manageable and unmanageable switches造句

It has strong IT infrastructure with 20 Mbit / s broadband line from BTCL with 1 Mbit / s from other ISP as backup for Internet facility, a router for routing, a firewall for internet security, five high configuration server as mails server, proxy server, database server, seven midlevel configuration of workstations for other servers and backup server, a core switch, several manageable and unmanageable switches for intranet connectivity.
It's difficult to find manageable and unmanageable switches in a sentence. 用manageable and unmanageable switches造句挺难的