Lecture 1

Question 1

What is the internet

Answer 1

A collection of networks

Question 2

What kind of connected devices can be in a network?

Answer 2

workstations, laptops, tablets, routers, switches, etc

Question 3

Communication can be defined as sending and ________ messages

Answer 3

receiving

Question 4

What is a protocol?

Answer 4

A method to define communication

Question 5

A network ____ sends or receives data

Answer 5

end

Question 6

A network core is what data gets ____ through

Answer 6

sent

Question 7

An example of a network edge is a _______

Answer 7

printer

Question 8

A switch is an example of a network _____

Answer 8

core

Question 9

An end system is just a system of network ____

Answer 9

ends

Question 10

Guided media are _______ links such as copper wire and optical fibre

Answer 10

physical

Question 11

__________ media are links through the air

Answer 11

unguided

Question 12

___________ between end systems is a service that the internet provides

Answer 12

Communication

Question 13

2 methods to transmit information is via _____ and data

Answer 13

voice

Question 14

You can transmit voice information by …

Answer 14

person, telephone, internet, recordings, or through wireless methods

Question 15

You can transmit data information by …

Answer 15

paper, disk, tape, vocally, digitally, or wirelessly

Question 16

A source system includes the data _____ and ____________ device

Answer 16

source, transmitting

Question 17

The transmitting device ______ data into electromagnetic signals

Answer 17

encodes

Question 18

The destination system includes a receiver that…

Answer 18

intercepts the transmitted EM signals from the transmission system.

Question 19

What are the 5 steps taken to transmit information?

Answer 19

1. Feed info to source system
2. Encode info into send-able form
3. Info travels through a medium to destination system
4. Destination system decodes info
5. Decoded signal must be translated into a form that is understandable

Question 20

A problem of point to point connections is that the source and destination may be separated by ______ distances

Answer 20

large

Question 21

A problem of point to point connections is that ____ may be needed for only a short time

Answer 21

links

Question 22

A problem of point to point connections is that there are too many devices that can be the ______ or __________ at any given time

Answer 22

source, destination

Question 23

A problem of point to point connections is that the _______ may be crowded by multiple pairs of sources and destinations

Answer 23

medium

Question 24

The problems of point-to-point connections are addressed using networking _______

Answer 24

protocols

Question 25

A protocol is a ...

Answer 25

method to define communication

Question 26

In a ______, all devices communicate via a net of connections

Answer 26

network

Question 27

If we have a large number of devices, ________ connections are not viable, and we opt to use a ______

Answer 27

dedicated, network

Question 28

Using a network also ensures that our signal does not _______ when going large distances

Answer 28

corrupt

Question 29

_______ connections are required if you want a direct connection between all workstations

Answer 29

n(n-1)/2

Question 30

Workstations connected by one BUS lacks __________, allows only one ________ at a time, and loses signal integrity as it travels farther

Answer 30

robustness, message

Question 31

Workstations connected in a tree structure _________ robustness, but route too much ______ through the root

Answer 31

increases, traffic

Question 32

A ___ is a network that covers a large geographical area

Answer 32

WAN

Question 33

A partially connected network provides lots of ________ and can have other workstations act as ____ for data

Answer 33

redundancy, relays

Question 34

A problem that a partially connected network introduces packet ___________

Answer 34

mis-timing (Packets arrive to the destination out of order)

Question 35

A LAN connects devices in a _____ area

Answer 35

small

Question 36

________ switching: making a connection along a particular path and sending all data in the message through that path

Answer 36

Circuit

Question 37

Packet switching: ...

Answer 37

break the message into pieces and send each piece separately along its own path

Question 38

Virtual circuit switching: break the message into pieces and use software to simulate a connection in a _______ switched network.

Answer 38

packet

Question 39

When packet switching, packets sent in the order A-B-C might arrive at the destination ....... Why?

Answer 39

our of order. The packets each take different paths that take different amount of times

Question 40

What are the 3 functions of a store and forward node?

Answer 40

- Receive and store incoming packets - Check incoming packets for data corruption - Forward the valid packets to the next node

Question 41

If the queue of a store and forward node is full, all incoming packets are ______

Answer 41

dropped