Some operating systems prefer a wireline （ ） over wireless because it is assumed to have more bandwidth and be more reliable, and some operating systems （ ） the user to define the preference order of the available interfaces.
阅读下面的短文，回答问题 From the paragraph above，we can see that the router （ ） a forwarding table according to the routing table and possible routing policies existing in the router. When an IP packet arrives at a router, the （ ） part of packet is normally checked by the router. An IP router checks every IP Packet individually and makes the forwarding decision based on （ ）.