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Home > Archive > alt.certification.network-plus > August 2002 > Nics
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| yappledapple 2002-08-21, 9:28 am |
| I have a book that says nics are layer 2 and a book that says they are layer
1...Which is correct
| |
| Michael Boerigter 2002-08-21, 9:28 am |
| A NIC is a Physical Layer (Layer 1) device since it they take care of many
of the physical aspects of network data. Some other Layer 1 devices are
transceivers, repeaters, hubs and MAUs.
MIke
"yappledapple" <dafamily05@charter.net> wrote in message
news:um7612finhj98a@corp.supernews.com...
> I have a book that says nics are layer 2 and a book that says they are
layer
> 1...Which is correct
>
>
>
| |
| Brian Schwarz 2002-08-21, 12:28 pm |
| You can make a valid argument the NIC really functions at both the Physical
and the Data Link layer. After all, NICs have hard-wired MAC addresses, and
MAC addresses are definitely operate of the Data Link layer. For an
Ethernet NIC, the Physical Layer function includes everything that converts
electricity (or light if you're using Ethernet over fiber) into a pattern of
ones and zeros, and the Data Link function includes all of the Ethernet
specific functions (CSMA/CD, MAC addresses, Ethernet frames, etc.)
Remember that the OSI model is just a model - an attempt to describe the
"real world." The real world, unfortunately, doesn't always fit neatly into
the categories we devise.
Best wishes,
Brian Schwarz
www.bluecollartech.com
--
____________________________
The opinions expressed here are my
own, and do not reflect those of my
employers - past, present, or future.
____________________________
"Michael Boerigter" <boerrigt@prodigy.net> wrote in message
news:VUM89.2580$1_6.295986335@newssvr16.news.prodigy.com...
> A NIC is a Physical Layer (Layer 1) device since it they take care of many
> of the physical aspects of network data. Some other Layer 1 devices are
> transceivers, repeaters, hubs and MAUs.
>
> MIke
>
> "yappledapple" <dafamily05@charter.net> wrote in message
> news:um7612finhj98a@corp.supernews.com...
> > I have a book that says nics are layer 2 and a book that says they are
> layer
> > 1...Which is correct
> >
> >
> >
>
>
| |
| Brian Schwarz 2002-08-21, 1:28 pm |
| You can make a valid argument the NIC really functions at both the Physical
and the Data Link layer. After all, NICs have hard-wired MAC addresses, and
MAC addresses are definitely operate of the Data Link layer. For an
Ethernet NIC, the Physical Layer function includes everything that converts
electricity (or light if you're using Ethernet over fiber) into a pattern of
ones and zeros, and the Data Link function includes all of the Ethernet
specific functions (CSMA/CD, MAC addresses, Ethernet frames, etc.)
Remember that the OSI model is just a model - an attempt to describe the
"real world." The real world, unfortunately, doesn't always fit neatly into
the categories we devise.
Best wishes,
Brian Schwarz
www.bluecollartech.com
--
____________________________
The opinions expressed here are my
own, and do not reflect those of my
employers - past, present, or future.
____________________________
"Michael Boerigter" <boerrigt@prodigy.net> wrote in message
news:VUM89.2580$1_6.295986335@newssvr16.news.prodigy.com...
> A NIC is a Physical Layer (Layer 1) device since it they take care of many
> of the physical aspects of network data. Some other Layer 1 devices are
> transceivers, repeaters, hubs and MAUs.
>
> MIke
>
> "yappledapple" <dafamily05@charter.net> wrote in message
> news:um7612finhj98a@corp.supernews.com...
> > I have a book that says nics are layer 2 and a book that says they are
> layer
> > 1...Which is correct
> >
> >
> >
>
>
| |
| Michael Boerrigter 2002-08-21, 6:28 pm |
| Hi Brian:
Thanks for the follow-up; I wholeheartedly agree. However, for the Network+
exam the NIC is considered Layer 1 (?).
Mike
"Brian Schwarz" <brian@_no_spam_bluecollartech.com> wrote in message
news:UAQ89.8644$9U6.3309073@news3.news.adelphia.net...
