Mac Sleeping Problems

Question

This problem just started Monday and I've never had this before until now. I put my Mac to sleep on Monday night before I went to bed. Exactly 20 minutes later it wakes itself back up like it's possessed or something. I put it back to sleep and then again, 20 minutes exactly, it wakes back up again. So I shut it off so it wouldn't wake back up again.
Yesterday, (Tuesday) night I put the computer to sleep after putting it on a surge protector and it went to sleep fine.
Today (Wednesday), I put the computer to sleep at midnight the night before and never woke it up again during the day. Then I was into my room and see it just turned on. I check the logs to see if my cat hit the keyboard again but I got this.
May 14 00:27:32 Ashleys-Computer kernel[0]: System Sleep
May 14 19:00:07 Ashleys-Computer kernel[0]: System Wake
May 14 19:00:07 Ashleys-Computer kernel[0]: EIR is not supported.
May 14 19:00:07 Ashleys-Computer mDNSResponder[23]: ERROR: mDNSPlatformTCPConnect - connect failed: socket 17: Error 50 Network is down
May 14 19:00:07 Ashleys-Computer mDNSResponder[23]: ERROR: mDNSPlatformTCPConnect - connect failed: socket 17: Error 65 No route to host
May 14 19:00:08: --- last message repeated 3 times ---
May 14 19:00:07 Ashleys-Computer mDNSResponder[23]: ERROR: mDNSPlatformTCPConnect - connect failed: socket 21: Error 65 No route to host
May 14 19:00:08: --- last message repeated 4 times ---
May 14 19:00:07 Ashleys-Computer mDNSResponder[23]: mDNSPlatformSendUDP sendto failed to send packet on InterfaceID 00820800 en0/4 to 224.0.0.251:5353 skt 7 error -1 errno 65 (No route to host) 3191019314
May 14 19:00:07 Ashleys-Computer mDNSResponder[23]: mDNSPlatformSendUDP sendto failed to send packet on InterfaceID 0080E600 en2/4 to 224.0.0.251:5353 skt 7 error -1 errno 65 (No route to host) 3191019314
May 14 19:00:07 Ashleys-Computer mDNSResponder[23]: mDNSPlatformSendUDP sendto failed to send packet on InterfaceID 0084A000 en3/4 to 224.0.0.251:5353 skt 7 error -1 errno 65 (No route to host) 3191019314
May 14 19:00:07 Ashleys-Computer mDNSResponder[23]: mDNSPlatformSendUDP sendto failed to send packet on InterfaceID 00820800 en0/4 to 224.0.0.251:5353 skt 7 error -1 errno 65 (No route to host) 3191019314
May 14 19:00:07 Ashleys-Computer mDNSResponder[23]: mDNSPlatformSendUDP sendto failed to send packet on InterfaceID 0080E600 en2/4 to 224.0.0.251:5353 skt 7 error -1 errno 65 (No route to host) 3191019314
May 14 19:00:07 Ashleys-Computer mDNSResponder[23]: mDNSPlatformSendUDP sendto failed to send packet on InterfaceID 0084A000 en3/4 to 224.0.0.251:5353 skt 7 error -1 errno 65 (No route to host) 3191019314
May 14 19:00:08 Ashleys-Computer mDNSResponder[23]: mDNSPlatformSendUDP sendto failed to send packet on InterfaceID 00820800 en0/4 to 224.0.0.251:5353 skt 7 error -1 errno 65 (No route to host) 3191019564
May 14 19:00:08 Ashleys-Computer mDNSResponder[23]: mDNSPlatformSendUDP sendto failed to send packet on InterfaceID 0080E600 en2/4 to 224.0.0.251:5353 skt 7 error -1 errno 65 (No route to host) 3191019564
May 14 19:00:08 Ashleys-Computer mDNSResponder[23]: mDNSPlatformSendUDP sendto failed to send packet on InterfaceID 0084A000 en3/4 to 224.0.0.251:5353 skt 7 error -1 errno 65 (No route to host) 3191019564
May 14 19:00:08 Ashleys-Computer mDNSResponder[23]: mDNSPlatformSendUDP sendto failed to send packet on InterfaceID 00820800 en0/4 to 224.0.0.251:5353 skt 7 error -1 errno 65 (No route to host) 3191019814
May 14 19:00:08 Ashleys-Computer mDNSResponder[23]: mDNSPlatformSendUDP sendto failed to send packet on InterfaceID 0080E600 en2/4 to 224.0.0.251:5353 skt 7 error -1 errno 65 (No route to host) 3191019814
May 14 19:00:08 Ashleys-Computer mDNSResponder[23]: mDNSPlatformSendUDP sendto failed to send packet on InterfaceID 0084A000 en3/4 to 224.0.0.251:5353 skt 7 error -1 errno 65 (No route to host) 3191019814
May 14 19:00:08 Ashleys-Computer configd[35]: AppleTalk shutdown
I don't understand why this happened all of the sudden. It's like my computer has it's own mind or something.

Answer 1

Tried any of the following?
Post in Skype forums regarding your problem with them?
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Try the basics first:
   Change your router channel number.  Most times this works & is all you have to do.
Disconnect & reconnect your modem.  unplug it for about 10 seconds.  Plug it back in.  Do the same for Apple’s routers.  Wait for everything to reboot.
System Preferences>Network
Click the Assist Me button.
In the next window that pops up, click the Diagnostic button & do the necessary.
Research Knowledge Base for network problems that pertain to the OS that is currently installed on your computer.   See these basic networking KB Articles:  http://support.apple.com/kb/HT1401 AirPort troubleshooting guide
http://support.apple.com/kb/HT2712 Using network locations in Mac OS X
Manually provided DNS server addresses are higher priority than DHCP's
http://support.apple.com/kb/HT1714 Solutions for connecting to the Internet, setting up a small network, and troubleshooting
============================
What to do when you can't connect to the Internet
Also, run the Airport Utility app which is located inside the Utilities folder.
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If using a  Linksys router, contact LinkSys Customer Support and/or post in their forums.
If using Apple's Airport, please re-post over in one of the AirPort Forums.