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Broadband cable requires many subscribers to share the same local line, thus raising concerns about __ and actual (versus theoretical) throughput.


Because WAN connections require routers or other Layer 3 devices to connect locations, their links are not capable of carrying __ protocols.


ISDN PRI uses __ B channels and one 64-Kbps D channel.


__ is the preferred communications protocol for remote access communications.

OC (optical carrier) level

The data rate of a particular SONET ring is indicated by its __, a rating that is internationally recognized by networking professionals and standards organizations.

WAN sites

The individual geographic locations connected by a WAN are known as __.


Dial-up ISDN does not convert a computer's digital signals to analog before transmitting them over the PSTN.


ATM is a WAN technology that functions in the Data Link layer.

Remote desktop

__ is the remote virtual computing software that comes with Windows client and server operating systems.


SONET specifies framing and multiplexing techniques at the Physical layer.


In a process called __, two 64-Kbps ISDN B channels can be combined to achieve an effective throughput of 128 Kbps.


A(n) __ uses TDM (time division multiplexing) over two wire to divide a single channel into multiple channels.

Fault tolerance

SONET's extraordinary __ results from its use of a double-ring topology over fiber-optic cable.

Fixed packet

Wat sets ATM apart from Ethernet is its __ size.


A __ aggregates multiple DSL subscriber lines and connects them to the carrier's CO.

Smart jack

At the customer's demarcation point, either inside or outside the building, T-carrier wire pairs terminate with a __.


On most modern WANs, a ring topology relies on __ rings to carry data.

Virtual circuits

__ are connections between network nodes that, although based on potentially disparate physical links, logically appear to be direct, dedicated links between those nodes.

Virtual network computing

__ is an open source system designed to allow one workstation to remotely manipulate and receive screen updates from another workstation.

Local loop

the portion of the PSTN that connects any residence or business to the nearest CO is known as the __.


The speed of a T-carrier depends on its __ level.


A PSTN offers __ security.


In a star topology, a single connection failure will halt all traffic between all sites.

False (Microsoft)

The PPTP VPN tunneling protocol is based on technology developed by CISCO.

Frame delay

__ is an updated, digital version of X.25 that also relies on packet switching.


__ is the standard for connecting home computers to an ISP via DSL or broadband cable.


WANs typically send data over __ available communications networks.


__ virtual computing allows a user on one computer, called the client, to control another computer, called the host or server, across a network connection.

Dial up

__ networking refers to dialing directly into a private network's or ISP's remote access server to log on to a network.

Terminator adapter

A __ converts digital signals into analog signals for use with ISDN phones and other analog devices.

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