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Net Essentials > Extra_1 > Flashcards

Extra_1 Flashcards

1
Q

1st element

A

message source/sender

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2
Q

2nd element

A

destination/receiver

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3
Q

3rd element

A

transmission medium/channel

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4
Q

3 things all communication devices need to have in common

A

method of communication
common language/grammar
acknowledgement requirements

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5
Q

when a new standard is purposed, and each stage is being recorded

A

request for comments (RFC)

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6
Q

publish and manage RFC

A

internet engineering task force (IETF)

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7
Q

shows interaction between different protocols as a layer hierarchy

A

protocol stack

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8
Q

protocol governs the way a web server and client interact. defines content and formatting

A

hypertext transfer protocol

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9
Q

manages individual conversations. responsible for guaranteeing reliable delivery and managing flow control.

A

transmission control protocol (TCP)

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10
Q

responsible for delivering messages between sender and receiver -used by routers

A

internet protocol (IP)

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11
Q

responsible for delivery from one network interface card (NIC) to another network interface card (NIC) on the same network

A

ethernet

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12
Q

responsible for approving and maintaining the standard for connections, media requirements, communication protocol

A

institute of electrical electronic engineers (IEEE)

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13
Q

ethernet standard approved by the IEEE

A

802.3

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14
Q

process of placing a message format (letter) inside another message (envelope)

A

encapsulation

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15
Q

the “envelope” a message is encapsulated in before being sent over the network. provides address of destination and of source host. layer 2-data link layer.

A

frame

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16
Q

PDU

A

protocol data units

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17
Q

max bytes in a frame

A

1518

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18
Q

min bytes in a frame

A

64

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19
Q

FCS

A

frame check sequence

20
Q

SFD

A

start of frame delimiter

21
Q

fcs and sfd are used to calculate what?

A

frame size

22
Q

gives a heads-up to recipient

A

pre-amble

23
Q

changes from hop-to-hop

A

MAC address

24
Q

Logical address, assigned based on where host is located.

A

IP address

25
Q

breaks large networks into smaller more manageable networks. layer approach

A

hierarchical network

26
Q

what are the benefits of a hierarchical network?

A

increased efficiency, optimization of function, increased speeds, organized

27
Q

layer that provides connection to host in local ethernet network

A

access layer

28
Q

layer that interconnects smaller local networks

A

distribution layer

29
Q

layer that provides high-speed connection between distribution layer devices

A

core layer

30
Q

layer that provides first line of networking devices that connects host to wired ethernet network

A

access layer

31
Q

multi-port system used to connect hosts to network. cannot decode messages. regenerates signal to all hosts. shared bandwidth, messages can only be sent one at a time. obsolete.

A

hubs

32
Q

used at the access layer switch decodes frame to read MAC address portion of the message

A

ethernet switches

33
Q

on switch, contains list of active ports and host MAC address

A

MAC address table

34
Q

temporary connection between sources and destination. allow for many conversations to take place at the same time without collisions.

A

circuit

35
Q

if destination MAC address is not in the table, switch does not create individual circuit. how will switch find MAC address?

A

switch will flood message to all attached host- except for sending host

36
Q

How does a switch learn a new MAC address?

A

switch table is dynamically updated, new host can be address and MAC address of new host is immediately learned

37
Q

one host ability to send messages to all other host at the same time. used to find info or to provide info

A

broadcast message

38
Q

what is used to divide network into multiple broadcast domains

A

router

39
Q

what regenerates a signal

A

repeater

40
Q

used by a router to discover MAC address of any host on the same network

A

address resolution protocol (ARP)

41
Q

layer that connects local networks and controls traffic flow between them. make sure local stays local -except traffic going to another network

A

distribution layer

42
Q

layer that interconnects host

A

access layer

43
Q

layer that interconnects networks

A

distribution layer

44
Q

limit broadcast to the local network to many host trying to broadcast can slow down network

A

broadcast containment

45
Q

can separate/protect certain groups of computers where confidential info. can also hide addresses of internal host form outside attacks, controls in and outgoing traffic

A

security

46
Q

networking device that connects multiple layer 3 IP network
can direct traffic
ability to decode and read messages
finds best and fastest routes

A

router

Net Essentials (5 decks)

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