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[CCNA] Undertanding Next hop routing answer

It's actually a subnetting question.

1. 10.1.1.10 has to fall into the 255.255.0.0 mask so it goes to 3.3

2. 10.1.0.14 falls into the 255.255.255.0 mask so it goes to 2.2

3. doesn't fall into the explicit so it uses the default route 1.1

and so on from there.

reply to JDmailNY
Assuming the router is configured to support IP classless and those routes are active in routing table, then jester121 is correct.

reply to jester121
I hope I'm not asking too much, but can you tell me how you calculated that these ip's feel at these masked and goes to another ip.'
Thanks

Sure. The route statements (starting at the bottom and working up) are for particular subnets. The third one says

"For the network 10.1.0.0/16 (which is a subnet mask of 255.255.0.0) route everything to 192.168.3.3"

The network in question goes from 10.1.0.1 to 10.1.255.254, not counting the first and last IP address.

The second route statement pertains only to the network 10.1.0.0/24 (which is a subnet mask fo 255.255.255.0) and covers the range of 10.1.0.1 to 10.1.0.254.

The route statements are like a plumbing system with different sized pipes, in that routing goes from most specific to least specific. Since 10.1.0.x is explicitly told to route to 192.168.2.2, that's where it goes. All the other 10.1.x.x addresses go to 192.168.3.3. Stuff that is outside that range, like 10.6.8.4 in option #6, use the default route:

ip route 0.0.0.0 0.0.0.0 192.168.1.1

If you're not real strong on subnetting, it's really important to learn that. It's a challenging concept but once you learn it it's hammered home and you can figure out a LOT of problems, and also do some neat networking stuff.

I learned from this website, »www.learntosubnet.com/ There are probably some flasher ones out there but this one was explained in a way that worked with my brain patterns.

As always, thanks so much, I need all the help I can get, One more exam and I'm a CCNA. Thanks to people like you.

One more exam, and your'e a ccna? The question you were asking is at the basic level..How's your knowledge of acl's and
maybe encrypting routing protocol updates?

reply to JDmailNY

reply to JDmailNY
JDmailNY,

don't get too caught up with the last two comments. Generally, you'll get that from the folks who work in the switching/routing arena "daily" and forget some folks are trying to get there, hence asking the appropriate questions.

I got my CCNA almost 3yrs ago, but have been stuck managing a Windows SharePoint shop, therefore alot of my routing knowledge has "fallen off the table" yet I still managed to pass my BCMSN (Switching) for my CCNP (BSCI, ISCW and ONT left). It's great that the video boot camp I'm following (TrainSignal CCNP BSCI video boot camp) goes back over basic routing.

I've also visited a few CCNP classes that teach the CCNP and teach "the same stuff" the CCNA taught; the difference is now you don't have to switch between routing "and" switching concepts. Depending upon the CCNP class you take, you'll specialize/learn "specifically" that particuar track.

Don't sweat it if you stumble here or there; nobody knows it all, but it's good to have a CISCO reference guide in the area should you have questions. If you do your CCNP, "everything" you learned in CCNA will be "re-hashed" but more "in-depth" (I promise). Think of CCNA as your undergrad (bachelor's), CCNP as your graduate (master's), and the CCIE as your doctorate (Phd).

Jay

>DocLarge
Dont be rediculous, tomkb knows it all ;-P

*heh*

reply to jester121

reply to mikeyb4760

reply to JDmailNY
I left out "updates' when talking about routing protocols

semantics.. I suppose, but it's the same as service password-encryption which is type 7 hashing, but it is described as encryption.. Your're right, I,m wrong good enough?

reply to JDmailNY
I don't know.. I'd have to agree with the people saying you shouldn't be a CCNA if you don't know this..

I just finished the first course in the Cisco Net Acad last semester, and currently working on Routing Protocols.. I'm not even a CCNA and I knew the answer.. lol.

reply to DocLarge
Doc what your saying is so true and very helpful.

reply to JDmailNY
Well,

Router1(config)#ip route 0.0.0.0 0.0.0.0 192.168.1.1
Router1(config)#ip route 10.1.0.0 255.255.255.0 192.168.2.2
Router1(config)#ip route 10.1.0.0 255.255.0.0 192.168.3.3

that just doesn't work.

The last 2 routes will never be installed in the routing table, because the default you entered points to a host and not an interface.

Because the last 2 routes, your destination and your next hop are resolved via the default(doesn't have to be necessarily the default, it could be any other route) the router wont install them in the routing table. The only way for that to happen is if the default points to an interface, and even tho they will still be both resolved by the default, it will do so because that way it will reduce ARP requests.

otherwise those answers are tricky.