Examen 2 P1

Question 1

Protocol layering, packet switching, routing and data streaming are the principles on which.

Answer 1

computer networks are based

Question 2

The computers and other devices that use the network for communication purposes are referred to as

Answer 2

Host

Question 3

This is the delay that occurs after a send operation is executed before data starts to arrive at the
destination computer in network performance.

Answer 3

Latency

Question 4

This term is used to refer to any computer or switching device attached to a network

Answer 4

Node

Question 5

This is the speed at which data can be transferred between two computersin the network once
transmission has begun.

Answer 5

Data Transfer Rate

Question 6

This is a single communication subsystem providing communication between all of the hosts that are
connected to it, where the internet is constructed from many subnets.

Answer 6

The internet

Question 7

They carry messages at lower speeds between nodes that are often in different organizations and may
be separated by large distances.

Answer 7

WANs

Question 8

The end-to-end communication must provide totally error-free, the detection of communication
errors and their correction is that we call:

Answer 8

Reliability

Question 9

This is a sequence of binary data (an array of bits or bytes) of restricted length, together with
addressing information sufficient to identify the source and destination computers.

Answer 9

simplest form of package

Question 10

This is a unit of routing (delivering data from one part of the Internet to another)

Answer 10

Subnet

Question 11

This type of network is based on the high bandwidth copper and fiber optic cabling recently
installed in some towns and cities for the transmission of video, voice and other data over
distances of up to 50 kilometers

Answer 11

MANs

Question 12

This is defined as the ability to meet deadlines when transmitting and processing streams of real
time multimedia data

Answer 12

Quality of service

Question 13

This is a communication subsystem in which several networks are linked together to provide common
data communication facilities that overlay the technologies and protocols of the individual component
networks and the methods used for their interconnection.

Answer 13

Internetwork

Question 14

This is why many network technologies support the simultaneous transmission of messages to
several recipients.

Answer 14

Multicasting

Question 15

The IEEE 802.16 WIMAX standard is targeted at this class of network. It aims to provide an
alternative to wired connections to home and office buildings

Answer 15

Wireless metropolitan area networks (WMANs)

Question 16

This is referred to as the transmission and display of audio and video in real time. It requires much
higher bandwidths than most other forms of communication in distributed systems.

Answer 16

Streaming

Question 17

They are composed of a number of personal devices such as mobile phones, tablets, digital cameras,
music players and so on that are now carried by many people

Answer 17

Wireless personal area networks (WPANs)

Question 18

They are generally used to hold the video frames, but because the flow is continuous as opposed to the
intermittent traffic generated by typical client-server interactions and are handled somewhat differently

Answer 18

UDP internet packets

Question 19

In this type of network, most mobile phone networks are based on digital wireless network technologies
such as the GSM standards, which is used in most countries of the world.

Answer 19

Wireless wide area networks (WWANs)

Question 20

They are specifically designed to provide high bandwidth and low latencies and to support quality of
service by the reservation of network resources.

Answer 20

ATM networks

Question 21

This is a transmission technique that involves no switching, everything is transmitted to every node, and
it is up to potential receivers to notice transmissions addressed to them.

Answer 21

Broadcast

Question 22

In this type of switching, each packet arriving at a node is first stored in memory at the node and then
processed by a program that transmits it on an outgoing circuit, which transfers the packet to another
node that is closer to its ultimate destination.

Answer 22

Packet Switching

Question 23

Their operation was simple to understand, when a caller dialed a number, the pair of wires from her
phone to the local exchange was connected by an automatic switch at the exchange to the pair of wires
connected to the other party´s phone

Answer 23

Circuit Switching

Question 24

This is used to refer to a well-known set of rules and formats to be used for communication between
processes in order to perform a given task.

Answer 24

The term protocol

Question 25

The task of dividing messages into packets before transmission and reassembling them at the receiving
computer is usually performed in the transport layer.

Answer 25

Packet assembly

Question 26

They are software-defined destination points at a host computer. They are attached to processes,
enabling data transmission to be addressed to a specific process at a destination node.

Answer 26

Ports

Question 27

This is a numeric identifier that uniquely identifies a host computer and enables it to be located by
nodes that are responsible for routing data to it.

Answer 27

A network address

Question 28

When a pair of nodes connected to two separate networks need to communicate through another type
of network or over an alien protocol, they can do so by constructing a protocol inder a scheme of:

Answer 28

Tunneling

Question 29

This is a function that is required in all networks except those LANs, such as the Ethernet, that provide
direct connections between all pairs of attached hosts.

Answer 29

Routing

Question 30

A unified addressing scheme between different networks that enables packets to be addressed
themselves cannot contain very much of the information needed to route a packet to its destination.

Answer 30

An internetwork

Question 31

This must lend itself to the development of a flexible and efficient routing scheme, but the addresses
themselves cannot contain very much of the information needed to route a packet to its destination.

Answer 31

The addressing scheme

Question 32

The determination of routes for the transmission of packets to their destinations is the responsibility of
this procedure, which has two parts:

Answer 32

a routing algorithm

Question 33

It is based upon the permanent allocation of a normal IP address to each mobile host on a subnet in its
home domain.

Answer 33

Mobile IP

Question 34

The purpose of this is to monitor and control all communication into and out of an intranet.

Answer 34

Firewall