Hi,I would like to know these two answers...

1)config the igrp,which is right?
a.igrp 100
network 192.168.1.0
network 10.0.0.0
b.igrp 100
network 192.168.1.0
network 10.2.0.0

What is the point here giving us 10.0.0.0 and 10.2.0.0.? Can someone clarify for me?


2)How does inter-VLAN communication take place

3)Which two WAN data link layer protocol support multiple upper layer
protocol.

Was it HDLC and PPP ?

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1)config the igrp,which is right?
a.igrp 100
network 192.168.1.0
network 10.0.0.0

Should be router igrp 100. IGRP is classful; it will choke with 10.2.0.0.


2)How does inter-VLAN communication take place

Through trunk links.


3)Which two WAN data link layer protocol support multiple upper layer
protocol.
Was it HDLC and PPP ?

Err, I think so...

Cheers!


[This message has been edited by dmaftei (edited 12-13-2000).]

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Thanks, dmaftei..

But, I am sorry I still don't get it.. I read that IGRP is a classfull.. but how 10.2.0.0 can be wrong?

Also, what is trunk lines....?

Could you or someone help me clarify?

Thanks, Zig

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Boy this is great stuff for someone who is studying the BSCN test.

IGRP is classful; meaning it will summarize routes when updating the routing table. It will always use the default class subnet address. Meaning a route to network 10.2.0.0 will be summarized to 10.0.0.0. No big deal really; the only bad part is if you have discontiguous networks - theoretically you could have one interface summarizing a route to 10.1.0.0 as 10.0.0.0 and on another interface, the route to network 10.2.0.0 would also be summarized as 10.0.0.0. Obviously that would cause a little problem.

I could be wrong here, but I thought inter-VLAN communication could only take place through a layer 3 device.

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I'll take a shot at the questions.

1) The network number, when config'n igrp can contain NO subnet or host info.

2) Inter-VLAN comm is provided by layer 3 routing.

3) PPP uses NCPs to encapsulate multiple protocols.
HDLC is an encapsulation protocol derived from SDLC. HDLC supports both point-to-point and multipoint links.

It's not much, but I hope it helps.

Diablo
A+, Network+, i-Net+ &
Cisco Networking Academy Program Student

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Hey, all answers are wrong for the IGRP. They need an autonous system number.(D just saw your response you are right dude)

router(config router)# router igrp 100 (or whatever)
network (network number)
network (network number)

Yes, in order for you to run VLANS from a switch you need a router. Switches run from MAC while router runs from IP> VLAN tagging is accomplished from L3 ISL tagging/enapsulation.

Q

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quote:

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Originally posted by dmaftei:
2)How does inter-VLAN communication take place

Through trunk links.

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Thanks everyone for taking a time to explain.. I am a lot clear now..

Zig

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