device and the WAN link

Routes packets from the LAN to the WAN

Creates a WAN connection over the public switched telephone network

2. Which term best describes the place in a WAN connection where the customers responsibility ends and the providers responsibility begins?

Data circuit-terminating equipment

Demarcation point

CPE

Central office

3. Which of the following can best be described as developing applications by using a service providers development tools and infrastructure?

Hosted applications

Hosted networking

Hosted platforms

Hosted infrastructure

4. Which wireless WAN technology has a standard for fixed and mobile devices?

WiMAX

LTE

Satellite

LTE-Advanced

5. Which wireless WAN technology might not be suitable for voice applications because of latency?

WiMAX

LTE

Satellite

LTE-Advanced

Part 6

Please open the following web site (3 points). Answer the following questions:

How Cloud Computing Works: http://computer.howstuffworks.com/cloud-computing/cloud-computing.htm

1.The author of the article discusses the two sections of cloud computing: front end and back end. Differentiate between those two.

The front end is the side of the computer user or client sees. The back end is the cloud section of the system.

2.In reference to clients and also the back end of the cloud, the purpose of ______ is to allows networked computers to communicate with each other.

a.Intermediate-ware

b.Client-ware

c. Middle-ware

d. Central-ware

3.One way a hacker can cause cloud computing companies a major headache is to records a clients key strokes. This software is known as _______ software:

a. Logging

b. Key logging

c. Stroke logging

d. Strategic logging