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20 terms

Network+ Guide to Networks - Chapter 7

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publicly
WANs typically send data over ____ available communications networks.
WAN sites
The individual geographic locations connected by a WAN are known as ____.
nonroutable
Because WAN connections require routers or other Layer 3 devices to connect locations, their links are not capable of carrying ____ protocols.
redundant
On most modern WANs, a ring topology relies on ____ rings to carry data.
local loop
The portion of the PSTN that connects any residence or business to the nearest CO is known as the ____.
marginal
A PSTN offers ____ security.
frame relay
____ is an updated, digital version of X.25 that also relies on packet switching.
bonding
In a process called ____, two 64-Kbps ISDN B channels can be combined to achieve an effective throughput of 128 Kbps.
terminal adapter
A ____ converts digital signals into analog signals for use with ISDN phones and other analog devices.
23
ISDN PRI uses ____ B channels and one 64-Kbps D channel.
signal
The speed of a T-carrier depends on its ____ level.
smart jack
At the customer's demarcation point, either inside or outside the building, T-carrier wire pairs terminate with a ____.
DSLAM
A ____ aggregates multiple DSL subscriber lines and connects them to the carrier's CO.
security
Broadband cable requires many subscribers to share the same local line, thus raising concerns about ____ and actual (versus theoretical) throughput.
fixed packet
What sets ATM apart from Ethernet is its ____ size.
fault tolerance
SONET's extraordinary ____ results from its use of a double-ring topology over fiber-optic cable.
OC 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.
Dial-up
____ networking refers to dialing directly into a private network's or ISP's remote access server to log on to a network.
PPP
____ is the preferred communications protocol for remote access communications.
PPPoE
____ is the standard for connecting home computers to an ISP via DSL or broadband cable.