Correction of errors using an error detecting code requires that block of data to be
________.
A) skipped over
B) deleted
C) retransmitted
D) streamed
Answer:
The term ________ means that all users share a common MAC broadcast address.
A) broad
B) SAN
C) flat
D) storm
Answer:
Two frames interfering with each other at the receiver so that neither gets through is
known as ________.
A) a collision
B) a backlog
C) a backoff
D) scrambling
Answer:
An example of servers are _________ .
A) proxies
B) redirect servers
C) registrars
D) all of the above
Answer:
A technique known as slotted ________ organizes time on the channel into uniform
slots whose size equals the frame transmission time. Transmission is permitted to begin
only at a slot boundary.
A) ALOHA
B) CSMA
C) boundary relay
D) Ethernet
Answer:
RFC 3550 outlines ________ as a function performed by RTCP.
A) QoS and congestion control
B) identification
C) session control
D) all of the above
Answer:
A(n) ________ domain is an Internet e-mail provider.
A) message store
B) administrative management
C) user agent
D) submission agent
Answer:
_______ provide the ARQ mechanism in HDLC when piggybacking is not used.
A) I-frames
B) R-frames
C) U-frames
D) S-frames
Answer:
Each ________ includes a field that holds the sequence number of that frame plus a
field that holds the sequence number used for acknowledgment.
A) SAF
B) window
C) data frame
D) relay frame
Answer:
With ________ it is possible to simultaneously transmit either from or to different users
by allocating the subcarriers during any one-time interval to multiple users.
A) OFDMA
B) SC-FDMA
C) SC-TDMA
D) all of the above
Answer:
The flag field pattern is ________.
A) 01111110
B) 01111010
C) 00111110
D) 01111101
Answer:
As the mobile units move they pass from cell to cell, which requires transferring of the
call from one base transceiver to another. This process is called ________.
A) frequency reuse
B) a handshake
C) equalization
D) a handoff
Answer:
In ________ transmission signals are transmitted in only one direction; one station is
the transmitter and the other is the receiver.
A) half duplex
B) simplex
C) full duplex
D) multipoint
Answer:
Error correction works by adding ________ to the transmitted message.
A) decoding
B) clarification
C) error burst
D) redundancy
Answer:
MPLS is intended to provide connection-oriented QoS with features similar to those
found in ________.
A) Integrated Services
B) IETF
C) Differentiated Services
D) ISA
Answer:
Typically used for long distance applications, ________ propagation provides superior
performance because there is a single transmission path.
A) single-mode
B) direct-line mode
C) step-index multimode
D) graded-index multimode
Answer:
_________ refers to flows that will back off appropriately in the face of congestion.
A) TCP friendly
B) Fast recovery
C) Congestion collapse
D) Backpressure
Answer:
_______ is a section in a DNS message.
A) Header
B) Question
C) Authority
D) All of the above
Answer:
___________ rule demonstrates that both FM and PM require greater bandwidth than
AM.
A) Reed’s
B) Carson’s
C) Chaudhuri’s
D) Solomon’s
Answer:
Which of the following is a drawback associated with adaptive routing?
A) It may react too quickly, causing congestion producing oscillation, or too slowly,
being irrelevant.
B) All nodes that are directly or indirectly connected to the source node are visited.
C) Because all routes are tried, at least one copy of the packet to arrive at the
destination will have used a minimum hop route.
D) Queue is an artificial measure of delay.
Answer:
A loss between the transmitting and receiving antennas caused by water vapor and
oxygen is ________.
A) atmospheric absorption
B) parabolic loss
C) atmospheric interference
D) isotropic loss
Answer:
IGMP _____ enabled a host to request to be unsubscribed from a group.
A) v1
B) v2
C) v3
D) v4
Answer:
The principle disadvantage of VLAN “membership by port group” is that ________.
A) it requires switches to examine portions of the MAC frame above the MAC layer
causing a performance impact
B) VLAN membership must be assigned initially
C) it is relatively easy to configure
D) the network manager must reconfigure VLAN membership when an end system
moves from one port to another
Answer:
In ________ signaling an analog or digital data source is encoded into a digital signal.
