SFP, SFP + and XFP compare

SFP + and SFP
1. SFP and SFP + looks the same size;
2. SFP protocol specification: IEEE802.3, SFF-8472;

SFP + and XFP
1. SFP + and XFP are 10G fiber modules, and other types of 10G modules can communicate;
2. SFP + is smaller than the XFP form factor;
3. because a smaller volume SFP + signal modulation function, serial / deserializer, MAC, clock and data recovery (CDR), as well as electronic dispersion compensation (EDC) function from the module over the motherboard card;
4. XFP protocol compliance: XFP MSA agreement;
5. SFP + protocol compliance: IEEE 802.3ae, SFF-8431, SFF-8432;
6. SFP + is more mainstream design.

SFP +
1. SFP + has a more compact package than the X2 and XFP form factor (with SFP same size);
2, can be the same type of XFP, X2, XENPAK direct connection;
3. cost lower than XFP, X2, XENPAK.