A widely used first-generation system was the ______________, which was
widely used in North and South America, Australia, and China through the 1980s
and into the 2000s.
A _________ is an on-premise telephone switch, owned or leased by an organization
that interconnects the telephones at that location and provides outside access to the
public telephone systems and other voice services.
___________ have the following characteristics:
” Circular orbit at an altitude in the range of 5000″12,000 km.
” The orbit period is about 6 hours.
” The diameter of coverage is from 10,000 to 15,000 km.
” Round-trip signal propagation delay is less than 50 ms.
” The maximum time that the satellite is visible from a fixed point on earth
(above the radio horizon) is a few hours.
With __________, the waves are guided along a solid medium, such as copper twisted
pair, copper coaxial cable, or optical fiber.
Wireless communications is likely to be viewed as an essential part of an enterprise
network infrastructure when:
A. Mobile communication is needed
B. Communication must take place in a hostile or difficult terrain that makes wired
communication difficult or impossible
C. Communication facilities must be installed at low initial cost
D. The same information must be broadcast to many locations
A transmission from an earth station to the satellite is referred to as __________.
In October of 2011, a number of companies and industry groups formed
the __________, whose objective is to promote high-speed optical wireless systems.
Each mobile telecommunications switch office is connected to one base station and
provides a management interface between that base station and the rest of the network.
________ is a page-description language that is built into many desktop printers and
virtually all high-end printing systems.
In a 3-tier client-server implementation, the client is typically a “thin client”.
Hosts connected to the Internet are identified by a unique 24-bit number that identifies a
network and specific host within that network.
Typically cloud computing services will be rented from an external company that hosts
and manages them.
Twisted pair comes in two varieties: unshielded and _________.
Sharing capacity with other communication devices is multiplexing.
With __________ binding, a connection that is set up for an RPC is sustained after the
procedure return.
Typically, crosstalk does not have a debilitating effect on signal quality.
The combination of data from the next higher layer and control information is known as
a __________.
In circuit switching networks, channel capacity between each pair of stations and/or
nodes along the connection path must be reserved regardless if used or not.