A) polar
B) carrier
C) analog
D) digital
Answer:
The simplest approach to interconnecting multiple LANs within an organization is to
use a ________.
A) hub
B) bridge
C) switch
D) gateway
Answer:
With ________ the link costs used in designing routes cannot be based on any dynamic
variable such as traffic.
A) fixed routing
B) random routing
C) adaptive routing
D) flooding
Answer:
Multiple users employing the same transport protocol and distinguished by port
numbers or service access points is ________.
A) multiplexing
B) sequencing
C) flowing
D) full duplex
Answer:
A reduction in strength is ________.
A) delay distortion
B) attenuation
C) pulsing
D) interlacing
Answer:
A communication ________ is a microwave relay station used to link two or more
ground based microwave transmitter/receivers known as earth stations.
A) transmitter
B) transponder
C) dish
D) satellite
Answer:
Each base station is connected to a ________, which serves multiple base stations.
A) mobile telecommunications switching office
B) public telephone network
C) cellular network
D) chain of base stations
Answer:
_________ is an opaque data value chosen by the controller and may be used by the
controller to filter flow statistics, flow modifications, and flow deletion.
A) Counter
B) Match field
C) Cookie
D) Priority
Answer:
With __________ the same data is coded and transmitted through multiple antennas.
A) spatial multiplexing
B) CDMA
C) spatial diversity
D) SC-FDMA
Answer:
A ________ converts digital data to analog signal so that it can be transmitted over an
analog line.
A) modem
B) satellite
C) router
D) receiver
Answer:
An internet consists of multiple separate networks that are interconnected by ________.
Answer:
With ________, a node selects only one outgoing path for retransmission of
an incoming packet. The outgoing link is chosen at random, excluding the link
on which the packet arrived. If all links are equally likely to be chosen, then a node may
simply utilize outgoing links in a round robin fashion.
Answer:
________ codes make highly efficient use of redundancy and block lengths and symbol
sizes can be easily adjusted to accommodate a wide range of message sizes.
Answer:
IPv6 allows three types of addresses: unicast, anycast, and ________.
Answer:
A ________ consists of a set of computers that interconnect by means of a
relatively unsecure network and makes use of encryption and special protocols to
provide security.
Answer:
_________ antenna architecture has become a key technology in evolving high-speed
wireless networks, including IEEE 802.11 Wi-Fi LANs and WiMAX.
Answer:
The two types of MIMO transmission schemes are spatial diversity and __________ .
Answer:
A single orbiting satellite will operate on a number of frequency bands called ________
channels.
Answer:
The earliest medium access control technique is known as ________ and
was developed for packet radio networks.
Answer:
IP addresses are usually written in ________ notation, with a decimal
number representing each of the octets of the 32-bit address.
Answer:
The IEEE 802.11 ________ layer includes infrared and spread spectrum and covers a
range of data rates.
Answer:
SC-FDMA performs a _______ prior to the IFFT operation, which spreads the data
symbols over all the subcarriers carrying information and produces a virtual
single-carrier structure.
Answer:
Currently the most popular type of wireless LAN uses ________ techniques.
Answer:
Since there is no assurance that the flag field pattern will not appear somewhere inside
the frame, a procedure known as ________ is used to prevent
destroying synchronization.
Answer:
Wireless transmission frequencies in the range of about 1 GHz to 40 GHz are referred
to as ________ frequencies. Highly directional beams are possible at these frequencies.
Answer:
A key distinguishing element of packet switching networks is whether the internal
operation is datagram or ________.
Answer:
The jitter measure may provide a warning of increasing congestion before it leads to
packet loss.
Answer:
The ________ algorithm can be stated as follows: “Find the shortest paths from a given
source node subject to the constraint that the paths contain at most one link, then find
the shortest paths with a constraint of paths of at most two links, and so on.”
Answer:
The characteristics that distinguish various data link configurations are topology and
whether the link is half duplex or full duplex.
Answer:
The ________ provides a framework for the development of protocols such as RSVP to
handle multimedia/multicast traffic and provides guidance to router vendors on the
development of efficient techniques for handling a varied load.
Answer: