你应该在linux服务器上使用两个网卡吗？

this may sound ridiculous, but i'm really not sure whether to use the 2nd NIC on a linux server. what do you do with your 2nd NIC? is it for redundancy or for throughput? on our mail server (postfix), we're very confused as to what is the optimal use of that 2nd NIC. thanks so much!this may sound ridiculous, but i'm really not s