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Home > Archive > alt.certification.network-plus > September 2002 > NIC on which OSI layer ?
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NIC on which OSI layer ?
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| Barry Watzman 2002-09-25, 4:29 pm |
| I'm seeing various texts some of which claim the NIC is at the OSI layer
1 (physical) and others saying layer 2 (Data link).
What is the consensus ?
[Planning to take Network+ on Friday, although not definite yet]
| |
| Andy Barkl 2002-09-25, 4:29 pm |
| "Barry Watzman" <Watzman@neo.rr.com> wrote in message
news:3D921AC3.8060004@neo.rr.com...
> I'm seeing various texts some of which claim the NIC is at the OSI layer
> 1 (physical) and others saying layer 2 (Data link).
>
> What is the consensus ?
>
> [Planning to take Network+ on Friday, although not definite yet]
Both layers. It has a Physical layer connection and a Data Link layer
address. Good luck on your exam.
Discount CompTIA exam vouchers
Prometric- http://vouchers.wetrainit.com
VUE- http://vuevouchers.wetrainit.com
| |
| Charles M. Kozierok 2002-09-25, 7:29 pm |
| In article <Ngpk9.72028$S32.4455032@news2.west.cox.net>,
Andy Barkl <abarkl@NOSPAM.wetrainit.com> wrote:
} "Barry Watzman" <Watzman@neo.rr.com> wrote in message
} news:3D921AC3.8060004@neo.rr.com...
} > I'm seeing various texts some of which claim the NIC is at the OSI layer
} > 1 (physical) and others saying layer 2 (Data link).
} >
} > What is the consensus ?
} >
} > [Planning to take Network+ on Friday, although not definite yet]
}
} Both layers. It has a Physical layer connection and a Data Link layer
} address. Good luck on your exam.
Yup.
Note that most LAN/WLAN technologies themselves include logic or
circuitry that functions at both layers, including Ethernet.
peace,
-*-
charles
| |
| Charles M. Kozierok 2002-09-25, 8:29 pm |
| In article <Ngpk9.72028$S32.4455032@news2.west.cox.net>,
Andy Barkl <abarkl@NOSPAM.wetrainit.com> wrote:
} "Barry Watzman" <Watzman@neo.rr.com> wrote in message
} news:3D921AC3.8060004@neo.rr.com...
} > I'm seeing various texts some of which claim the NIC is at the OSI layer
} > 1 (physical) and others saying layer 2 (Data link).
} >
} > What is the consensus ?
} >
} > [Planning to take Network+ on Friday, although not definite yet]
}
} Both layers. It has a Physical layer connection and a Data Link layer
} address. Good luck on your exam.
Yup.
Note that most LAN/WLAN technologies themselves include logic or
circuitry that functions at both layers, including Ethernet.
peace,
-*-
charles
| |
| Robert 'Dr. Bob' Morton 2002-09-25, 8:29 pm |
| Charles M. Kozierok wrote:
> In article <Ngpk9.72028$S32.4455032@news2.west.cox.net>,
> Andy Barkl <abarkl@NOSPAM.wetrainit.com> wrote:
> } "Barry Watzman" <Watzman@neo.rr.com> wrote in message
> } news:3D921AC3.8060004@neo.rr.com...
> } > I'm seeing various texts some of which claim the NIC is at the OSI layer
> } > 1 (physical) and others saying layer 2 (Data link).
> } >
> } > What is the consensus ?
> } >
> } > [Planning to take Network+ on Friday, although not definite yet]
> }
> } Both layers. It has a Physical layer connection and a Data Link layer
> } address. Good luck on your exam.
>
> Yup.
>
> Note that most LAN/WLAN technologies themselves include logic or
> circuitry that functions at both layers, including Ethernet.
>
> peace,
>
> -*-
> charles
You might have to be careful how the question was worded. For example,
I am taking an Into To Netowking though an online Univesity
(http://www.rsuonline.edu). The book is a prep book for Networking+.
One of the questions on the test I had to take today said that if the
netwrok card was examinied and not put back into the slot fully so that
it did not work, on what level of the OSI would the failure be.
