CCNA question

Posted on 2006-05-13
Medium Priority
Last Modified: 2011-10-03
i am so confued with this question. Some expert explained this question already but i don't understand few parts.  

The command "ip route 100" was
configured on a router named TK1. No routing protocols or other static routes are
configured on the Corporate router yet.
Based on this information, which statement is true about this command?

E. Packets destined for host will be sent to
Question by:ittechlab
LVL 32

Accepted Solution

jhance earned 80 total points
ID: 16675279
This is not really a routing question so much as it is a SUBNETTING question.  If you understand subnets and network masks you will understand this route.

1) The subnet mask here is  That gives 6 bits or 64 addresses of IP address space on the specified subnet.

2) The subnet in question is  So coupled with the subnet mask you get a subnet IP range of -  So any IP address in this range is affected by this command.

3) The question asks about  Is this in your "target" range?  Yes, it is.  Therefore the command is in effect.

4) So since there is a match on the range, the destination for this rout, is used.  

5) The 100 is not relevant here.  It's the metric and is only an issue when there is more than one possible route.  The system will use the route with the lowest metric in case of more than one route.

Expert Comment

ID: 16675288 is a subnet because of the netmask That network is most likely directly connected to the Corporate router, since the Corporate router has no routing protocols or static routes. On the TK1 router, there may be an interface with an IP address of On the Corporate router, there may be another inteface with the IP address and a netmask of Since the is directly connected to the Corporate router, no routing protocols or static reoutes are required.

TK1                                                 Corporate
interface ----------------> interface
                                                       interface -----------------> network.

The arrow represents the flow of traffic.


Expert Comment

ID: 16675292
100 is Administrative distance, and it would only come into account when there were multiple routes.
LVL 57

Expert Comment

ID: 16676235
You need to read up on IP subnets and learn it works. Untill you learn about IP subnets you will not understand anything.

As you are studing for CCNA I would suggest the following from Cicso:


I would also suggest the following RedBook published by IBM.  This give you the history and basics of TCP/IP:


Expert Comment

ID: 16681674

   I would very strongly suggest you to get the hold of IP subnetting as it is very important is you are choosing Networking as your career. I think it will be very difficult for you to Pass CCNA if you are not comfortable with IP SUBNETTING. I have heard some guys have passed CCNA without giving enough stress over subnetting ( I Don't know how). And when they started to attend intereviews for companies, they came to know the real importance of IP Subnetting. Whichever Intereview you attend.. You will get heaps of questions regarding subnetting. And remember one thing.. "IP SUBNETTING IS VERY VERY EASY" all you have to do is just give it some time.. which will be worthwhile through your life. Belive me. I think all the experts here agree to this.

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

How to fix a SonicWall Gateway Anti-Virus firewall blocking automatic updates to apps like Windows, Adobe, Symantec, etc.
In this article I will be showing you how to subnet the easiest way possible for IPv4 (Internet Protocol version 4). This article does not cover IPv6. Keep in mind that subnetting requires lots of practice and time.
Viewers will learn how to connect to a wireless network using the network security key. They will also learn how to access the IP address and DNS server for connections that must be done manually. After setting up a router, find the network security…
This video gives you a great overview about bandwidth monitoring with SNMP and WMI with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're looking for how to monitor bandwidth using netflow or packet s…

609 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question