networking prelim

Question 1

in 1819 proved that a wire carrying an electric current could
deflect a magnetized needle, opening the way for
wire-based telegraph networks. Today, computer
information network reach millions of people in
every part of the globe.

Answer 1

Hans Oersted

Question 2

Three types of networks

Answer 2

Word-of-mouth communication
Telephone
Computer

Question 3

Transmit information to person or group like word-ofmouth and Carry data, voice, and video communications

Answer 3

Computer networks

Question 4

Communication cables and radio waves
* Specialized equipment to connect networks

Answer 4

telephone network communication infrastructure

Question 5

Computer network components

Answer 5

– Computer hardware and software
– Print devices
– Network Devices

Question 6

System components linked using various media

Answer 6

– Copper wire
– Fiber-optic cables
– Radio waves
– Infrared waves
– Microwaves

Question 7

Three types of computer networks

Answer 7

– Local area networks (LANs)
– Metropolitan area networks (MANs)
– Wide area networks (WANs)

Question 8

LAN

Answer 8

local area network

Question 9

WAN

Answer 9

wide area network

Question 10

MAN

Answer 10

metropolitan area network

Question 11

Interconnects computers, printers, other equipment
– Consists of shared hardware and software resources
in close physical proximity

Answer 11

LAN

Question 11

Spans a greater distance than a LAN
* Up to 48 kilometers (about 30 miles)

Answer 11

MAN

Question 12

– Links multiple LANs within city or metropolitan region
* Typically uses fiber-optic/wireless connections

Answer 12

MAN

Question 13

– Composed of two or more LANs or MANs
– Connected across distance greater than 48 km
– May have constituent LANs on different continents

Answer 13

WAN

Question 14

Links different users across one or more organizations
– Provides variety of resources
– Used to fulfill business, research, educational tasks
– Typically consists of several LANs
– example: campus network

Answer 14

Enterprise network

Question 15

what is node?

Answer 15

it is the station

Question 16

Personal computer, server, mainframe, minicomputer, printer, fax, CD-ROM array, disk array
Wire cabling, fiber-optic cables, radio or infrared waves
– Provides transmission of signals to and from what?

Answer 16

Node

Answer 17

Nodes(the station)

Question 18

Three network nodes important to users:

Answer 18

– Workstations
– Hosts
– Servers

Question 19

Single computers offering multiuser access
– Repository for software applications and data files
– Host from two to as many as several thousand users
– Network operating system is key to capability
* Example: Microsoft Windows Server operating system

Answer 19

Server

Question 19

Has CPU (central processing unit) and operating
system
– Home to local applications such as Microsoft Office
Runs network applications to access data on server or
mainframe
– May fulfill roles as client and host

Answer 19

Workstation computer

Question 20

what is NIC ?

Answer 20

network interface card

Question 21

Board installed in computer or network device
– Attached to communication media by connector or
antenna

Answer 21

NIC (network interface card)

Question 22

Driving forces in networking technology

Answer 22

– Interpersonal communication
– Business transactions
– Entertainment products

Question 23

physical layout combined with logical path

Answer 23

Topology

Question 24

pattern of physical layout
– Wired networks: cabling laid in office, building, campus
– Wireless networks: types of antennas, devices,
direction of transmission

Answer 24

Cable plant

Question 25

– Cable between each station on network
– Analogy: mountain climbers connected by a rope

Answer 25

Decentralized network layout

Question 26

Each station physically connected to central device
– Analogy: star with workstation as its points

Answer 26

Centralized network layout

Question 27

Main topologies

Answer 27

bus
ring
star
mesh

Question 28

Hybrid topologies

Answer 28

star-bus
star-ring

Question 29

– Consists of cables connecting PCs or file servers
– Visualizes connections as chain links
– Terminator attached to each end of bus cable segment

Answer 29

• Bus topology

Question 30

IEEE

Answer 30

Institute of Electrical and Electronics Engineers

Question 30

signals end of physical segment
– Functions as resistor that absorbs signal and critical on bus networks
– Prevents signal reflection back on to covered path

Answer 30

Terminator

Question 31

continuous data path
– Workstations attached to cable at points around ring
* Transmitting data across ring topology
– Goes around ring to reach destination
– Continues until ends at source nod

Answer 31

Ring topology

Question 32

multiple nodes attached to central
device (hub, switch, router)
– Cable segments radiate from center like a star
– Example: workstations connected to switch

Answer 32

Star topology

Question 33

– Each radiating finger is separate logical bus segment
– Each segment terminated at both ends

Answer 33

Star-bus

Question 34

Every node connected to every other node in network
– Provides network with fault tolerance
* Fault tolerance: built-in protection against failure
* If link breaks, nodes can still communicate
– Alternate communication paths increase as number of
nodes increase

Answer 34

Mesh topology

Question 35

– Hub or access unit acts as linking device
– Transmission using logical communication of ring
– No need for built-in terminators

Answer 35

Star-ring