Besides it being a case of PEBKAC, the correct answer is the physical
layer, because that deals with the voltages, etc. and a card not
inserted properly is not going to have its voltages.
So it may have to be read in the context of the question.
The Doc
| |
| Robert 'Dr. Bob' Morton 2002-09-25, 9:29 pm |
| Charles M. Kozierok wrote:
> In article <Ngpk9.72028$S32.4455032@news2.west.cox.net>,
> Andy Barkl <abarkl@NOSPAM.wetrainit.com> wrote:
> } "Barry Watzman" <Watzman@neo.rr.com> wrote in message
> } news:3D921AC3.8060004@neo.rr.com...
> } > I'm seeing various texts some of which claim the NIC is at the OSI layer
> } > 1 (physical) and others saying layer 2 (Data link).
> } >
> } > What is the consensus ?
> } >
> } > [Planning to take Network+ on Friday, although not definite yet]
> }
> } Both layers. It has a Physical layer connection and a Data Link layer
> } address. Good luck on your exam.
>
> Yup.
>
> Note that most LAN/WLAN technologies themselves include logic or
> circuitry that functions at both layers, including Ethernet.
>
> peace,
>
> -*-
> charles
You might have to be careful how the question was worded. For example,
I am taking an Into To Netowking though an online Univesity
(http://www.rsuonline.edu). The book is a prep book for Networking+.
One of the questions on the test I had to take today said that if the
netwrok card was examinied and not put back into the slot fully so that
it did not work, on what level of the OSI would the failure be.
Besides it being a case of PEBKAC, the correct answer is the physical
layer, because that deals with the voltages, etc. and a card not
inserted properly is not going to have its voltages.
So it may have to be read in the context of the question.
The Doc
| |
| Russ S 2002-09-25, 9:29 pm |
| Data Link - no argument.
Defines the rules for accessing the physical layer - sublayers are MAC and
LLC (LLC has own standard - IEEE 802.2).
RussS
A+, Net+
| |
| Barry Watzman 2002-09-25, 9:29 pm |
| I could argue that one and say that the device drivers, which we all
agree are on level 2, would fail.
However, while most of us probably agree that the card also operates on
both level 1 and 2, if you are sitting there with a multiple choice
screen and there are two choices, and one will be graded wrong, I'm not
sure what the correct choice would be. But the consensus seems to be
level 2.
"Both layers" doesn't work unless it's one of the answer choices, even
though most of us would agree that it's correct.
Robert 'Dr. Bob' Morton wrote:
> Charles M. Kozierok wrote:
>
>> In article <Ngpk9.72028$S32.4455032@news2.west.cox.net>,
>> Andy Barkl <abarkl@NOSPAM.wetrainit.com> wrote:
>> } "Barry Watzman" <Watzman@neo.rr.com> wrote in message
>> } news:3D921AC3.8060004@neo.rr.com...
>> } > I'm seeing various texts some of which claim the NIC is at the OSI
>> layer
>> } > 1 (physical) and others saying layer 2 (Data link).
>> } >
>> } > What is the consensus ?
>> } >
>> } > [Planning to take Network+ on Friday, although not definite yet]
>> } } Both layers. It has a Physical layer connection and a Data Link layer
>> } address. Good luck on your exam.
>>
>> Yup.
>> Note that most LAN/WLAN technologies themselves include logic or
>> circuitry that functions at both layers, including Ethernet.
>>
>> peace,
>>
>> -*-
>> charles
>
>
> You might have to be careful how the question was worded. For example,
> I am taking an Into To Netowking though an online Univesity
> (http://www.rsuonline.edu). The book is a prep book for Networking+.
> One of the questions on the test I had to take today said that if the
> netwrok card was examinied and not put back into the slot fully so that
> it did not work, on what level of the OSI would the failure be.
>
> Besides it being a case of PEBKAC, the correct answer is the physical
> layer, because that deals with the voltages, etc. and a card not
> inserted properly is not going to have its voltages.
>
> So it may have to be read in the context of the question.
>
> The Doc
>
| |
| Russ S 2002-09-25, 10:29 pm |
| Data Link - no argument.
Defines the rules for accessing the physical layer - sublayers are MAC and
LLC (LLC has own standard - IEEE 802.2).
RussS
A+, Net+
| |
| Barry Watzman 2002-09-25, 10:29 pm |
| I could argue that one and say that the device drivers, which we all
agree are on level 2, would fail.
However, while most of us probably agree that the card also operates on
both level 1 and 2, if you are sitting there with a multiple choice
screen and there are two choices, and one will be graded wrong, I'm not
sure what the correct choice would be. But the consensus seems to be
level 2.
"Both layers" doesn't work unless it's one of the answer choices, even
though most of us would agree that it's correct.
Robert 'Dr. Bob' Morton wrote:
> Charles M. Kozierok wrote:
>
>> In article <Ngpk9.72028$S32.4455032@news2.west.cox.net>,
>> Andy Barkl <abarkl@NOSPAM.wetrainit.com> wrote:
>> } "Barry Watzman" <Watzman@neo.rr.com> wrote in message
>> } news:3D921AC3.8060004@neo.rr.com...
>> } > I'm seeing various texts some of which claim the NIC is at the OSI
>> layer
>> } > 1 (physical) and others saying layer 2 (Data link).
>> } >
>> } > What is the consensus ?
>> } >
>> } > [Planning to take Network+ on Friday, although not definite yet]
>> } } Both layers. It has a Physical layer connection and a Data Link layer
>> } address. Good luck on your exam.
>>
>> Yup.
>> Note that most LAN/WLAN technologies themselves include logic or
>> circuitry that functions at both layers, including Ethernet.
>>
>> peace,
>>
>> -*-
>> charles
>
>
> You might have to be careful how the question was worded. For example,
> I am taking an Into To Netowking though an online Univesity
> (http://www.rsuonline.edu). The book is a prep book for Networking+.
> One of the questions on the test I had to take today said that if the
> netwrok card was examinied and not put back into the slot fully so that
> it did not work, on what level of the OSI would the failure be.
>
> Besides it being a case of PEBKAC, the correct answer is the physical
> layer, because that deals with the voltages, etc. and a card not
> inserted properly is not going to have its voltages.
>
> So it may have to be read in the context of the question.
>
> The Doc
>
| |
| Russ S 2002-09-26, 12:29 am |
| Hey Barry
I just passed the test last week and the answer Comptia wants is L2 0 Data
Layer as described in the Mike Meyers All In One and also the Syngress book.
The Data Link Layer defines the rules for accessing and using the Physical
Layer. The majority of Data Link layer functions take place inside the NIC.
RussS
A+, Net+
| |
| Russ S 2002-09-26, 1:29 am |
| Hey Barry
I just passed the test last week and the answer Comptia wants is L2 0 Data
Layer as described in the Mike Meyers All In One and also the Syngress book.
The Data Link Layer defines the rules for accessing and using the Physical
Layer. The majority of Data Link layer functions take place inside the NIC.
RussS
A+, Net+
| |
|
| All hardware devices operate at Layer1 - physical (transmission of bits)
The relevant question (& the best way to interpret such questions) is =
"What is the highest level (of the ones offered) at which each device =
operates?"
http://www.geocities.com/SiliconVal...e/osimodel.html
"Barry Watzman" <Watzman@neo.rr.com> wrote in message =
news:3D921AC3.8060004@neo.rr.com...
> I'm seeing various texts some of which claim the NIC is at the OSI =
layer=20
> 1 (physical) and others saying layer 2 (Data link).
>=20
> What is the consensus ?
>=20
> [Planning to take Network+ on Friday, although not definite yet]
>
| |
|
| All hardware devices operate at Layer1 - physical (transmission of bits)
The relevant question (& the best way to interpret such questions) is =
"What is the highest level (of the ones offered) at which each device =
operates?"
http://www.geocities.com/SiliconVal...e/osimodel.html
"Barry Watzman" <Watzman@neo.rr.com> wrote in message =
news:3D921AC3.8060004@neo.rr.com...
> I'm seeing various texts some of which claim the NIC is at the OSI =
layer=20
> 1 (physical) and others saying layer 2 (Data link).
>=20
> What is the consensus ?
>=20
> [Planning to take Network+ on Friday, although not definite yet]
>
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