Term
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Definition
A signal, represented by a sine wave, that varies over time continually and
smoothly. |
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Term
| Asynchronous Transfer Mode (ATM) |
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Definition
A high-speed, cell-based packet-switching technology
designed for both LAN and WAN use; uses connection-oriented switches to allow senders
and receivers to communicate over a network. |
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Term
| Basic Rate Interface (BRI) |
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Definition
An ISDN format that consists of two 64-Kbps B-channels and a
16-Kbps D channel; generally used for remote connections. See also Integrated Services
Digital Network (ISDN). |
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Term
| channel service unit/data service unit (CSU/DSU) |
|
Definition
A device that creates a digital connection
between a LAN device, such as a router, and the WAN link from the service provider. |
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Term
|
Definition
A type of WAN connection in which a temporary dedicated
connection is established between sender and receiver on demand. |
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Term
|
Definition
A networking model in which data, applications, and processing power
are managed by servers on the Internet, and users of these resources pay for what they use
rather than for the equipment and software needed to provide resources. |
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Term
| Committed Information Rate (CIR) |
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Definition
A guaranteed minimum transmission rate offered by the
service provider |
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Term
| Customer premises equipment (CPE) |
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Definition
The equipment at the customer site that’s usually the
responsibility of the customer. |
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Term
| data circuit-terminating equipment (DCE) |
|
Definition
The device that sends data to (and receives data
from) the last mile; usually a CSU/DSU or modem. See also channel service unit/data service
unit (CSU/DSU) and last mile. |
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Term
| data terminal equipment (DTE) |
|
Definition
The device that passes data from the customer LAN to the
DCE; usually a router. See also data circuit-terminating equipment (DCE). |
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Term
|
Definition
The point at which the CPE ends and the provider’s responsibility
begins. See also customer premises equipment (CPE). |
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Term
|
Definition
The Windows software component (beginning with Windows
95) for setting up a connection to an RRAS server or connecting computers to ISPs for
dial-up Internet access. |
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Term
|
Definition
Represented as a square wave, a signal that uses binary 1s and 0s to represent
two possible states. |
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Term
|
Definition
The term used to describe a T-carrier line in which portions are dedicated for
different purposes. See also T-carrier lines. |
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Term
|
Definition
A PVC packet-switching technology that offers WAN communication over a
fast, reliable, digital link. Throughput is usually improved because error checking is done on
endpoint devices instead of on the digital link. See also permanent virtual circuits (PVCs). |
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Term
| Infrastructure as a Service |
|
Definition
A category of cloud computing in which a company can use a
provider’s storage or virtual servers as its needs demand; also called infrastructure as a
service (IaaS). |
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Term
| Integrated Services Digital Network (ISDN) |
|
Definition
A digital WAN technology developed to replace
the analog phone system. It defines communication channels of 64 Kbps and is most often
used by OSHO users. |
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Term
|
Definition
The connection between a WAN’s demarcation point and the central office (CO);
also called the local loop. See also demarcation point. |
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Term
|
Definition
A device that converts a sending computer’s digital signals to analog signals for
transmission over phone lines and then converts analog signals to digital signals for the
receiving computer. |
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Term
|
Definition
A technology that supports simultaneous communication links over the same
set of cables, so data transmissions from several sources can be combined and delivered over
a single cable. |
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Term
| Multiprotocol Label Switching (MPLS) |
|
Definition
A highly scalable, flexible WAN technology
that works with any Network-layer protocol and is independent of the Data Link layer
technology; used exclusively in IP networks. It creates a connection-oriented virtual circuit,
using labels assigned to each packet that make it unnecessary to view packet contents. |
|
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Term
|
Definition
A type of WAN network in which data is transmitted in frames or
packets, and each packet is transmitted through the provider’s network independently.
Instead of having a dedicated circuit over which data travels, a provider’s customers share
the bandwidth. |
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Term
| permanent virtual circuits (PVCs) |
|
Definition
Pathways between two communication points that are
established as permanent logical connections; therefore, the pathway exists even when it’s
not in use. See also virtual circuit. |
|
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Term
| Platform as a Service (PaaS) |
|
Definition
A category of cloud computing in which a customer develops applications
with the service provider’s development tools and infrastructure; also called platform as a
service (PaaS). After applications are developed, they can be delivered to the customer’s
users from the provider’s servers. |
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Term
| Point-to-Point Protocol (PPP) |
|
Definition
A remote access protocol that supports many protocols and is
used to carry data over a variety of network connections. |
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Term
| Primary Rate Interface (PRI) |
|
Definition
An ISDN format that consists of 23 64-Kbps B-channels and
one 64-Kbps D-channel. See also Integrated Services Digital Network (ISDN). |
|
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Term
|
Definition
| Cloud services that a company delivers to it's own employees |
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Term
|
Definition
| Cloud services delivered by a third party provider. |
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Term
|
Definition
| A type of connector for terminating a T1 line that provides diagnostic testing for troubleshooting the connection. |
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Term
| Software as a Service (SaaS) |
|
Definition
| A category of cloud computing in which the customer pays for the use of applications that run on a service providers network; also called 'hosted applications' |
|
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Term
| switched virtual circuits (SVCs) |
|
Definition
A communication circuit that’s established when needed
and then terminated when the transmission is completed. See also virtual circuit. |
|
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Term
| Synchronous Optical Network (SONET) |
|
Definition
A flexible, highly fault-tolerant technology that can
carry signals of different capacities over a fiber-optic network at high speeds. It defines
optical carrier (OC) levels for incrementally increasing data rates, and SONET networks can
be arranged in a variety of physical topologies. |
|
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Term
|
Definition
Communication lines that use one pair of wires for transmitting data and
another pair for receiving data. They use the TDM signaling method, making it possible to
extract any number of channels for a particular purpose. See also time division multiplexing
(TDM). |
|
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Term
| time division multiplexing (TDM) |
|
Definition
A signaling method that allocates a time slot for each
channel, making it possible to transmit multiple streams, or channels, of data on a single
physical medium. |
|
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Term
|
Definition
A logical connection created between two devices in a shared network, with
bandwidth allocated for a specific transmission pathway through the network. |
|
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Term
|
Definition
A packet-switching technology that provides an interface between public packetswitching
networks and their customers; it has the advantage of running effectively over
older copper phone lines. X.25 networks are SVC networks, meaning they create the best
available pathway at the time of transmission. See also switched virtual circuits (SVCs). |
|
|
Term
In which of the following areas does a WAN differ from an internetwork? (Choose all that apply.)
