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CMPT 371 > Lecture 1 > Flashcards

Lecture 1 Flashcards

1
Q

What is the internet

A

A collection of networks

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2
Q

What kind of connected devices can be in a network?

A

workstations, laptops, tablets, routers, switches, etc

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3
Q

Communication can be defined as sending and ________ messages

A

receiving

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4
Q

What is a protocol?

A

A method to define communication

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5
Q

A network ____ sends or receives data

A

end

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6
Q

A network core is what data gets ____ through

A

sent

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7
Q

An example of a network edge is a _______

A

printer

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8
Q

A switch is an example of a network _____

A

core

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9
Q

An end system is just a system of network ____

A

ends

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10
Q

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

A

physical

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11
Q

__________ media are links through the air

A

unguided

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12
Q

___________ between end systems is a service that the internet provides

A

Communication

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13
Q

2 methods to transmit information is via _____ and data

A

voice

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14
Q

You can transmit voice information by …

A

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

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15
Q

You can transmit data information by …

A

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

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16
Q

A source system includes the data _____ and ____________ device

A

source, transmitting

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17
Q

The transmitting device ______ data into electromagnetic signals

A

encodes

18
Q

The destination system includes a receiver that…

A

intercepts the transmitted EM signals from the transmission system.

19
Q

What are the 5 steps taken to transmit information?

A
  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
20
Q

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

A

large

21
Q

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

A

links

22
Q

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

A

source, destination

23
Q

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

A

medium

24
Q

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

A

protocols

25
Q

A protocol is a …

A

method to define communication

26
Q

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

A

network

27
Q

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

A

dedicated, network

28
Q

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

A

corrupt

29
Q

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

A

n(n-1)/2

30
Q

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

A

robustness, message

31
Q

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

A

increases, traffic

32
Q

A ___ is a network that covers a large geographical area

A

WAN

33
Q

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

A

redundancy, relays

34
Q

A problem that a partially connected network introduces packet ___________

A

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

35
Q

A LAN connects devices in a _____ area

A

small

36
Q

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

A

Circuit

37
Q

Packet switching: …

A

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

38
Q

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

A

packet

39
Q

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

A

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

40
Q

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

A
  • Receive and store incoming packets
  • Check incoming packets for data corruption
  • Forward the valid packets to the next node
41
Q

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

A

dropped

CMPT 371 (9 decks)

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