Ground control to Major Tom...

[k0mbachi]

I just received an email offer for a zillion CCNA question for only pennies. One of the sample questions is below. See anything wrong? Somehow I suspect these questions weren't written by a high level cisco person. 8)

Sample: CCNA Practice Question 3

Question
Which Data Link layer devices would you use to connect multiple network segments into a single logical network segment? Select two answers.

A. Bridge
B. Switch
C. Router
D. Gateway

Explanation
The answers are "Bridge" and "Switch"

Bridges and switches, which are Data Link layer devices, are used to connect multiple network segments into a single logical network segment. This means that because these devices cannot segment the network like a router can, the network becomes a larger single collision network.

 

[wybnormal]

OK,.. lets get a few things straight here. A bridge is not the same thing as a switch. A switch in simple terms is a group of bridges mounted in a common box. A switch breaks a segment into multiple collision domains.. a router breaks the segement into multiple broadcast domains.

technically speaking the two answers are correct as both a bridge and a switch function at layer 2 and will connect multiple segments together into a "flat" network. The question of If you can talk to them is a completely different matter. But the answer loses it about the domains.

So to recap..

A bridge has a single broadcast domain and single collision domain.

A switch has a single broadcast domain and multiple collision domains

MikeS
Find me at

http://www.packetattack.com

"Take advantage of the enemy's unreadiness, make your way by unexpected routes, and attack unguarded spots."
Sun Tzu

 

[k0mbachi]

Yes, the answer is correct. The problem was in the explanation regarding the "single, large collision domain". Even a rookie like me knows switches provide separate collision domains.