Computer Networks II

Question 1

measurement of the width or capacity of the communication channel

Answer 1

bandwidth

Question 2

it means how much information can move across the communication channel in a given amount of time

Answer 2

bandwidth

Question 3

4 categories of bandwidth

Answer 3

voiceband,
medium band,
broadband,
baseband

Question 4

also known as low bandwidth that is used for standard telephone communication

Answer 4

voiceband

Question 5

effective for transmitting text documents but not for high-quality audio and video

Answer 5

voiceband

Question 6

used in special leased lines to connect midrange computers and mainframes as well as to transmit data over long distances and is capable of very high-speed data transfer

Answer 6

medium band

Question 7

widely used for DSL, cable, and satellite connections to the internet

Answer 7

broadband

Question 8

widely used to connect individual computers that are located to one another

Answer 8

baseband

Question 9

this bandwidth can only carry single signal at a time

Answer 9

baseband

Question 10

rules for the exchange of information

Answer 10

protocols

Question 11

unique numeric address

Answer 11

IP address (internet protocol address)

Question 12

converts text-based addresses to IP addresses

Answer 12

domain name server (DNS)

Question 13

before the message is sent, it is reformatted or broken down into small parts called “”

Answer 13

packets

Question 14

connects two or more computers so that they can exchange information and share resources

Answer 14

networks

Question 15

any device that is connected to a network

Answer 15

node

Question 16

a node that requests and uses resources available from other nodes

Answer 16

clients

Question 17

a node that shares resources with other nodes

Answer 17

server

Question 18

5 types of server

Answer 18

1. application server
2. database server
3. file server
4. printer server
5. web server

Question 19

specialized server that manages the resources, such as user accounts, for an entire network

Answer 19

directory server

Question 20

any computer system connected to a network that provide access to its resources

Answer 20

host

Question 21

a node that forwards or routes data packets from one network to their destination in another network

Answer 21

router

Question 22

central node that coordinates the flow of data by sending messages directly between sender and receiver nodes

Answer 22

switch

Question 23

expansion cards located within the system unit that connect the computer to a network

Answer 23

network interface cards (NIC)

Question 24

sometimes referred to as LAN adapter

Answer 24

network interface cards (NIC)

Question 25

control and coordinate the activities of all computers and other devices on a network

Answer 25

network operating system (NOS)

Question 26

a computer specialist responsible for efficient network operations and implementation of new networks

Answer 26

network administrator

Question 27

network with nodes that are in close physical proximity

Answer 27

local area networks (LAN)

Question 28

LAN that are being used by individuals in their homes and apartments

Answer 28

home networks

Question 29

this network allows different computers to share resources, including a common Internet connection

Answer 29

home networks

Question 30

it uses radio frequencies to connect computers and other devices

Answer 30

wireless LAN

Question 31

or base station, interprets incoming radio frequencies and routes communications to the approprate devices (a.k.a. hotspots)

Answer 31

wireless access point

Question 32

internal devices which is used to connect to hotspots

Answer 32

wireless network card

Question 33

external device used to connect to hotspots

Answer 33

wireless adapter

Question 34

a type of network that works within a very small area- your immediate surroundings

Answer 34

personal area network (PAN)

Question 35

these networks are frequently used as links between office buildings that are located throughout a city

Answer 35

metropolitan area networks (MAN)

Question 36

this network span distances up to 100 miles

Answer 36

metropolitan area networks (MAN)

Question 37

countrywide and worldwide networks

Answer 37

wide area networks (WAN)

Question 38

widest of all WANs which spans the entire globe

Answer 38

internet

Question 39

use microwave relays and satellites to reach users over long distances

Answer 39

wide area networks

Question 40

describes how a network is arranged and how resources are coordinated and shared

Answer 40

network architecture

Question 41

arrangement or configuration of network

Answer 41

topologies

Question 42

5 most common topologies are

Answer 42

``` bus network ring network star network tree network mesh network ```

Question 43

each device is connected to a common cable called a bus or backbone and all communications travel along this bus

Answer 43

bus network

Question 44

each device is connected to two other devices forming a ring

Answer 44

ring network

Question 45

each devices is conneceted to a central node, either directly or through one or more other devices

Answer 45

tree network

Question 46

also known as hierarchial network

Answer 46

tree network

Question 47

this topology is the newest type type that each node have more than one connection to the other nodes

Answer 47

mesh network

Question 48

two strategies of sharing information and resources

Answer 48

client/server or peer-to-peer

Question 49

uses central servers to coordinate and supply services to other nodes on the network

Answer 49

client/server network

Question 50

nodes have equal authority and can act as both clients and servers

Answer 50

peer-to-peer (P2P) network

Question 51

a private network within an organization that resembles the internet, use browsers, websites, and web pages

Answer 51

intranet

Question 52

a private network that connects more than one organization

Answer 52

extranet

Question 53

securing large computer networks

Answer 53

network security

Question 54

network security includes

Answer 54

firewalls, intrusion detection system, virtual private networks

Question 55

consists of hardware and software that control access to a comoany's intranet and other internal networks

Answer 55

firewall

Question 56

software used to filter a message or file to pass into an organization's network

Answer 56

proxy server

Question 57

work with firewalls to protect an organization's network where it recognizes signs of network attack and disable access before an intruder can do damage

Answer 57

intrusion detection system (IDS)

Question 58

create a secure private connection between a remote user and an organization's internal network

Answer 58

Virtual Private Networks (VPN)