Why do I have redundant routing in Windows 7?

Posted by Mark on Super User See other posts from Super User or by Mark
Published on 2012-12-17T22:33:18Z Indexed on 2012/12/17 23:05 UTC
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windows-7

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routing

I'm trying to better understand my routing tables. My routing table is:

    IPv4 Route Table
    ===========================================================================
    Active Routes:
    Network Destination        Netmask          Gateway       Interface  Metric
1.           0.0.0.0          0.0.0.0      192.168.1.1    192.168.1.151     25
2.         127.0.0.0        255.0.0.0         On-link         127.0.0.1    306
3.         127.0.0.1  255.255.255.255         On-link         127.0.0.1    306
4.   127.255.255.255  255.255.255.255         On-link         127.0.0.1    306
5.       192.168.1.0    255.255.255.0         On-link     192.168.1.151    281
6.     192.168.1.151  255.255.255.255         On-link     192.168.1.151    281
7.     192.168.1.255  255.255.255.255         On-link     192.168.1.151    281
8.         224.0.0.0        240.0.0.0         On-link         127.0.0.1    306
9.         224.0.0.0        240.0.0.0         On-link     192.168.1.151    281
10.  255.255.255.255  255.255.255.255         On-link         127.0.0.1    306
11.  255.255.255.255  255.255.255.255         On-link     192.168.1.151    281
    ===========================================================================

Most of those entries make sense to me, but a few confuse me:

2 and 3 seem redundant, as do 2 and 4. Why not just 2?
5 and 6 seem redundant, as do 5 and 7. Why not just 5?

I'm trying to grok routing tables and this bit is still confusing me.

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