Remote desktop within home network?

Is there an easy way to remote access a 7 system from XP within a home network? (No 3rd party software plz)

I hear people are having problems with remote desktop away from home, but is it any different doing it between 2 pcs in the same house?

Can I prevent people outside the network from attempting remote connection?

(EDIT: nvm, I was thinking of putting the remote PC to sleep when not connected, and waking it up to save power. Looks like you can't even wake up the remote PC remotely...)

I know you have said no 3rd party software but I've been using TeamViewer v7 for years set to accept LAN connections exclusively and have complete control over three other LAN connected computers, including XP. I can't see how TV could be improved upon for this situation.

can TV wake up remote computer to establish connection?

I suspect not, but I don't use Sleep normally. However I'll test it for you.

I remotely put a Win 7 system to sleep and cannot now connect to it with TV. I suspect this is why I stopped using Sleep some years ago. So as DocBrown says it probably depends on your BIOS having a wake-on-lan capability that actually works. So if this is mainly about power saving maybe TV isn't the answer for you.