Infrastructure vs. Ad Hoc

[farmerdave]

Well, I just passed the 640-802 on 11-19-07, and I used only Todd's book to prepare. The new passing score is 825, and I got a 920. (Thanks, Todd.) Out of the material asked in the 52 questions on my exam only two, as I recall, were not covered in your book.

While I am not permitted to say what I saw on the exam, I would ask you to include a short discussion of infrastructure vs. ad hoc networks. I would also request, specifically, that a definition of IBSS (Independent Basic Service Set) be included (which is an another term for an ad hoc network).

Thanks!

Dave
CCNA until November 2010.

[lammle]

Dave, congratulations.

That's a great score!

Since I wrote the book before the exam was released, I am still pretty happy with my covereage of the exam objectives.

I do need to add a few notes in this forum, some wireless as you mention.

Cheers!
Todd Lammle

[Discover Cisco]

Here's a quick guide on Ad-Hoc and Infrastructure for the n00bs out there. :D


Ad-hoc
- Generally used for small networks
- NO Access point
- Connects two or more clients in a peer-to-peer wireless network
- All clients are equal
- Area covered is called Independent Basic Service Set (IBSS)


Infrastructure
- Generally used for larger networks
- Has only ONE Access point!
- All clients have equal access
- Clients can't directly communicate with each other
- Area covered is called Basic Service Set (BSS)


Extended Service Set (ESS)
- A collection of Basic Service Sets (BSS's)
- Uses multiple Access Points (each access point is in a seperate BSS)
- Each Access Point should be connected to the same IP subnet.
- Each Access Point must have the same SSID
- Each Access Point must use non-overlapping channels

Edit: Added on from farmerdave's suggestion

[farmerdave]

Thanks, "Discover Cisco," for the quick guide on Ad-Hoc vs. Infrastructure. May I suggest that you add three more points to the Extended Service Set (ESS) section?

- Each Access Point should be connected to the same IP subnet.

- Each Access Point must have the same SSID

- Each Access Point must use non-overlapping channels

[Discover Cisco]

Thanks, "Discover Cisco," for the quick guide on Ad-Hoc vs. Infrastructure. May I suggest that you add three more points to the Extended Service Set (ESS) section?

- Each Access Point should be connected to the same IP subnet.

- Each Access Point must have the same SSID

- Each Access Point must use non-overlapping channels
Just added your points Dave! :)

[harunaabdullahi]

Well, I just passed the 640-802 on 11-19-07, and I used only Todd's book to prepare. The new passing score is 825, and I got a 920. (Thanks, Todd.) Out of the material asked in the 52 questions on my exam only two, as I recall, were not covered in your book.

While I am not permitted to say what I saw on the exam, I would ask you to include a short discussion of infrastructure vs. ad hoc networks. I would also request, specifically, that a definition of IBSS (Independent Basic Service Set) be included (which is an another term for an ad hoc network).

Thanks!

Dave
CCNA until November 2010.
Hello Dave,

Iam really preparing my ccna right now please what areas do u advice to concentrate more as you had recently sat and pass the ccna 640-802.
moreso,wiereless was added to it and you are giving suggestion on this areas to be included thr sutdy guide.

Best wishes,

Haruna

[lammle]

The information in this post is needed when studying for the CCNA objectives.

I did not put enough information regarding BSS, IBSS and ESS in that chapter.

Remember that I wrote the book before the exam came out.

This is why this forum is so helpful!

If you are studing for your exam, read the posts in this link.

I wouldn't worry too much about SDM or IPv6 at this time. They are in the objectives, but I'd study my NAT a lot harder then I would study SDM and IPv6.

Just my thoughts...and that's about as much as I'll ever say! :)

Cheers!
Todd