> You can make a valid argument the NIC really functions at both the
Physical
> and the Data Link layer. After all, NICs have hard-wired MAC addresses,
and
> MAC addresses are definitely operate of the Data Link layer. For an
> Ethernet NIC, the Physical Layer function includes everything that
converts
> electricity (or light if you're using Ethernet over fiber) into a pattern
of
> ones and zeros, and the Data Link function includes all of the Ethernet
> specific functions (CSMA/CD, MAC addresses, Ethernet frames, etc.)
>
> Remember that the OSI model is just a model - an attempt to describe the
> "real world." The real world, unfortunately, doesn't always fit neatly
into
> the categories we devise.
>
> Best wishes,
>
> Brian Schwarz
> www.bluecollartech.com
> --
>
> ____________________________
> The opinions expressed here are my
> own, and do not reflect those of my
> employers - past, present, or future.
> ____________________________
>
> "Michael Boerigter" <boerrigt@prodigy.net> wrote in message
> news:VUM89.2580$1_6.295986335@newssvr16.news.prodigy.com...
> > A NIC is a Physical Layer (Layer 1) device since it they take care of
many
> > of the physical aspects of network data. Some other Layer 1 devices are
> > transceivers, repeaters, hubs and MAUs.
> >
> > MIke
> >
> > "yappledapple" <dafamily05@charter.net> wrote in message
> > news:um7612finhj98a@corp.supernews.com...
> > > I have a book that says nics are layer 2 and a book that says they are
> > layer
> > > 1...Which is correct
> > >
> > >
> > >
> >
> >
>
>
| |
| Michael Boerrigter 2002-08-21, 7:29 pm |
| Hi Brian:
Thanks for the follow-up; I wholeheartedly agree. However, for the Network+
exam the NIC is considered Layer 1 (?).
Mike
"Brian Schwarz" <brian@_no_spam_bluecollartech.com> wrote in message
news:UAQ89.8644$9U6.3309073@news3.news.adelphia.net...
> You can make a valid argument the NIC really functions at both the
Physical
> and the Data Link layer. After all, NICs have hard-wired MAC addresses,
and
> MAC addresses are definitely operate of the Data Link layer. For an
> Ethernet NIC, the Physical Layer function includes everything that
converts
> electricity (or light if you're using Ethernet over fiber) into a pattern
of
> ones and zeros, and the Data Link function includes all of the Ethernet
> specific functions (CSMA/CD, MAC addresses, Ethernet frames, etc.)
>
> Remember that the OSI model is just a model - an attempt to describe the
> "real world." The real world, unfortunately, doesn't always fit neatly
into
> the categories we devise.
>
> Best wishes,
>
> Brian Schwarz
> www.bluecollartech.com
> --
>
> ____________________________
> The opinions expressed here are my
> own, and do not reflect those of my
> employers - past, present, or future.
> ____________________________
>
> "Michael Boerigter" <boerrigt@prodigy.net> wrote in message
> news:VUM89.2580$1_6.295986335@newssvr16.news.prodigy.com...
> > A NIC is a Physical Layer (Layer 1) device since it they take care of
many
> > of the physical aspects of network data. Some other Layer 1 devices are
> > transceivers, repeaters, hubs and MAUs.
> >
> > MIke
> >
> > "yappledapple" <dafamily05@charter.net> wrote in message
> > news:um7612finhj98a@corp.supernews.com...
> > > I have a book that says nics are layer 2 and a book that says they are
> > layer
> > > 1...Which is correct
> > >
> > >
> > >
> >
> >
>
>
| |
| nettminder 2002-08-21, 9:28 pm |
| You know, the way I read it in the All-in-One book by Mike Meyers states
that NICs operate at both Layer 1 and Layer 2 of the OSI model. On the test
note, I did have that exact question asked, and you could only select one
answer. Naturally I answered that the NIC was a Layer 1 device.
nettminder
"Michael Boerrigter" <boerrigt@nospam.com> wrote in message
news:JfV89.598$bb3.64391377@newssvr15.news.prodigy.com...
> Hi Brian:
>
> Thanks for the follow-up; I wholeheartedly agree. However, for the
Network+
> exam the NIC is considered Layer 1 (?).
>
> Mike
>
> "Brian Schwarz" <brian@_no_spam_bluecollartech.com> wrote in message
> news:UAQ89.8644$9U6.3309073@news3.news.adelphia.net...
