Networking Pro Ch 7

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Which of the following terms identifies the network of the dial-up telephone and the long-distances lines?


Which of the following correctly describes the T1 carrier system?

A single T1 channel can transfer data at 64 bps. T1 lines use two pairs of copper wire.

Which of the following technologies uses variable-length packets and adds labels to packets as they enter the WAN cloud, with the labels being used to switch packets and prioritize traffic?


Which of the following is a WAN technology that allows for interoperability of vendor hardware for fiber optic networking?


If SONET (OC-1) base data rate is 51.84 Mbps, how much data can the Optical Carrier level 12 (OC-12) transfer in one second?

622.08 Mb

Which type of network divides data to be transmitted into small units and then routes these units from the originating system to the destination system, allowing multiple, concurrent communications on the network medium?


You have a site in your network that is connected to multiple other sites. A single virtual circuit is used to connect to all other sites.
What type of connection is being used?


You are implementing Internet connectivity for a new start-up company. Your client will provide on-line storefronts for retailers. To do this, the have calculated their Internet connection must provide a data rate of at lest 20 -30 Mbps.
Which type of service should you implement?


Which of the following describes the lines used in the local loop for dial-up telephone access?


You have a series of WAN links that connects your site to multiple other sites. Each remote site is connected to you site using a dedicated link.


Which of the following are characteristics fo ATM?

Adds labels to data units Uses fixed-length cells of 53- bytes

What is the speed of the OC-3 connection?

155 Mbps

Which of the following are characteristics of MPLS?

Adds labels to data units Supports variable-length data units

What must you install between your network and a T1 line for your networks to use the T1 line?


Which type of network establishes a dedicated physical connection between two hosts who need to communicate on the network, not allowing any other host to use the medium until the communication is complete?


Which of the following devices is used on a WAN to convert synchronous serial signals into digital signals?


Which of the following are characteristics of SONET?

Dual counter-rotating fiber optic rings Transport protocol used for other traffic types (such as ATM

A health care organization provides mobile clinics throughout the world. Which network technology connectivity for any clinic located anywhere in the world, ever remote areas?


To access the internet through the PSTN, what kind of connectivity device must you use?


Which of the following is a characteristic of SDSL?

Supports data traffic only (No Voice)

Which of the following are characteristics of VDSL?

Supports both data and voice at the same time unequal down and upload speeds

Which of the following internet services provides equal upload and download bandwidth?


Which of the following Internet connection technologies requires that the location be within a limited distance of the telephone company central office?


You are traveling throughout North America to many metropolitan and rural areas. Which single form of Internet connectivity provides the greatest potential connectivity wherever you travel?


Which of the following is most susceptible to interference related to atmospheric conditions?


Which two of the following describe the channels and data transfer rates used for ISDN BRI?

One D channel operating at 16 kbps Twp B channel operating at 64 kbps each

What is the maximum data rate of an ISDN BRI line?

128 Kbps

Which of the following services are available regardless of whether the telephone company network is available?

Cable modem

Which three of the following are characteristics of ISDN?

It lest you transmit voice, video, and data over the same lines. It provides enough bandwidth to transmit data at much higher speeds than standard modems and analog lines. It is a dial-up service that uses existing copper wires for the local loop.

Which WAN connection type use digital communications over POTS?


Which of the following are characteristics of TACACS+

Allow for the possible of three different servers, one each for authentication, authorization, and accounting Uses TCP

You often travel away form the office. While traveling, you would like to use a modem on your laptop computer to connect directly to a server in your office and access files on that server that you need.
You wan the connection to be as secure as possible. Which type of connection will you use?

Remote Access

Which of the following are differences between RADIUS and TACACS+?

RADIUS combines authentication and authorization into a single function: TACACS+ allows these services to be split between different servers.

You want to set up a service to allow multiple users to dial in to the office server form modems on their home computers. Which service should you implement?

RAS or Remote Access Service

You have just signed up for internet access using a local provider that gives you fiber optic line into you house form there, Ethernet and wireless connections are used to create a small network within your home.
Which of the following protocols would be used to provide authentication , authorization, and accounting for the internet connection?


Which of the following are methods for providing centralized authentication, authorization, and accounting for remote access?


You are configuring your computer to dial up to the internet. What protocol should you use?

PPP or Point-to-Point Protocol

You have decided to implement a remote access solution that uses multiple remote access servers. You want to implement RADIUS to centralize remote access authentication and authorization.
Witch of the following would be required pare of your configuration?

Configure the remote access servers as RADIUS clients.

Which of the following is a platform independent authentication system that maintains a database of user accounts and passwords that centralizes the maintenance of the accounts?


Which of the following protocols or services is a commonly used on cable internet connections for user authentication?


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