The counterpart of fragmentation is reassembly.
Answer:
The greater the bandwidth of the signal the greater its information carrying capacity.
Answer:
The most prominent specification for wireless LANs was developed by the IEEE 802.3
working group.
Answer:
Amplitude shift keying is less susceptible to error than binary frequency shift keying.
Answer:
If the rate at which packets arrive and queue up exceeds the rate at which packets can
be transmitted, the queue size grows without
bound and the delay experienced by a packet goes to infinity.
Answer:
When a router’s buffer overflows it discards packets.
Answer:
Traffic on a network or internet can be divided into two broad categories: elastic and
inelastic.
Answer:
Attenuation is significantly lower for optical fiber than for coaxial cable or twisted pair
and is constant over a wide range.
Answer:
With circuit switching, switching and transmission resources within the network are
reserved for the exclusive use of the circuit for the duration of the connection.
Answer:
Guided media employ an antenna for transmitting through air, vacuum, or water.
Answer:
The biphase codes are known as self-clocking codes.
Answer:
The receiver needs to adopt some policy concerning the amount of data it permits the
sender to transmit.
Answer:
Distributed data communications can be said to involve three agents: applications,
computers, and networks.
Answer:
The Payload Type field identifies the media type of the payload and the format of the
data, including the use of compression or encryption.
Answer:
Local Area Networks are usually owned by the organization that is using the network to
interconnect equipment.
Answer:
A variety of signal encoding techniques are used in the various LAN standards to
achieve efficiency and to make the high data rates practical.
Answer:
Guided media, also called wireless, provide a physical means for guiding
electromagnetic waves through seawater.
Answer:
DSBSC filters out the carrier frequency and sends both sidebands but does not use as
much power and bandwidth as DSBTC.
Answer:
Unicast addressing is where the destination address in the MAC frame designates a
unique destination.
Answer:
SMTP is limited to the conversation that takes place between the SMTP sender and the
SMTP receiver.
Answer:
One of the easiest design aspects of switched data networks is routing.
Answer:
The receiver must be able to distinguish control information from the data being
transmitted.
Answer:
Interoperability is required among the MTA components along the transfer path through
the MHS.
Answer:
An individual cable modem subscriber may experience access speeds from 500 kbps to
1.5 Mbps or more, depending on the network architecture and traffic load.
Answer:
In IPv6 fragmentation may only be performed by routers along a packet’s delivery path.
Answer:
An internetwork using IP is an example of a reliable network service.
Answer:
Each station attaches to the network at a repeater in the star topology and can transmit
data onto the network through the repeater.
Answer:
Analog signals suffer more from attenuation than do digital signals.
Answer:
MPLS delivers the quality of service required to support real-time voice and video but
does not deliver SLAs that guarantee bandwidth.
Answer:
The use of Manchester encoding is a form of synchronization.
Answer:
IGMP takes advantage of the broadcast nature of a LAN to provide an efficient
technique for the exchange of information among multiple hosts and routers.
Answer:
Error correction works by adding sufficient redundancy to the transmitted message.
Answer:
It is necessary to impose a layer of control in each communicating device that provides
functions such as flow control, error detection, and error control.
Answer:
A Class C network is defined as few networks, each with many hosts.
Answer:
The driving force behind the development of IP was the need for more addresses.
Answer:
IEEE 802.11 defines three services that provide a wireless LAN with secure access and
privacy services: authentication, privacy, and ________.
A) deauthentication
B) protected access
C) AP association
D) private access
Answer:
The ________ is a set of one or more interconnected BSSs and integrated LANs that
appear as a single BSS to the LLC layer at any station associated with one of these
BSSs.
A) DS
B) AP
C) MPDU
D) ESS
Answer:
A flowspec contains the following elements: service class, Rspec and ______.
A) Bspec
B) Tspec
C) Dspec
D) Sspec
Answer:
_______ are server programs that hold information about a portion of the domain name
tree structure and the associated RRs.
A) MIME
B) Name servers
C) DNS databases
D) Domain name space
Answer:
________ takes into account the amount of traffic through each queue and gives busier
queues more capacity without completely shutting out less busy queues.
A) RSVP
B) WFQ
C) FIFO
D) SFQ
Answer:
There is a transition at the middle of each bit period in the ________ biphase coding
technique. The midbit transition serves as a clocking mechanism and also as data. A
low-to-high transition represents a 1, and a high-to-low transition represents a 0.
Answer:
“Given a network of nodes connected by bidirectional links, where each link has a cost
associated with it in each direction, define the cost of a
path between two nodes as the sum of the costs of the links traversed. For each pair of
nodes, find a path with the lowest cost” is a description
of ________.
A) least cost routing
B) random routing
C) fixed routing
D) alternate routing
Answer:
Using ________, a sender retransmits a segment before timeout because it infers that
the segment was lost. If the sender subsequently receives an acknowledgement that
does not cover all of the segments transmitted before this is initiated, the sender may
infer that two segments were lost from the current window and retransmit an additional
segment.
A) fast retransmit
B) backoff
C) outward data dissemination
D) Karn’s Algorithm
Answer:
________ provides a basic electronic mail transport facility.
A) TELNET
B) SNMP
C) UDP
D) SMTP
Answer:
A _________ is an RTP relay that receives streams of RTPpackets from one or more
sources, combines these streams, and forwards a new RTP packet stream to one or more
destinations.
A) translator
B) mixer
C) location service
D) registrar
Answer:
________ can be applied to transmissions that carry analog information or digital
information and is used to combat intersymbol interference.