> > You can make a valid argument the NIC really functions at both the
> Physical
> > and the Data Link layer. After all, NICs have hard-wired MAC addresses,
> and
> > MAC addresses are definitely operate of the Data Link layer. For an
> > Ethernet NIC, the Physical Layer function includes everything that
> converts
> > electricity (or light if you're using Ethernet over fiber) into a
pattern
> of
> > ones and zeros, and the Data Link function includes all of the Ethernet
> > specific functions (CSMA/CD, MAC addresses, Ethernet frames, etc.)
> >
> > Remember that the OSI model is just a model - an attempt to describe the
> > "real world." The real world, unfortunately, doesn't always fit neatly
> into
> > the categories we devise.
> >
> > Best wishes,
> >
> > Brian Schwarz
> > www.bluecollartech.com
> > --
> >
> > ____________________________
> > The opinions expressed here are my
> > own, and do not reflect those of my
> > employers - past, present, or future.
> > ____________________________
> >
> > "Michael Boerigter" <boerrigt@prodigy.net> wrote in message
> > news:VUM89.2580$1_6.295986335@newssvr16.news.prodigy.com...
> > > A NIC is a Physical Layer (Layer 1) device since it they take care of
> many
> > > of the physical aspects of network data. Some other Layer 1 devices
are[c
olor=darkred]
> > > transceivers, repeaters, hubs and MAUs.
> > >
> > > MIke
> > >
> > > "yappledapple" <dafamily05@charter.net> wrote in message
> > > news:um7612finhj98a@corp.supernews.com...
> > > > I have a book that says nics are layer 2 and a book that says they[/color]
are[c
olor=darkred]
> > > layer
> > > > 1...Which is correct
> > > >
> > > >
> > > >
> > >
> > >
> >
> >
>
>
>[/color]
| |
| nettminder 2002-08-21, 10:29 pm |
| You know, the way I read it in the All-in-One book by Mike Meyers states
that NICs operate at both Layer 1 and Layer 2 of the OSI model. On the test
note, I did have that exact question asked, and you could only select one
answer. Naturally I answered that the NIC was a Layer 1 device.
nettminder
"Michael Boerrigter" <boerrigt@nospam.com> wrote in message
news:JfV89.598$bb3.64391377@newssvr15.news.prodigy.com...
> Hi Brian:
>
> Thanks for the follow-up; I wholeheartedly agree. However, for the
Network+
> exam the NIC is considered Layer 1 (?).
>
> Mike
>
> "Brian Schwarz" <brian@_no_spam_bluecollartech.com> wrote in message
> news:UAQ89.8644$9U6.3309073@news3.news.adelphia.net...
> > You can make a valid argument the NIC really functions at both the
> Physical
> > and the Data Link layer. After all, NICs have hard-wired MAC addresses,
> and
> > MAC addresses are definitely operate of the Data Link layer. For an
> > Ethernet NIC, the Physical Layer function includes everything that
> converts
> > electricity (or light if you're using Ethernet over fiber) into a
pattern
> of
> > ones and zeros, and the Data Link function includes all of the Ethernet
> > specific functions (CSMA/CD, MAC addresses, Ethernet frames, etc.)
> >
> > Remember that the OSI model is just a model - an attempt to describe the
> > "real world." The real world, unfortunately, doesn't always fit neatly
> into
> > the categories we devise.
> >
> > Best wishes,
> >
> > Brian Schwarz
> > www.bluecollartech.com
> > --
> >
> > ____________________________
> > The opinions expressed here are my
> > own, and do not reflect those of my
> > employers - past, present, or future.
> > ____________________________
> >
> > "Michael Boerigter" <boerrigt@prodigy.net> wrote in message
> > news:VUM89.2580$1_6.295986335@newssvr16.news.prodigy.com...
> > > A NIC is a Physical Layer (Layer 1) device since it they take care of
> many
> > > of the physical aspects of network data. Some other Layer 1 devices
are[c
olor=darkred]
> > > transceivers, repeaters, hubs and MAUs.
> > >
> > > MIke
> > >
> > > "yappledapple" <dafamily05@charter.net> wrote in message
> > > news:um7612finhj98a@corp.supernews.com...
> > > > I have a book that says nics are layer 2 and a book that says they[/color]
are[c
olor=darkred]
> > > layer
> > > > 1...Which is correct
> > > >
> > > >
> > > >
> > >
> > >
> >
> >
>
>
>[/color]
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