Show IP route

Everest63Everest63 Member Posts: 6 ■□□□□□□□□□
Hi folks,
This is a subnetting question relating to the show ip route command
I'm on page 359 of the chapter IP Routing of Todd Lamme's book CCENT INCD1 Study Guide 100-105
I know quite a bit (sorry, no pun intended) about subnetting but there's always a question that can stump me when the subnetting question comes from a different angle.

P. 359

Based on the output of the routing table which interface will a packet with a destination address of be forwarded from?

Gateway of last resort is not set

C /28 is directly connected, FastEthernet0/0
L /32 is directly connected, FastEthernet0/0
C /29 is directly connected, FastEthernet0/1
L /32 is directly connected, FastEthernet0/1
C /30 is directly connected, FastEthernet0/2
L /32 is directly connected, FastEthernet0/2
C /30 is directly connected, Serial 0/0
L /32 is directly connected, Serial0/0

The answer is:
The packet with destination address of will be forwarded from C /29 is directly connected, FastEthernet0/1

Isn't this a "What subnet does this host address belong to type of question?

Is there a quick & easy method to figure this out?


  • Options
    clarsonclarson Member Posts: 903 ■■■■□□□□□□
    Isn't this a "What subnet does this host address belong to type of question? Yes, it is

    looking for where should be connected.

    work your way down the connected networks. is the network address (the lowest address on that network) so isn't going to be on that network.
    next connected network is looks good. check the block size. /29 block size is 8. so the network is .8 - .15
    So, goes right there.

    what is so hard about that.
  • Options
    blatiniblatini Member Posts: 285
    Yes, and because it is that type of question that's the network it needs to go to.

    The other networks don't have that address in their range.
Sign In or Register to comment.