A) Forward error correction
B) Diffraction
C) Adaptive equalization
D) Frequency diversity
Answer:
A common encoding technique in which each of the two modulated streams is a BPSK
signal at half the data rate of the original bit stream is ________. The combined signals
have a symbol rate that is half the input bit rate.
A) MPSK
B) MFSK
C) QPSK
D) QAM
Answer:
One of the most widely used models to develop guidelines for cell size was developed
by ________.
A) Bellman-Ford
B) Jacobson
C) Dijkstra
D) Okumura/Hata
Answer:
When using optical fiber, the term ________ refers to the change in direction of light
rays after they strike small particles or impurities in the medium.
A) relay
B) scattering
C) parabola
D) directrix
Answer:
The ________ is a simple device that produces one or more outgoing RTP packets for
each incoming RTP packet.
A) register
B) translator
C) mixer
D) relay
Answer:
A resource within a SIP network is identified by a __________ .
A) UAS
B) URI
C) UAC
D) URL
Answer:
Computer games, multiplayer network games, infotainment, and interactive audio
visual productions are examples of applications in the _________ domain of
multimedia systems.
A) information management
B) information publishing
C) telecommunication
D) entertainment
Answer:
ADSL uses ________ multiplexing to exploit the capacity of twisted pair.
A) synchronous time division
B) statistical time division
C) time division
D) frequency division
Answer:
________ refers to the fact that traffic routing is determined by labels, and is exercised
below normal IP routing and filtering.
A) Label routing
B) Differentiated Services
C) Traffic engineering
D) Tunnel
Answer:
Subchannels are further grouped into ________, which can be allocated to wireless
users.
A) links
B) chips
C) signals
D) bursts
Answer:
________ is a measure used in the implementation of TCP congestion control measures.
A) Fast recovery
B) Slow start
C) Exponential RTO backoff
D) All of the above
Answer:
A common technique for predicting the next value on the basis of a time series of past
values, and the one specified in RFC 793, is _________.
A) Jacobson’s algorithm
B) token bucket
C) exponential averaging
D) implicit congestion signaling
Answer:
RFC 2205 defines ________ which supplies supporting functionality for ISA.
A) RSVP
B) ISA
C) GSA
D) WFQ
Answer:
A dominant architecture in the business environment and the more recent Web-focused
intranet trend is ________ computing.
A) Ethernet
B) GUI
C) token ring
D) client/server
Answer:
The basic building block of the logical switch architecture is the ________.
A) cookie
B) flow table
C) action set
D) all of the above
Answer:
Ethernet now encompasses data rates of ________.
A) 10 Mbps, 100 Mbps, 1000 Mbps, and 10 Gbps
B) 10 Mbps, 100 Mpbs, 1 Gbps, and 10 Gbps
C) 1 Gpbs, 10 Gbps, 100 Gbps, and 1000 Gbps
D) 100 Mpbs, 1 Gbps, 10 Gbps, and 100 Gbps
Answer:
Once the Passive Open command is issued, the transport entity creates a connection
object of some sort that is in the ________ state.
A) OPEN
B) LISTEN
C) CLOSED
D) FIN
Answer:
One header must serve to perform all protocol mechanisms. This header has a minimum
length of ________ octets.
A) 20
B) 16
C) 8
D) 10
Answer:
“Abort connection when no segments are received” is the ________ Transport Protocol
Timer.
A) 2MSL
B) Keepalive
C) Retransmission
D) Persist
Answer:
An analog signal can be transmitted only a limited distance before attenuation, noise,
and other impairments endanger the integrity
of the data.
Answer:
Optical fiber transmits a signal encoded beam of light by means of ________. This can
occur in any transparent medium that has a higher index of refraction than the
surrounding medium.
Answer:
Recent offerings of ________ multiplexing enable capacities of many terabits
per second for long-distance telecommunication and data network links.
Answer:
The tree layout begins at a point known as the ________.
Answer:
ARPANET is a packet switching network that was the foundation of the present day
Internet.
Answer:
The ___________ Protocol describes the content of sessions, including telephony,
Internet radio, and multimedia applications.
Answer:
________ networks provide advantages in the areas of mobility and ease of installation
and configuration.
Answer:
In an __________ , there is a cluster of bits in which a number of errors occur, although
not necessarily all of the bits in the cluster suffer an error.
Answer:
MIMO systems are characterized by the number of antennas at each end of the wireless
channel.
Answer:
________ is the process of squeezing the data down so that a lower capacity, cheaper
transmission facility can be used to meet a given demand.
Answer:
The disadvantage of using echo cancellation is the need for ________ logic on
both ends of the line.
Answer:
________ access provides a wireless link between a LAN hub and a mobile
data terminal equipped with an antenna, such as a laptop computer or
notepad computer.
Answer:
The standard network management protocol for TCP/IP networks is ________.
Answer:
The ________ protocol provides an end-to-end transfer service that shields upper- layer
protocols from the details of the intervening network or networks.
Answer:
A _______ is a control packet generated at a congested node and transmitted back to a
source node to restrict traffic flow.
Answer:
Four elements comprise the DNS: domain name space, DNS database, name servers,
and _________ .
Answer:
A _________ is any network element that sends SIP requests and receives SIP
responses.
Answer:
The components that work together to implement MPLS-TE are:
information distribution, path calculation, path setup and ________.
Answer:
Twisted pair, coaxial cable and optical fiber are examples of ________ media, which
provide a physical path along which signals are propagated.
Answer:
In the ________ strategy, the source system knows the location of each member of the
multicast group so the source need only send packets to those networks that contain
members of the group.
Answer: