CCIE Pursuit Blog

May 23, 2008

Question Of The Day: 23 May, 2008

Topic: Multicast

What is the MAC Address of 242.9.169.28?

Click Here For The Answer


Yesterday’s Question

Question Of The Day: 22 May, 2008 

Topic: Multicast

Which well-known multicast groups do each of the following addresses below to:

224.0.0.1
224.0.0.2 
224.0.0.5
224.0.0.6 
224.0.0.9 
224.0.0.10   
224.0.1.39 
224.0.1.40 

Answer:
224.0.0.1  All systems on this subnet 
224.0.0.2  All routers on this subnet   
224.0.0.5  All OSPF routers 
224.0.0.6  OSPF designated routers 
224.0.0.9  RIP-2 routers 
224.0.0.10  EIGRP routers   
224.0.1.39  Cisco-RP-Announce 
224.0.1.40  Cisco-RP-Discovery

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6 Comments »

  1. […] Click Here For The Answer […]

    Pingback by Question Of The Day: 22 May, 2008 « CCIE Pursuit — May 23, 2008 @ 4:11 pm | Reply

  2. 224.0.0.13 is also a good one to memorize

    Comment by ahenning — May 24, 2008 @ 8:06 am | Reply

  3. Just use “nslookup”, “dig” or “host” to find out these 😉

    C:\Documents and Settings\xxx>nslookup 224.0.0.2
    Server: x.x.x
    Address: x.x.x.x

    Name: ALL-ROUTERS.MCAST.NET
    Address: 224.0.0.2

    Comment by Tassos — May 25, 2008 @ 2:41 am | Reply

  4. @ahenning – Good point. I’m not sure how I missed that one.

    @Tassos – That is an awesome tip. I was completely unaware that nslookup would do that.

    Comment by cciepursuit — May 25, 2008 @ 5:35 am | Reply

  5. […] Question Of The Day: 23 May, 2008  […]

    Pingback by Question Of The Day: 26 May, 2008 « CCIE Pursuit — May 26, 2008 @ 9:45 am | Reply

  6. Somehow i missed the point. Probably lost in translation 🙂 Anyway … nice blog to visit.

    cheers, Ale!

    Comment by Ale — June 19, 2008 @ 8:13 am | Reply


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