alt.certification.network-plus - Could use some help with these questions please

Author

Could use some help with these questions please

Duhomax

2003-10-10, 4:25 am

sorry if this gets posted twice...only meant to post once

I just took the Network+ today and passed with a 700. Although I was having a hard time with some of the questions. Here's some of the questions I was having trouble with (at least that I can remember). I was hoping some of you could help me with them.

The wording isn't exact, it's only what I can remember.

Question 1)
There exists:
1. Workstations in Group A
2. Servers in Group A
3. Workstations in Group B
4. Servers in Group B
You move Servers in Group A to Group B.
Workstations in Group A can no longer access Servers A.
Workstations in Group A CAN access other workstations in Group A.
What is wrong?

-you need to delete the ARP cache in Workstations A
-you need to change the ARP cache in Workstations A
-you need to delete the NetBIOS cache in Workstations A
-you need to change the LMHOSTS in Workstations A
-you need to delete the LMHOSTS in Workstations A

i put "delete the ARP cache"

Which type of fiber optic cable do you "twist" to install?
ST or SC

i put "ST"

Which 2 of these devices identifies computers by MAC address ONLY?

-hub
-switch
-layer 2 switch
-bridge
-router

i put "switch and bridge"

Which of the 802 standards uses the "ring" topology? (OK, that was definitely NOT the right wording but it was something like that, it specifically didn't say Token Ring, only Ring)

-802.1
-802.2
-802.3
-802.4
-802.5

i put 802.5

Which of these is considered a "diaster recovery" solution?
tape backup
or
server mirroring

i put tape backup

On that last question I wasn't sure because tape backup can be considered "diaster recovery" if the tapes are stored in another building, and server mirroring can be considered "diaster recovery" if the mirror is in another building.

Thanks for all your help.

.: Scope :.

2003-10-13, 9:24 pm

>
> Which type of fiber optic cable do you "twist" to install?
> ST or SC
>
> i put "ST"
>

ST is right. You have to twist it to connect it.

..: ScOpE :.

ITguy_uk

2003-10-20, 5:25 am

"Duhomax" <duho@blahblah.com> wrote in message news:<ujthb.4087$HT6.1691@fe03.atl2.webusenet.com>...
> sorry if this gets posted twice...only meant to post once
>
> I just took the Network+ today and passed with a 700. Although I was having a hard time with some of the questions. Here's some of the questions I was having trouble with (at least that I can remember). I was hoping some of you could help me with them.

>
> The wording isn't exact, it's only what I can remember.
>
> Question 1)
> There exists:
> 1. Workstations in Group A
> 2. Servers in Group A
> 3. Workstations in Group B
> 4. Servers in Group B
> You move Servers in Group A to Group B.
> Workstations in Group A can no longer access Servers A.
> Workstations in Group A CAN access other workstations in Group A.
> What is wrong?
>
> -you need to delete the ARP cache in Workstations A
> -you need to change the ARP cache in Workstations A
> -you need to delete the NetBIOS cache in Workstations A
> -you need to change the LMHOSTS in Workstations A
> -you need to delete the LMHOSTS in Workstations A
>
> i put "delete the ARP cache"
>
> Which type of fiber optic cable do you "twist" to install?
> ST or SC
>
> i put "ST"
>
> Which 2 of these devices identifies computers by MAC address ONLY?
>
> -hub
> -switch
> -layer 2 switch
> -bridge
> -router
>
> i put "switch and bridge"
>
> Which of the 802 standards uses the "ring" topology? (OK, that was definitely NOT the right wording but it was something like that, it specifically didn't say Token Ring, only Ring)
>
> -802.1
> -802.2
> -802.3
> -802.4
> -802.5
>
> i put 802.5
>
> Which of these is considered a "diaster recovery" solution?
> tape backup
> or
> server mirroring
>
> i put tape backup
>
> On that last question I wasn't sure because tape backup can be considered "diaster recovery" if the tapes are stored in another building, and server mirroring can be considered "diaster recovery" if the mirror is in another building.
>
> Thanks for all your help.

On that last question I would think technically either could be
Dissaster recovery it depends how you implement them. To me DR in this
context means being able to run the companies core IT services from
another site because the normal site is inaccessible due to a
dissaster ie Fire, Flood, Earthquake

If you mirror a server locally or keep tape backups on site then this
is not dissaster recovery as if your main site is inaccessible you
cannot recover in the event of a dissaster as the mirrored servers and
tape backups will be unavailable.

However if you mirror your servers to a geographically remote site or
store your tape backups offsite then this is dissaster recover as you
could restore your core IT systems without access to your main site.

If both was not an anwser and you had to choose one I would think in
the Network+ exam the backup tape option is the dissaster recovery
option. I say this as it is more common, cheaper and easier to use
this option than remote mirroring. It does seem that the Network+
exam in some places is more what happens in theory than in practise
and tries to make grey areas black and white.

angient

2003-10-20, 6:25 pm

"Duhomax" <duho@blahblah.com> wrote in message news:<ujthb.4087$HT6.1691@fe03.atl2.webusenet.com>...
> sorry if this gets posted twice...only meant to post once
>
> I just took the Network+ today and passed with a 700. Although I was having a hard time with some of the questions. Here's some of the questions I was having trouble with (at least that I can remember). I was hoping some of you could help me with them.

>
> The wording isn't exact, it's only what I can remember.
>
> Question 1)
> There exists:
> 1. Workstations in Group A
> 2. Servers in Group A
> 3. Workstations in Group B
> 4. Servers in Group B
> You move Servers in Group A to Group B.
> Workstations in Group A can no longer access Servers A.
> Workstations in Group A CAN access other workstations in Group A.
> What is wrong?
>
> -you need to delete the ARP cache in Workstations A
> -you need to change the ARP cache in Workstations A
> -you need to delete the NetBIOS cache in Workstations A
> -you need to change the LMHOSTS in Workstations A
> -you need to delete the LMHOSTS in Workstations A
>
> i put "delete the ARP cache"
>
I think that the correct answer is the 4th one. the LMHOSTS file maps
the computer netbios name to its ip address. when the server(s) moved
to subnet b they were given a new ip address. therefore when computers
on subnet A tried to connect to it, they were mapping to its old ip
address. you must change the entry in the LMHOSTS file to map to the
new address.

> Which type of fiber optic cable do you "twist" to install?
> ST or SC
>
> i put "ST"

> Which 2 of these devices identifies computers by MAC address ONLY?
>
> -hub
> -switch
> -layer 2 switch
> -bridge
> -router
>
> i put "switch and bridge"
>
> Which of the 802 standards uses the "ring" topology? (OK, that was definitely NOT the right wording but it was something like that, it specifically didn't say Token Ring, only Ring)
>
> -802.1
> -802.2
> -802.3
> -802.4
> -802.5
>
> i put 802.5
>
> Which of these is considered a "diaster recovery" solution?
> tape backup
> or
> server mirroring
>
> i put tape backup
>
> On that last question I wasn't sure because tape backup can be considered "diaster recovery" if the tapes are stored in another building, and server mirroring can be considered "diaster recovery" if the mirror is in another building.

Disaster recovery is recuperating after the disaster has occured. Tape
backup is a form of disaster recovery. server mirroring is a form of
disaster prevention.
> Thanks for all your help.

ITguy_uk

2003-10-21, 6:25 am

angesq21@hotmail.com (angient) wrote in message news:<5383093f.0310201356.7117a199@posting.google.com>...
> "Duhomax" <duho@blahblah.com> wrote in message news:<ujthb.4087$HT6.1691@fe03.atl2.webusenet.com>...
> > sorry if this gets posted twice...only meant to post once
> >
> > I just took the Network+ today and passed with a 700. Although I was having a hard time with some of the questions. Here's some of the questions I was having trouble with (at least that I can remember). I was hoping some of you could help me with them

angient

2003-10-22, 6:26 pm

you're wrong i'm right.

ITguy_uk

2003-10-23, 5:25 am

This is a classic case of "thats what the text books say" and learning
parrot fashion rather than understanding the underlying concepts. This
is exactly why companies do not employee people who have lots of certs
and no commercial experience.

As for your wrong I am right without any justification, I really think
people like you should stay out of the IT industry!

angesq21@hotmail.com (angient) wrote in message news:<5383093f.0310221330.3d600513@posting.google.com>...
> you're wrong i'm right.

angient

2003-10-27, 12:26 pm

fault tolerance and disaster recovery are not the same thing. fault
tolerance is a method of eliminating a single point of failure (ex.
disk mirroring, striping with parity, clustering, etc). Disaster
recovery is the process of restoring a network back to the way it was
before the "disaster". You assume that the disaster is a fire, flood,
terrorism (?), but more likely it is due to hardware repair,
replacement, file restoration, etc. Dont take the word to literally.
For example, if a user accidentally erases the DATA folder, restoring
it from backup tapes is disaster recovery.

You said that tape backups and server mirroring can be both, disaster
recovery and fault tolerance, if they are kept onsite. If the backup
tapes are stored onsite, unprotected, it is still disaster recovery
but it is not being implemented correctly. The proper way to
implement disaster recovery with backup tapes is to store them offsite
in a fire proof safe or another safe location. When you take a test
and they mention tape backups as the disaster recovery plan, you have
to assume that the tapes are being kept offsite unless specified
otherwise.

You argue that server mirroring is better than using backup tapes for
data backup. You show me an article that says so. I don't think that
you completely understand what server mirroring is. If you use server
mirroring to create an immediate copy of all the data saved on one
server to the other, can you imagine the traffic that would be created
by such a thing. Tape backups take long to restore if you want them
to, have you heard of differential, incremental, and full?

In your post you said that "disaster recovery means that you can
continue business as usual without having any access to your servers
or data."

Correct me if I'm wrong, but if you do not have access to your
servers or data you CAN NOT continue business as usual.Maybe you can
explain this to me because I'm not quite as advanced as you to
understand such a concept.

Comptia does not want your opinion, they have surveys for that, but if
you are going to give it, make sure that you know what you are talking
about.

As far as I can tell you are only right about one thing, i have no
real experience but that is not a problem for me, if I know so much
more than someone who does: YOU.

*angel
paper network+

ITguy_uk

2003-10-31, 12:25 pm

Angel,

Seeing as that was quite a long post I will reply to each section in
turn:

> fault tolerance and disaster recovery are not the same thing. fault
> tolerance is a method of eliminating a single point of failure (ex.
> disk mirroring, striping with parity, clustering, etc). Disaster
> recovery is the process of restoring a network back to the way it was
> before the "disaster".

I never said they were the same thing, however I do agree with your
points about the difference between DR and fault tolerance.

> You assume that the disaster is a fire, flood,
> terrorism (?), but more likely it is due to hardware repair,
> replacement, file restoration, etc. Dont take the word to literally.
> For example, if a user accidentally erases the DATA folder, restoring
> it from backup tapes is disaster recovery.

The definition I use for an IT dissaster is "A (DISASTER) involves a
sudden failure in a subsystem, or the system as a whole, that damages
more than one unit and in doing so disrupts the ongoing or future
output of the system"

The primary objective of a Dissaster recovery plan is to enable an
organization to survive a disaster and to reestablish normal business
operations. In order to survive, the organization must assure that
critical operations can resume normal processing within a reasonable
timeframe.

If an IT system is implemented correctly any of the following should
not be affect more than one component of a system i.e a dissaster as
it is covered by using backup procedures and fault tolerance:

Hardware repair

File restoration

Can you imagine a company instituting its DR plan because a hard disk
failed or a user mistakenly deleted a file? If you class a single
hardware failure or a user deleting a file a dissaster then something
is badly wrong with your backup, fault tolerance provisions.

> You said that tape backups and server mirroring can be both, disaster
> recovery and fault tolerance, if they are kept onsite. If the backup
> tapes are stored onsite, unprotected, it is still disaster recovery
> but it is not being implemented correctly. The proper way to
> implement disaster recovery with backup tapes is to store them offsite
> in a fire proof safe or another safe location. When you take a test
> and they mention tape backups as the disaster recovery plan, you have
> to assume that the tapes are being kept offsite unless specified
> otherwise.
The original question was:

Which of these is considered a "dissaster recovery" solution?
tape backup
or
server mirroring
They didn't mention tape backups as the dissaster recovery plan, they
asked whether tape backup is considered a "dissaster recovery"
solution.

Assuming that any tape backup mentioned in any test question relating
to dissaster recovery is referring to offsite backups is a dangerous
assumption. This maybe the case in entry level tests but I very much
doubt this is the case in higher level certifications CISSP, IT
degrees. Maybe this is why so many companies never take their tapes
off site and think they have a DR plan?

> You argue that server mirroring is better than using backup tapes for
> data backup. You show me an article that says so. I don't think that
> you completely understand what server mirroring is. If you use server
> mirroring to create an immediate copy of all the data saved on one
> server to the other, can you imagine the traffic that would be created
> by such a thing. Tape backups take long to restore if you want them
> to, have you heard of differential, incremental, and full?

Again I never said that server mirroring is better than tape backup. I
did however state that remote server mirroring is preferable in some
situations like high availability enviroments e.g Finance, Defence.
Remote server mirroring in the hot backup format to me is when a
remote server is kept in synch with the local server via a permanent
connection. The servers are initially installed as identical servers,
as data is written to the local servers disk they are also written to
the remote servers disk. Should the local server become unavailable
the clients/users are automatically switched to the DR site server
using an automated or manual process. Having worked with many large
organisations including Financial Institutions I know that this is
exactly how they manage their dissaster recovery. As for the comment
about "can I imagine the traffic this would create". For one when only
the differences are synchronised from one server to another there is
not a relatively small amount of traffic compared with synching the
whole server and secondly when you are talking about high availability
enviroments the cost of links is balanced against the potential loss
of revenue or life. In these situations the live site and the DR site
are often connected by one if not multiple large pipes e.g T1,T2,T3
circuits so large amounts of traffic are not a concern.

As for Differential, incremental and Full backups:

Differential
Only backs up files since last FULL backup
Restore requires most recent full backup and most recent differential
backup
Does not clear archive bit

Incremental
Only backs up files added or changed since last backup
Restore requires last full backup tape plus all incremental tapes
since last full backup.
Clears archive bit on all backed-up files

Full Backup
A backup of all files on system
Clears archive bit on all backed up files.

As for the amount of time backups take to restore. Using my definition
of Dissaster recovery you do not have the original data so the first
thing to do would be to restore the last full backup and then either
every incremental since then or the latest differential to a new
server or disk. Either way you are having to restore the whole server
which will not be as quick as a hot backup mirrored server. The
difference is in the cost, server mirroring is usually more expensive
than the equivalent tape solution as you need to run two or more
servers and have the necessary systems to perform the switch over. The
cost needs to be balanced against what is considered to be acceptable
downtime. If the acceptable downtime is only seconds due to financial
loss (think financial applications)then restoring from a tape that
will take hours is not acceptable and the cost of server mirroring
will be outweighed by the potential loss. However if you are for
example a small company that can afford to be offline for several
hours and cannot justify the cost of hot backup mirrored servers then
offsite tape may be your only choice.

>
> In your post you said that "disaster recovery means that you can
> continue business as usual without having any access to your servers
> or data."
>
> Correct me if I'm wrong, but if you do not have access to your
> servers or data you CAN NOT continue business as usual.Maybe you can
> explain this to me because I'm not quite as advanced as you to
> understand such a concept.

This is the whole point of dissaster recovery, in the event of a
dissaster either the original data is not accessible or the whole site
is not accessible. Dissaster recovery is all about making your data
readily available in the event of losing the original data, whether
this is the loss of a single server or a whole site. This can be by
using tapes or server mirroring. Are you telling me that should the
large financial institutions etc lose their central site e.g. Head
Office (think September 11) they could not continue trading? Did the
NYSE, Banks etc permanently cease trading after September 11?

> Comptia does not want your opinion, they have surveys for that, but if
> you are going to give it, make sure that you know what you are talking
> about.
> As far as I can tell you are only right about one thing, i have no
> real experience but that is not a problem for me, if I know so much
> more than someone who does: YOU.

As for Comptia wanting my opinion, they may well not be interested in
my opinon as a single person at the moment but I know they are
interested in what employers and therefore candidates think of their
certs. Whats the point of having the certification and who will want
it if it is not respected? One thing you will learn with experience is
todays non-decision making employee could possibly be the very
decision maker they want on side later on in their career? Ever heard
the saying "Be careful whos feet you step on, as they maybe attached
to the ar$e you are kissing in the future"?

All through your post it shows that you have no real life experience
and your knowledge of dissaster reovery is limited to very small
installations (SOHO). Isn't the whole reason for getting these certs
to improve your job prospects? At one time you may have been able to
get work in the IT industry using just knowledge and certs but
thankfully this is no longer the case. Although it is not a problem
for you currently having no experience and supposedly knowing more
than some who does. It will soon become a problem when you are
competing in interviews against people who have more experience and
knowlege than yourself. How may IT jobs have you seen recently that
state "No experience necessary"?

angient

2003-11-01, 2:24 am

Good answer.

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