The DSSS (direct-sequence spread spectrum) refurs to IEEE (Institute for Electrical and Electronic Engineers) protocol 802. 11. b. This just specifies standards to be used in communications. I can explain this more, but I will probably just confuse you.
The 1500/1500 is bps or bits per second. This is your potential upload and down load speed for your internet connetion. In other words how fast you can move information to and from the Internet.
The IP stands for Internet Protocol, this is short for the name of the protocol used in todays communications. It is called TCP/IP, for Transmission Control Protocol / Internet Protocol. This address is to your computer like the address is to your house.
DHCP (Dynamic Host Configuration Protocol) is just the way your computer obtains its IP address. When you are using DHCP, your computer does not have a perminant address. The address can change when the lease on it expires. When it expires, a new address is issued to it by your ISP (Internet service provider) DHCP server. Companies use DHCP because it is an efficient way of distributing IP addresses.
On RTR, I am not sure. The only RTR I can think of is Ready To Run, but that is mostly software dealing with cross-platform systems and communicaiton between these levels.
www.rtr.com