14. ICA vs. RDP Citrix ICA is much more robust than RDP, but is also much more expensive. Feature Description RDP4 RDP5 ICA Clients 32-bit client for Windows® based PCs X X X Windows CE-based client X X X UNIX client, Macintosh client, Java client , Linux, Browser, DOS X Transport Protocols TCP/IP X X X SPX, IPX, NetBEUI and Direct Asynch X