a. WANs use service providers for the network connection
b. WANs can't use transport Network layer protocols
c. WANs use serial communication technologies that can span miles
d. WANs don't use routers |
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Definition
|
|
Term
Which of the following is a device used to make WAN connections? (Choose all that apply.)
a. 10BaseT Hub
b. CSU/DSU
c. Router
d. Ethernet Repeater |
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Definition
|
|
Term
Which of the following best describes a digital signal?
a. A signal that varies over time continually and smoothly
b. A signal whose states vary much like a lamp controlled by a dimmer switch.
c. A channel service unit
d. A series of binary values |
|
Definition
| d. A series of binary values |
|
|
Term
For what purpose is a CSU/DSU used?
a. Modulates a digital signal into an analog signal
b. Creates a digital connection between a LAN device and the WAN link
c. Routes packets from the LAN to the WAN
d. Creates a WAN connection over the public switched telephone network |
|
Definition
| Creates a digital connection between a LAN device and the WAN link |
|
|
Term
Which of the following is a common WAN connection method? (Choose all that apply.)
a. Ciruit switched
b. Packet leased
c. VPN over POTS
d. Packet Switched |
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Definition
|
|
Term
Which of the following is true about ISDN?
a. It uses a modem to modulate/demodulate the signal
b. Its BRI format consists of two B-channels and one D-channel
c. It's PRI format provides bandwidth up to 128Kbps
d. It uses a termianl adapter to connect to the network |
|
Definition
| b. Its BRI format consists of two B-channels and one D-channel |
|
|
Term
Which of the following is a typical situation in which leased lines should be considered? (Choose all that apply.)
a. Occasional Use of the WAN is needed
b. 24/7 access is required
c. Fast upstream and downstream communications are needed
d. You want to pay only for the bandwidth you use |
|
Definition
|
|
Term
Which of the following combines several communication streams into a single faster communication stream?
a. Multiplexing
b. Demultiplexing
c. DSU
d. CSU |
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Definition
|
|
Term
Which physical topology does SONET readily support? (Choose all that apply.)
a. Point-to-point
b. Star
c. Ring
d. Bus |
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Definition
|
|
Term
Which of the following technologies uses packet-switching technologies? (Choose all that apply.)
a. ISDN
b. Frame Relay
c. T1
d. X.25 |
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Definition
|
|
Term
Which of the following technologies provides permanent virtual circuits? (Choose all that apply.)
a. PSTN
b. Frame Relay
c. X.25
d. ISDN |
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Definition
|
|
Term
Which technology uses 53-byte cells?
a. POTS
b. ATM
c. Frame Relay
d. X.25 |
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Definition
|
|
Term
To maintain security, WAN connections over the Internet should use which of the following?
a. BRI
b. LANE
c. OC-3
d. VPN |
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Definition
|
|
Term
What type of device is required to connect to a dedicated digital communication line?
a. modem
b. NIC
c. CSU/DSU
d. LANE |
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Definition
|
|
Term
Which term best describes the place in a WAN connection where the customer's responsibility ends and the provider's responsibility begins?
a. Data circuit terminating equipment
b. Demarcation Point
c. CPE
d. Central Office |
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Definition
|
|
Term
Which of the following places data on the local loop?
a. DCE
b. DTE
c. Router
d. CPE |
|
Definition
|
|
Term
Which of the following is the equipment at the customer site that's the responsibility of the customer?
a. DTE
b. DCE
c. Demarcation Point
d. CPE |
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Definition
|
|
Term
Which of the following is a VPN protocol supported by RRAS? (Choose all that apply.)
Which of the following is a VPN protocol supported by RRAS? (Choose all that apply.)
a. PPTP
b. L2TP
c. HTTP
d. SSTP |
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Definition
|
|
Term
Which of the following is a component of the PPP protocol? (Choose all that apply.)
a. Link Control Protocol
b. NCP
c. VPN
d. RDP |
|
Definition
|
|
Term
Which of the following can best be described as developing applications by using a service provider's development tools and infrastructure?
a. Hosted applications
b. Hosted networking
c. Hosted platforms
d. Hosted infrastructure |
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Definition
|
|
Term
Which wireless WAN technology has a standard for fixed and mobile devices?
a. WiMAX
b. LTE
c. Satellite
d. LTE-Advanced |
|
Definition
|
|
Term
Which wireless WAN technology might not be suitable for voice applications because of latency?
a. WiMAX
b. LTE
c. Satellite
d. LTE-Advanced |
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Definition
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